7th Grade Winter Break Review

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces are combined.

Front

How do you calculate net force?

Back

Net force is calculated by subtracting the opposing forces from each other.

Front

What is the formula for density?

Back

Density = mass / volume.

Front

What happens to speed when friction increases?

Back

More friction decreases speed.

Front

What season is the northern hemisphere experiencing when tilted towards the sun?

Back

Summer.

Front

What is the effect of gravity on objects?

Back

Gravity pulls objects towards the center of the Earth.

Front

What is the unit of force?

Back

The unit of force is Newton (N).

Front

What is the relationship between mass and volume in density?

Back

Density is the ratio of mass to volume.