Grade 8 Quiz on Particles and Solubility

In a solid, the particles are _______ together and _______ in one place.

• packed

• fixed

In a gas, the particles are _______ apart and move _______ in all directions.

• far

• freely

Why can liquids change their shape to fit a container, but solids cannot?

Gases have particles that are close together.

• True

• False

Melting is when a solid becomes a liquid.

• True

• False

What happens at the boiling point?

• The temperature keeps going up.

• Energy is used to change the state of the substance.

• Particles stop moving.

• The substance becomes a solid.

Match the word with the meaning:

Freezing - (a)  

Melting - (b)  

Sublimation - (c)  

Condensing - (d)  

• Liquid becomes solid
• Solid becomes liquid
• Liquid becomes gas
• Gas becomes liquid

_______ means how much of something can dissolve in water.

When the water gets hotter, more things can _______.

Why does sugar dissolve faster in hot tea than in cold tea?