Earth and Space Science Unit 1 Astronomy Review

Front

What is the primary process that generates energy in the Sun's core?

Back

Nuclear fusion

Front

During nuclear fusion in the Sun, hydrogen nuclei combine to form which element?

Back

Helium

Front

What stage of life is our Sun currently in?

• Protostar
• Red giant
• Main sequence
• White dwarf

Back

Main sequence

Front

As the Sun ages, it will eventually expand into a:

Back

Red giant

Front

What determines the end stage of a star’s life cycle?

Back

The mass of the star

Front

What happens to a massive star after it has exhausted its nuclear fuel and undergoes a supernova explosion?

Back

It becomes a black hole or neutron star

Front

The cosmic microwave background radiation is best described as:

• A type of sound wave
• The light from nearby stars
• Leftover energy from the Big Bang
• Light from black holes

Back

Leftover energy from the Big Bang

Front

What does the redshift of light from distant galaxies indicate?

Back

The galaxies are moving away

Front

In which part of a star does nuclear fusion primarily occur?

Back

The core

Front

Newton’s Law of Universal Gravitation states that the gravitational force between two objects depends on their masses and:

• Their speed
• The distance between them
• Their volume
• The temperature

Back

The distance between them