7th Grade Benchmark #2

Front

What happens to liquids when they are heated?

Back

Liquids expand when heated and contract when cooled.

Front

What type of energy is associated with electromagnetic waves?

Back

Electromagnetic energy.

Front

How does the Earth's magnetic field protect life?

Back

The magnetic field directs charged particles toward the poles and then past Earth.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

What happens to temperature as you move from the surface to the center of the Earth?

Back

Temperature increases.

Front

What is thermal energy?

Back

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

Front

What is the definition of a magnetic field?

Back

A magnetic field is the area around a magnet where magnetic forces can be detected.

Front

What is the difference between a series circuit and a parallel circuit?

Back

In a series circuit, components are connected end-to-end, while in a parallel circuit, components are connected across common points.

Front

What is the principle of thermal expansion?

Back

The principle that states that matter expands when heated and contracts when cooled.

Front

What is the role of charged particles in the Earth's atmosphere?

Back

Charged particles can affect weather patterns and are influenced by the Earth's magnetic field.