https://study.robustadev.com/ 2026-11-01T14:28:42.776Z https://study.robustadev.com/igcse-computer-science/ 2026-10-22T00:05:57.618Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/ 2026-10-21T02:37:03.063Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/ 2026-10-07T14:22:32.145Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/ 2026-10-22T00:05:57.618Z https://study.robustadev.com/igcse-co-ordinated-sciences/ 2026-11-01T14:28:42.776Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/ 2026-11-01T14:24:11.927Z https://study.robustadev.com/igcse-co-ordinated-sciences/b2-cells/ 2026-11-01T13:29:02.864Z https://study.robustadev.com/igcse-co-ordinated-sciences/b3-biological-molecules/ 2026-11-01T13:32:55.212Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/ 2026-11-01T12:20:54.741Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/ 2026-11-01T12:23:25.709Z https://study.robustadev.com/igcse-co-ordinated-sciences/c1-particulate-matter/ 2026-11-01T14:26:31.114Z https://study.robustadev.com/igcse-co-ordinated-sciences/p1-motion/ 2026-11-01T14:28:42.776Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/number-systems/ 2026-10-21T02:27:17.220Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/number-systems.jpg?v=tn8k5h Denary, binary and hexadecimal Place values, converting denary to binary and back, and why hex is used for bytes. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/number-systems.mp4?v=tn8k5h 161 2026-10-21T02:27:17.220Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/binary-addition-shifts/ 2026-10-21T02:22:43.900Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/binary-addition-shifts.jpg?v=tn8jxv Binary addition, overflow and shifts Adding binary numbers with carries, overflow when a ninth bit is needed, and logical shifts as multiply and divide. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/binary-addition-shifts.mp4?v=tn8jxv 150 2026-10-21T02:22:43.900Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/twos-complement/ 2026-10-21T02:37:03.063Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/twos-complement.jpg?v=tn8klr Two's complement Negative numbers in binary: the -128 place value, invert and add one, and reading a signed byte. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/twos-complement.mp4?v=tn8klr 132 2026-10-21T02:37:03.063Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/text-ascii-unicode/ 2026-10-21T02:35:23.825Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/text-ascii-unicode.jpg?v=tn8kiz Text: ASCII and Unicode Character sets give every character a code. ASCII's 128 codes, Unicode's millions, and the storage trade-off. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/text-ascii-unicode.mp4?v=tn8kiz 105 2026-10-21T02:35:23.825Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/images/ 2026-10-21T02:25:10.310Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/images.jpg?v=tn8k1y Images Pixels, resolution, colour depth, image file size and metadata. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/images.mp4?v=tn8k1y 87 2026-10-21T02:25:10.310Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/sound/ 2026-10-21T02:32:50.203Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/sound.jpg?v=tn8keq Sound Sampling an analogue wave: sample rate, bit depth, quality against file size. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/sound.mp4?v=tn8keq 98 2026-10-21T02:32:50.203Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/storage-units/ 2026-10-21T02:34:08.980Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/storage-units.jpg?v=tn8kgw Storage units and file sizes Bit to pebibyte in steps of 1024, and calculating image and sound file sizes. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/storage-units.mp4?v=tn8kgw 110 2026-10-21T02:34:08.980Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/compression/ 2026-10-21T02:24:05.686Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/compression.jpg?v=tn8k05 Compression Why files are compressed, lossy against lossless, and run-length encoding step by step. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/compression.mp4?v=tn8k05 118 2026-10-21T02:24:05.686Z https://study.robustadev.com/igcse-computer-science/grade-9-data-representation/quiz/ 2026-10-21T02:31:37.172Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-representation/quiz.jpg?v=tn8kcp Unit 1 quiz Ten questions with a think-time countdown and explained answers. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-representation/quiz.mp4?v=tn8kcp 338 2026-10-21T02:31:37.172Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/packet-switching/ 2026-09-30T14:38:00.994Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/packet-switching.jpg?v=tm6lzc Data packets and packet switching Packet structure, routing, out-of-order arrival and reassembly. