Phase Changes

What is evaporation?

• The process where a liquid turns into a gas when it gains heat.

• The process where a solid turns into a liquid when it gains heat.

• The process where a gas turns into a liquid when it loses heat.

• The process where a liquid turns into a solid when it loses heat.

What is the difference between a solid, liquid, and gas?

• Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither definite shape nor volume.

• Solids can flow, liquids have a definite shape, and gases have a definite volume.

• Solids are compressible, liquids have a fixed shape, and gases have a definite volume.

• Solids have no shape, liquids have a definite shape, and gases have a definite volume.

What happens during freezing?

• The process where a liquid turns into a solid when it loses heat.

• The process where a solid turns into a liquid when it gains heat.

• The process where a gas turns into a liquid when it cools down.

• The process where a liquid turns into a gas when it gains heat.

What happens during melting?

• The process where a solid turns into a liquid when it absorbs heat.

• The process where a liquid turns into a solid when it loses heat.

• The process where a gas turns into a liquid when it cools down.

• The process where a solid remains unchanged regardless of temperature.

What is a liquid?

• A solid state of matter that maintains a fixed shape.

• A state of matter that flows and can take the shape of its container.

• A gaseous state of matter that has no fixed volume.

• A state of matter that is neither solid nor gas, but a mixture of both.

What is a solid?

• A state of matter that keeps its shape because its molecules only move in place, not around each other.

• A state of matter that flows and takes the shape of its container.

• A state of matter that has no definite shape and expands to fill its container.

• A state of matter that can be compressed and has a definite volume.

What is sublimation?

• The process where a solid turns directly into a gas without becoming a liquid first.

• The process where a gas turns into a liquid.

• The process where a liquid turns into a solid.

• The process where a solid turns into a liquid.

What is deposition?

• The process where a gas turns directly into a solid without becoming a liquid first.

• The process where a solid turns into a liquid.

• The process where a liquid turns into a gas.

• The process where a gas turns into a liquid.

What is temperature?

• A measure of how hot or cold something is.

• A measure of the speed of molecules in a substance.

• A measure of the amount of heat energy in an object.

• A measure of the pressure exerted by gases.

What is the boiling point?

• The temperature at which a liquid turns into a gas.

• The temperature at which a solid melts into a liquid.

• The temperature at which a gas condenses into a liquid.

• The temperature at which a liquid freezes into a solid.