7th Grade MID TERM Review

Front

What happens to the solubility of a gas in a liquid as the temperature increases?

Back

The solubility of a gas in a liquid decreases as the temperature increases.

Front

How does thermal energy move when an ice cube is placed onto a hot pan?

Back

Heat travels from the hot pan to the ice cube.

Front

What does a distance-time graph represent?

Back

A distance-time graph shows how the distance from a starting point changes over time.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What happens to the temperature of two objects in thermal contact?

Back

Energy is transferred from the hotter object to the cooler object until they reach equal temperature.

Front

Define solubility.

Back

Solubility is the ability of a substance to dissolve in a solvent at a given temperature and pressure.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What does it mean for a substance to be in equilibrium?

Back

Equilibrium occurs when the rates of forward and reverse processes are equal, resulting in no net change.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.