Universe Unit Review

Front

What are electromagnetic (EM) waves?

Back

Electromagnetic waves are waves of energy that travel through space and do not require a medium. They include radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Front

Which EM waves have the longest wavelength?

Back

Radio waves have the longest wavelength in the electromagnetic spectrum.

Front

What are meteors?

Back

Meteors are small pieces of rock or metal that burn up upon entering Earth's atmosphere, creating a streak of light often referred to as a 'shooting star'.

Front

What is a protostar?

Back

A protostar is the first stage in the life cycle of a star, where gas and dust in space begin to collapse under gravity, forming a dense core.

Front

Which EM waves have a shorter wavelength than visible light?

Back

X-rays have a shorter wavelength than visible light.

Front

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

Back

The northern hemisphere experiences summer when it is tilted towards the sun.

Front

What is the main sequence in a star's life cycle?

Back

The main sequence is the longest stage in a star's life cycle where it fuses hydrogen into helium in its core, producing energy.

Front

What are asteroids?

Back

Asteroids are small rocky bodies that orbit the sun, primarily found in the asteroid belt between Mars and Jupiter.

Front

What is the difference between meteoroids and asteroids?

Back

Meteoroids are smaller than asteroids and are often fragments of asteroids or comets that can enter Earth's atmosphere.

Front

What is a supernova?

Back

A supernova is a powerful explosion that occurs at the end of a star's life cycle, resulting in the star's dramatic increase in brightness.