Modeling Matter Unit Review

Front

What are the particles that make up a liquid?

Back

Particles in a liquid are closely packed but can move around each other, allowing liquids to flow and take the shape of their container.

Front

What happens to the amount of water when it freezes into ice?

Back

The amount of water remains the same when it freezes; it changes from liquid to solid form.

Front

Why does hot air make a hot-air balloon rise?

Back

Hot air molecules move quickly and bounce off each other and the walls of the balloon, creating energy that makes the balloon rise.

Front

What evidence shows that a substance is still present in a mixture even if it can't be seen?

Back

If the weight of the powder plus the weight of the milk equals the weight of the mixture, it shows that the powder is still present.

Front

What indicates that a new substance has formed when mixing two substances?

Back

If the new substance has different properties than the original substances, it indicates that a new substance has formed.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

How do particles behave in a solid?

Back

In a solid, particles are tightly packed together and vibrate in place, giving solids a definite shape and volume.

Front

How do particles behave in a gas?

Back

In a gas, particles are far apart and move freely, filling the entire space of their container.

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of matter changes, but its composition remains the same.