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/packet-switching.mp4?v=tm6lzc 92 2026-09-30T14:38:00.994Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/transmission-modes/ 2026-09-30T14:35:25.025Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/transmission-modes.jpg?v=tm6lv1 Simplex, half-duplex and full-duplex Which way the data flows, and when. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/transmission-modes.mp4?v=tm6lv1 79 2026-09-30T14:35:25.025Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/serial-parallel/ 2026-09-30T14:36:03.004Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/serial-parallel.jpg?v=tm6lw3 Serial and parallel transmission Bits one by one or all at once, skew, crosstalk and USB. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/serial-parallel.mp4?v=tm6lw3 103 2026-09-30T14:36:03.004Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/error-detection/ 2026-09-30T14:32:46.307Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/error-detection.jpg?v=tm6lqm Error detection Why errors happen, and checksums, echo checks and ARQ. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/error-detection.mp4?v=tm6lqm 81 2026-09-30T14:32:46.307Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/parity/ 2026-09-30T14:33:48.089Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/parity.jpg?v=tm6lsc Parity checks Parity bits and parity blocks, including finding and fixing a flipped bit. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/parity.mp4?v=tm6lsc 73 2026-09-30T14:33:48.089Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/check-digits/ 2026-09-30T14:36:39.352Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/check-digits.jpg?v=tm6lx3 Check digits The multiply, add, divide-by-10 method with a worked example and a practice question. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/check-digits.mp4?v=tm6lx3 92 2026-09-30T14:36:39.352Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/encryption/ 2026-09-30T14:37:12.272Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/encryption.jpg?v=tm6ly0 Encryption Eavesdroppers, symmetric keys and the public and private key pair. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/encryption.mp4?v=tm6ly0 88 2026-09-30T14:37:12.272Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/quiz/ 2026-09-30T14:43:26.627Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/quiz.jpg?v=tm6m8e Unit 2 quiz Ten questions with a think-time countdown and explained answers. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/quiz.mp4?v=tm6m8e 308 2026-09-30T14:43:26.627Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/crosstalk/ 2026-10-07T13:34:03.617Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/crosstalk.jpg?v=tmjhor Crosstalk in transmission How a signal leaks into a neighbouring wire, corrupts data, and how twisted pairs and shielding fix it. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/crosstalk.mp4?v=tmjhor 92 2026-10-07T13:34:03.617Z https://study.robustadev.com/igcse-computer-science/grade-9-data-transmission/serial-parallel-uses/ 2026-10-07T14:22:32.145Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-data-transmission/serial-parallel-uses.jpg?v=tmjjxk When to use serial or parallel Choosing between serial and parallel: inside a computer, computer to printer, USB, Ethernet and a distance rule of thumb. https://study.robustadev.com/videos/igcse-computer-science/grade-9-data-transmission/serial-parallel-uses.mp4?v=tmjjxk 108 2026-10-07T14:22:32.145Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/cpu-architecture/ 2026-10-21T23:56:55.808Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/cpu-architecture.jpg?v=tna7uv Inside the CPU The control unit, ALU and registers, the Von Neumann architecture and the three buses. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/cpu-architecture.mp4?v=tna7uv 81 2026-10-21T23:56:55.808Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/fetch-decode-execute/ 2026-10-21T23:58:13.322Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/fetch-decode-execute.jpg?v=tna7x1 The fetch-decode-execute cycle Follow one instruction through the PC, MAR, MDR, CIR and ACC registers, then run a small program. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/fetch-decode-execute.mp4?v=tna7x1 96 2026-10-21T23:58:13.322Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/cpu-performance/ 2026-10-21T23:57:22.446Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/cpu-performance.jpg?v=tna7vm What makes a CPU faster? Clock speed, number of cores and cache size, with the run times worked out. