https://study.robustadev.com/ 2026-11-01T13:32:55.212Z 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/ 2026-11-01T13:32:55.212Z https://study.robustadev.com/igcse-co-ordinated-sciences/b1-classification/ 2026-11-01T13:24:58.495Z 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-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/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/practice/ 2026-11-01T13:15:08.963Z 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