Unit 1 Test: Big Bang, Stars, Atoms, and Elements

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What happens to a massive star after a supernova?

Back

If the core is massive enough, it can collapse into a black hole.

Front

What does blue shift indicate about a galaxy?

Back

A galaxy showing blue shift is moving towards us.

Front

What is the mass number of an atom?

Back

The mass number is the sum of the protons and neutrons in the nucleus of an atom.

Front

What new element is created when hydrogen is fused on the Sun?

Back

Helium is created when hydrogen is fused together on the Sun.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion of a star, marking the end of its life cycle.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is fusion in the context of stars?

Back

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

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.