C1 quiz: particulate matter
Ten think-time questions on solids, liquids and gases, the changes of state, the heating curve, diffusion and particle mass.
Transcript
Ten quick questions on states of matter and diffusion. Listen, think, then check your answer.
Question one. In a solid the particles: A, are far apart and move fast. B, touch and vibrate in fixed positions. Or C, touch and slide past each other.
The answer is B, touch and vibrate in fixed positions. The particles of a solid touch in a pattern. They only vibrate on the spot.
Question two. Which state of matter has no fixed shape but a fixed volume? A, solid. B, liquid. Or C, gas.
The answer is B, liquid. A liquid takes the shape of its container. Its volume stays the same.
Question three. Why is a gas easy to compress? A, the particles are very small. B, there is a lot of space between the particles. Or C, the particles are heavy.
The answer is B, there is a lot of space between the particles. The particles of a gas are far apart. They can be pushed closer together.
Question four. Melting is the change of state from: A, liquid to gas. B, solid to liquid. Or C, gas to liquid.
The answer is B, solid to liquid. Melting is solid to liquid. Freezing is the reverse.
Question five. Condensation is the change of state from: A, gas to liquid. B, liquid to solid. Or C, solid to gas.
The answer is A, gas to liquid. Condensation is gas to liquid. Boiling is the reverse.
Question six. A solid changes straight into a gas. This is called: A, evaporation. B, sublimation. Or C, boiling.
The answer is B, sublimation. Sublimation skips the liquid state. Dry ice is an example.
Question seven. Evaporation happens: A, at the surface of a liquid, below the boiling point. B, throughout the liquid, at the boiling point. Or C, only in a solid.
The answer is A, at the surface of a liquid, below the boiling point. Evaporation is at the surface. Boiling is throughout the liquid.
Question eight. Why is the temperature flat while ice is melting? A, the heater is switched off. B, the energy is used to separate the particles. Or C, the ice is cooling down.
The answer is B, the energy is used to separate the particles. The energy is used to separate the particles. So the temperature does not rise.
Question nine. Diffusion is the net movement of particles from: A, low to high concentration. B, high to low concentration. Or C, cold to hot places.
The answer is B, high to low concentration. Particles spread from where there are many. They move to where there are few.
Question ten. Ammonia particles are lighter than hydrogen chloride particles. So ammonia diffuses: A, faster. B, more slowly. Or C, at the same speed.
The answer is A, faster. Lighter particles move faster. So they diffuse faster.
Quiz complete. Review any topic you missed, and watch the video again.
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