States of matter
15 review questions with answers for States of matter. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
State in which particles vibrate about fixed positions?
- Liquid
- Gas
- Plasma
- SolidRight answer
What this set covers
Solids, liquids and gases, and the names of each change of state. It also asks for melting and boiling points, the effect of impurities, diffusion, and what heating does to gas particles and pressure.
- Common mix-up
- Students often think the bonds inside molecules break when water boils, but the energy goes into overcoming forces between particles, which is why the temperature holds steady during boiling.
- Review tip
- Draw a heating curve for water, label each flat section, and write beside it what the added energy is doing to the particles there.
All 15 questions and answers
State in which particles vibrate about fixed positions?
Answer: Solid
State of a substance at 25 °C if it melts at −10 °C and boils at 80 °C?
Answer: Liquid
State of a substance at 25 °C if it melts at −200 °C and boils at −180 °C?
Answer: Gas
Change of state from liquid to solid?
Answer: Freezing
Change of state from gas to liquid?
Answer: Condensation
Change of state from solid straight to gas?
Answer: Sublimation
Temperature at which a pure solid turns into a liquid?
Answer: Melting point
Boiling point of pure water at sea level?
Answer: 100 °C
Melting point of pure ice?
Answer: 0 °C
Spreading of particles from high to low concentration?
Answer: Diffusion
A pure substance melts at…?
Answer: One fixed temperature
Effect of impurities on the melting point of a substance?
Answer: Lowers it
While water boils, its temperature stays constant because energy is overcoming…?
Answer: Forces between particles
Particles in a gas that is heated move…?
Answer: Faster
Effect on the pressure of a gas heated in a sealed container?
Answer: Increases
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.