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/cpu-performance.mp4?v=tna7vm 88 2026-10-21T23:57:22.446Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/embedded-systems/ 2026-10-21T23:57:42.104Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/embedded-systems.jpg?v=tna7w6 Embedded systems A computer built into a device for one job: examples, and how it differs from a general-purpose computer. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/embedded-systems.mp4?v=tna7w6 60 2026-10-21T23:57:42.104Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/input-devices/ 2026-10-21T23:58:50.174Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/input-devices.jpg?v=tna7y2 Input devices Keyboards, mice, touch screens, microphones, cameras, scanners and barcode / QR readers. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/input-devices.mp4?v=tna7y2 105 2026-10-21T23:58:50.174Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/output-devices/ 2026-10-22T00:00:04.677Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/output-devices.jpg?v=tna804 Output devices Screens, projectors, printers, 3D printers and speakers: what each one does. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/output-devices.mp4?v=tna804 101 2026-10-22T00:00:04.677Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/sensors-actuators/ 2026-10-22T00:05:57.618Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/sensors-actuators.jpg?v=tna89x Sensors and actuators A control loop: a sensor measures, the processor decides, an actuator acts. A thermostat shown step by step. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/sensors-actuators.mp4?v=tna89x 66 2026-10-22T00:05:57.618Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/primary-storage/ 2026-10-22T00:00:39.638Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/primary-storage.jpg?v=tna813 Primary storage: RAM, ROM and virtual memory Volatile RAM, non-volatile ROM with the boot program, and what virtual memory does when RAM is full. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/primary-storage.mp4?v=tna813 89 2026-10-22T00:00:39.638Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/secondary-storage/ 2026-10-22T00:05:19.758Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/secondary-storage.jpg?v=tna88v Secondary storage Magnetic, optical and solid-state storage, plus cloud storage. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/secondary-storage.mp4?v=tna88v 90 2026-10-22T00:05:19.758Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/network-hardware/ 2026-10-21T23:59:25.856Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/network-hardware.jpg?v=tna7z1 Network hardware: NIC, MAC, IP and routers What a network interface card, MAC address, IP address (IPv4 and IPv6) and router each do. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/network-hardware.mp4?v=tna7z1 94 2026-10-21T23:59:25.856Z https://study.robustadev.com/igcse-computer-science/grade-9-hardware/quiz/ 2026-10-22T00:02:54.415Z https://study.robustadev.com/posters/igcse-computer-science/grade-9-hardware/quiz.jpg?v=tna84u Unit 3 quiz Ten questions with a think-time countdown and explained answers. https://study.robustadev.com/videos/igcse-computer-science/grade-9-hardware/quiz.mp4?v=tna84u 310 2026-10-22T00:02:54.415Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/vocabulary/ 2026-11-01T13:24:58.495Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b1-classification/vocabulary.jpg?v=tntrxm B1 Characteristics and classification: key vocabulary Sixteen key words for IGCSE Co-ordinated Sciences topic B1 (characteristics and classification of living organisms), with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site that also practises twelve general science words. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b1-classification/vocabulary.mp4?v=tntrxm 488 2026-11-01T13:24:58.495Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/characteristics/ 2026-11-01T14:20:25.003Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b1-classification/characteristics.jpg?v=tntui1 Characteristics of living things The seven characteristics of all living organisms (movement, respiration, sensitivity, growth, reproduction, excretion, nutrition), each with a picture, and the word MRS GREN to remember them. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b1-classification/characteristics.mp4?v=tntui1 164 2026-11-01T14:20:25.003Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/classification/ 2026-11-01T14:21:54.874Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b1-classification/classification.jpg?v=tntuki Classification Why we classify organisms, the levels from kingdom to species, the definition of a species and the binomial name, the five kingdoms, vertebrate and arthropod groups, and how to use a dichotomous key. