8th Grade Physical Science GMAS Challenge

Front

What is ammonia represented by in chemical terms?

Back

NH₃

Front

What best describes ammonia?

Back

A compound

Front

What happens to gravitational attraction when two objects move away from each other?

Back

It decreases

Front

What is true about gravitational fields?

Back

Any object that has a mass is surrounded by a gravitational field.

Front

What must happen for a rocket to launch?

Back

The force of the engine must be greater than the force of gravity to produce a net force upward.

Front

What is convection?

Back

The transfer of heat through liquids and gases.

Front

What is conduction?

Back

The transfer of heat through solids.

Front

How does convection differ from conduction?

Back

Convection takes place only in liquids and gases, but conduction transfers heat in solids as well.

Front

What is gravitational force?

Back

The attraction between two objects with mass.

Front

What is the relationship between mass and gravitational force?

Back

Gravitational force increases with mass.