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Particles

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Q1. What is the smallest particle of a substance

called?

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A1. Atom

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Q2. What is a group of chemically combined

atoms called?

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A2. Molecule

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Q3. What do you call an empty volume of space?

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A3. Vacuum

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Q4. What is the form of energy due to molecular

motion called?

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A4. Heat

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Q5. What do you call the change of state from

solid to liquid?

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A5. Melting

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Q6. What do you call the change of state from

liquid to gas?

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A6. Boiling

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Q7. What do you call the change of state from gas

to liquid?

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A7. Condensation Condense

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Q8. What do you call the change of state from

liquid to solid?

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A8. Freezing Freeze

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Q9. Why does the water level in a glass near a

warm radiator go down?

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A9. Evaporation Evaporate

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Q10. What do you call the movement of one

substance through another substance?

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A10. Diffusion

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Q11. What is the measure of how hot or

cold a substance called?

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A11. Temperature

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Q12. What is force divided by area called?

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A12. Pressure

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