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b1-classification/classification.mp4?v=tntuki 209 2026-11-01T14:21:54.874Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/quiz/ 2026-11-01T14:24:11.927Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b1-classification/quiz.jpg?v=tntuob B1 quiz: characteristics and classification Ten think-time questions on the seven characteristics of living things, species, the binomial name, kingdoms, vertebrates and arthropods, and dichotomous keys. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b1-classification/quiz.mp4?v=tntuob 329 2026-11-01T14:24:11.927Z https://study.robustadev.com/igcse-co-ordinated-sciences/b2-cells/vocabulary/ 2026-11-01T13:29:02.864Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b2-cells/vocabulary.jpg?v=tnts4e B2 Cells: key vocabulary Sixteen key words for IGCSE Co-ordinated Sciences topic B2 (cells), with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site that also practises twelve general science words. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b2-cells/vocabulary.mp4?v=tnts4e 487 2026-11-01T13:29:02.864Z https://study.robustadev.com/igcse-co-ordinated-sciences/b3-biological-molecules/vocabulary/ 2026-11-01T13:32:55.212Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b3-biological-molecules/vocabulary.jpg?v=tntsav B3 Biological molecules: key vocabulary Fourteen key words for IGCSE Co-ordinated Sciences topic B3 (biological molecules), with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site that also practises twelve general science words. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b3-biological-molecules/vocabulary.mp4?v=tntsav 443 2026-11-01T13:32:55.212Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/vocabulary/ 2026-11-01T12:20:54.741Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/vocabulary.jpg?v=tntoyu B4 Enzymes: key vocabulary Twelve key words for IGCSE Co-ordinated Sciences topic B4, with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/vocabulary.mp4?v=tntoyu 353 2026-11-01T12:20:54.741Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/what-are-enzymes/ 2026-11-01T11:10:40.340Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/what-are-enzymes.jpg?v=tntlps What are enzymes? Why the body needs catalysts, what a catalyst does, and why enzymes are proteins that work as biological catalysts. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/what-are-enzymes.mp4?v=tntlps 101 2026-11-01T11:10:40.340Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/how-enzymes-work/ 2026-11-01T11:05:17.402Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/how-enzymes-work.jpg?v=tntlgt How enzymes work The active site, the substrate, the enzyme-substrate complex and the products; why complementary shapes make an enzyme specific. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/how-enzymes-work.mp4?v=tntlgt 100 2026-11-01T11:05:17.402Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/temperature-and-ph/ 2026-11-01T11:08:26.273Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/temperature-and-ph.jpg?v=tntlm2 Enzymes: temperature and pH Why a higher temperature speeds up an enzyme, what the optimum is, and how heat or the wrong pH changes the shape of the active site (denaturation). With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/temperature-and-ph.mp4?v=tntlm2 134 2026-11-01T11:08:26.273Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/enzyme-investigation/ 2026-11-01T11:04:40.184Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/enzyme-investigation.jpg?v=tntlfs Investigating enzymes: temperature and pH A practical with amylase, starch and iodine on a spotting tile: how to test the effect of temperature and pH, keep it a fair test and read the results. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/enzyme-investigation.mp4?v=tntlfs 136 2026-11-01T11:04:40.184Z https://study.robustadev.com/igcse-co-ordinated-sciences/b4-enzymes/quiz/ 2026-11-01T11:07:29.200Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b4-enzymes/quiz.jpg?v=tntlkh B4 quiz: enzymes Ten think-time questions on enzymes: catalysts, the active site, specificity, temperature, pH and the amylase practical. Below the video: written workbook questions with model answers. