Particles and Conservation of Mass

What is matter made up of?

• Invisible particles

• Visible particles

• Solid objects

• Liquid substances

What happens to the particles in a solid when the temperature rises?

• They form tighter bonds

• They become gas

• They let go of their bonds

• They stop moving

Why can't you see sugar particles when dissolved in hot water?

• They become invisible

• They are too small to see

• They evaporate

• They change color

What phase change occurs when a liquid becomes a gas?

• Freezing

• Condensation

• Evaporation

• Melting

What is a mixture?

• A combination that changes ingredients

• A combination that does not change ingredients

• A new substance formed from two substances

• A solid dissolved in a liquid

What happens to the mass of a mixture before and after mixing?

• It increases

• It decreases

• It stays the same

• It doubles

What forms when iron comes into contact with water?

• A clear liquid

• A hard, gray metal

• A dry, flaky, red solid

• A gas