1st Semester Spiral Review #1

Front

What is a star born from?

Back

A star is born when nuclear fusion starts.

Front

What are magnetic force and gravitational force examples of?

Back

Non-contact forces.

Front

What do all electromagnetic waves have in common?

Back

They all have the same speed.

Front

Why does a compass needle point north?

Back

It lines up with the Earth's magnetic field.

Front

What is a key feature of electromagnets?

Back

They can be turned on and off.

Front

What is nuclear fusion?

Back

A process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

Define non-contact forces.

Back

Forces that act at a distance without physical contact, such as gravitational and magnetic forces.

Front

What is the speed of light in a vacuum?

Back

Approximately 299,792 kilometers per second (or about 186,282 miles per second).

Front

What is the relationship between frequency and wavelength in electromagnetic waves?

Back

They are inversely related; as frequency increases, wavelength decreases.

Front

What is a protostar?

Back

A protostar is a young star that is still in the process of forming and has not yet begun nuclear fusion.