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b4-enzymes/quiz.mp4?v=tntlkh 330 2026-11-01T11:07:29.200Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/vocabulary/ 2026-11-01T12:23:25.709Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/vocabulary.jpg?v=tntp31 B5 Plant nutrition: key vocabulary Twelve key words for IGCSE Co-ordinated Sciences topic B5, with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/vocabulary.mp4?v=tntp31 345 2026-11-01T12:23:25.709Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/photosynthesis/ 2026-11-01T11:15:08.452Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/photosynthesis.jpg?v=tntlx8 Photosynthesis explained What photosynthesis is, the word and balanced equations, how chlorophyll changes light energy into chemical energy, and what plants do with the glucose. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/photosynthesis.mp4?v=tntlx8 150 2026-11-01T11:15:08.452Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-structure/ 2026-11-01T11:12:58.273Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-structure.jpg?v=tntltm Inside a leaf: structure and function A cross-section of a dicotyledonous leaf: cuticle, epidermis, palisade and spongy mesophyll, vascular bundle with xylem and phloem, stomata and guard cells, and what each one does. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-structure.mp4?v=tntltm 158 2026-11-01T11:12:58.273Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-experiments/ 2026-11-01T11:11:45.097Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-experiments.jpg?v=tntlrl Does a plant need chlorophyll, light and CO₂? How to test a leaf for starch, and the experiments that show chlorophyll, light and carbon dioxide are needed for photosynthesis, with controls. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/leaf-experiments.mp4?v=tntlrl 157 2026-11-01T11:11:45.097Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/rate-of-photosynthesis/ 2026-11-01T11:18:48.934Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/rate-of-photosynthesis.jpg?v=tntm3c The rate of photosynthesis A pondweed experiment: counting oxygen bubbles to see how light intensity and temperature change the rate of photosynthesis, and what a limiting factor is. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/rate-of-photosynthesis.mp4?v=tntm3c 123 2026-11-01T11:18:48.934Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/mineral-ions/ 2026-11-01T11:13:53.126Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/mineral-ions.jpg?v=tntlv5 Nitrate and magnesium: what plants need Why plants need nitrate ions (for amino acids and proteins) and magnesium ions (for chlorophyll), and what deficiency does to growth. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/mineral-ions.mp4?v=tntlv5 106 2026-11-01T11:13:53.126Z https://study.robustadev.com/igcse-co-ordinated-sciences/b5-plant-nutrition/quiz/ 2026-11-01T11:17:50.253Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/b5-plant-nutrition/quiz.jpg?v=tntm1q B5 quiz: plant nutrition Ten think-time questions on plant nutrition: photosynthesis, chlorophyll, leaf structure, transport, the starch test, limiting factors and mineral ions. Below the video: written workbook questions with model answers. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/b5-plant-nutrition/quiz.mp4?v=tntm1q 339 2026-11-01T11:17:50.253Z https://study.robustadev.com/igcse-co-ordinated-sciences/c1-particulate-matter/vocabulary/ 2026-11-01T14:16:20.844Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/c1-particulate-matter/vocabulary.jpg?v=tntub8 C1 The particulate nature of matter: key vocabulary Twelve key words for IGCSE Co-ordinated Sciences topic C1 (the particulate nature of matter), with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site that also practises twelve general science words. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/c1-particulate-matter/vocabulary.mp4?v=tntub8 376 2026-11-01T14:16:20.844Z https://study.robustadev.com/igcse-co-ordinated-sciences/c1-particulate-matter/states-of-matter/ 2026-11-01T14:08:57.276Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/c1-particulate-matter/states-of-matter.jpg?v=tnttyx States of matter The particle model of solids, liquids and gases, why gases can be compressed, the six changes of state, and why the temperature stays flat on a heating curve while a substance melts or boils. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/c1-particulate-matter/states-of-matter.mp4?v=tnttyx 195 2026-11-01T14:08:57.276Z https://study.robustadev.com/igcse-co-ordinated-sciences/c1-particulate-matter/diffusion/ 2026-11-01T14:10:26.824Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/c1-particulate-matter/diffusion.jpg?v=tntu1e Diffusion What diffusion is, why particles spread from high to low concentration, how temperature and particle mass change the speed, the ammonia and hydrogen chloride tube, and Brownian motion. