Popcorn pops because each kernel contains water. As you

heat popcorn, the water molecules inside each kernel move ____________________.

The reasons that a popcorn kernel pops are the same reasons that a balloon shrinks and expands as the molecules inside of it are heated and ___________________.

What happens inside a balloon and what happens inside a popcorn kernel can both be explained by knowing the behavior of ______________________.

Longer arrows mean the particles are moving _________________. Shorter arrows mean they are moving more slowly.

A balloon can stretch if something pushes against it. As the

gas particles push the balloon, they make the ______________ stretch, and it gets larger.

As more gas is added to a balloon, the pressure against the sides of the balloon increases. The gas particles move further apart and push against the sides of the ___________.

If you put more gas into a balloon than it

can stretch to hold, the balloon will ________________.

If you tie a balloon shut and then put it in ice, the particles slow down. They do not have as much __________________.

Molecules spread all over the space inside the balloon, not just in the center or in any other spot.

Air _________________ is caused by the number of molecules hitting the sides of a container (number of collisions per square inch [psi]).

The particle model of matter provides a mechanism for understanding the relationship between the changes in the kinetic energy of molecules and changes in ________________.

Dry ice has a freezing point well below 0°C. Only handle dry ice wearing gloves or oven mitts, or using a cloth. Do not let students handle _________ ______________.

The balloon warms up when removed from the dry ice.

The molecules inside the balloon (at _______________ temperature) have more energy and collide more strongly, pushing the balloon harder.

If the room stays at the same warm temperature, the molecules inside the balloon and outside the _____________ would move the same way.

If the room started to cool off, the molecules would slow down, and the balloon would get ____________.

If the room started to warm up, the molecules would move faster, and the _________________ would get bigger.

Hot glass looks the same as cold glass.

When a solid changes its phase and turns into a gas it is known as

A phase or state of matter in which a substance has NO definite shape or volume.

The process by which a liquid turns into a gas.

Solid, liquids, and gases.

A phase or state of matter in which a substance has a definite shape and volume.

A phase or state in which a substance has a definite volume but NO definite shape.

The process of molecules moving faster, leaving the liquid, and becoming a gas is called evaporation.

During evaporation, molecules at the surface of a liquid gain enough energy to go into the gas phase/state.

Carbon

A measure of how much matter an object has is--

The measurement of the force of gravity on an object is the object's _____________.

This is a _______________.

This is a __________.

What is the freezing point of water?

What is the boiling point of water?

What is the definition of sublimation?

What is an example of sublimation?