8th Grade Physical Science GMAS Challenge

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. It is often associated with the height of an object above the ground.

Front

Which object has the most potential energy when placed at the same height?

Back

The object with the greatest mass has the most potential energy when at the same height.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

Give an example of a pure substance.

Back

A sample of oxygen gas is an example of a pure substance.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.

Front

How many protons does an atom of potassium have?

Back

An atom of potassium has 19 protons.

Front

What is sound?

Back

Sound is a type of energy made by vibrations. It travels through different media such as solids, liquids, and gases.

Front

In which medium do sound waves travel fastest?

Back

Sound waves travel fastest in solids, such as solid iron.

Front

What is a generator?

Back

A generator is a device that converts mechanical energy into electrical energy.

Front

How does a generator work?

Back

A generator works by using mechanical energy to move a conductor through a magnetic field, producing electricity.