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/c1-particulate-matter/diffusion.mp4?v=tntu1e 156 2026-11-01T14:10:26.824Z https://study.robustadev.com/igcse-co-ordinated-sciences/c1-particulate-matter/quiz/ 2026-11-01T14:26:31.114Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/c1-particulate-matter/quiz.jpg?v=tntus7 C1 quiz: particulate matter Ten think-time questions on solids, liquids and gases, the changes of state, the heating curve, diffusion and particle mass. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/c1-particulate-matter/quiz.mp4?v=tntus7 336 2026-11-01T14:26:31.114Z https://study.robustadev.com/igcse-co-ordinated-sciences/p1-motion/vocabulary/ 2026-11-01T14:19:02.876Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/p1-motion/vocabulary.jpg?v=tntufq P1 Motion: key vocabulary Twelve key words for IGCSE Co-ordinated Sciences topic P1 (motion), with the Vietnamese meaning, how to say each word, a picture and an example. Ends with a test section, and a typing trainer on the site that also practises twelve general science words. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/p1-motion/vocabulary.mp4?v=tntufq 372 2026-11-01T14:19:02.876Z https://study.robustadev.com/igcse-co-ordinated-sciences/p1-motion/speed-and-velocity/ 2026-11-01T14:11:56.842Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/p1-motion/speed-and-velocity.jpg?v=tntu3w Speed and velocity How to measure distance and time, the speed formula with a worked example, average speed for a journey with a stop, and the difference between scalar speed and vector velocity. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/p1-motion/speed-and-velocity.mp4?v=tntu3w 161 2026-11-01T14:11:56.842Z https://study.robustadev.com/igcse-co-ordinated-sciences/p1-motion/motion-graphs/ 2026-11-01T14:13:12.790Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/p1-motion/motion-graphs.jpg?v=tntu60 Motion graphs Reading distance-time graphs (gradient is speed, a flat line is stationary) and speed-time graphs (gradient is acceleration, area is distance), with the numbers worked out on screen. With Vietnamese subtitles. A “Check yourself” section with typed questions is below the video on the site. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/p1-motion/motion-graphs.mp4?v=tntu60 145 2026-11-01T14:13:12.790Z https://study.robustadev.com/igcse-co-ordinated-sciences/p1-motion/quiz/ 2026-11-01T14:28:42.776Z https://study.robustadev.com/posters/igcse-co-ordinated-sciences/p1-motion/quiz.jpg?v=tntuvu P1 quiz: motion Ten think-time questions on speed, average speed, scalars and vectors, distance-time graphs and speed-time graphs. https://study.robustadev.com/videos/igcse-co-ordinated-sciences/p1-motion/quiz.mp4?v=tntuvu 341 2026-11-01T14:28:42.776Z https://study.robustadev.com/practice/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/b4-workbook/ 2026-11-01T11:20:10.035Z https://study.robustadev.com/practice/b5-workbook/ 2026-11-01T11:20:10.038Z https://study.robustadev.com/practice/b1-vocab/ 2026-11-01T13:15:08.963Z https://study.robustadev.com/practice/b2-vocab/ 2026-11-01T13:15:08.963Z https://study.robustadev.com/practice/b3-vocab/ 2026-11-01T13:15:08.963Z https://study.robustadev.com/practice/b4-vocab/ 2026-11-01T11:45:10.339Z https://study.robustadev.com/practice/b5-vocab/ 2026-11-01T11:45:10.340Z https://study.robustadev.com/practice/check-what-are-enzymes/ 2026-11-01T11:49:15.220Z https://study.robustadev.com/practice/check-how-enzymes-work/ 2026-11-01T11:49:15.220Z https://study.robustadev.com/practice/check-temperature-and-ph/ 2026-11-01T11:49:15.221Z https://study.robustadev.com/practice/check-enzyme-investigation/ 2026-11-01T11:49:15.221Z https://study.robustadev.com/practice/check-photosynthesis/ 2026-11-01T11:49:15.222Z https://study.robustadev.com/practice/check-leaf-structure/ 2026-11-01T11:49:15.222Z https://study.robustadev.com/practice/check-leaf-experiments/ 2026-11-01T11:49:15.222Z https://study.robustadev.com/practice/check-rate-of-photosynthesis/ 2026-11-01T11:49:15.223Z https://study.robustadev.com/practice/check-mineral-ions/ 2026-11-01T11:49:15.223Z https://study.robustadev.com/practice/c1-vocab/ 2026-11-01T13:55:23.202Z https://study.robustadev.com/practice/p1-vocab/ 2026-11-01T13:55:23.204Z https://study.robustadev.com/practice/check-characteristics/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/check-classification/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/check-states-of-matter/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/check-diffusion/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/check-speed-and-velocity/ 2026-11-01T14:02:51.351Z https://study.robustadev.com/practice/check-motion-graphs/ 2026-11-01T14:02:51.351Z