Front

What are main sequence stars primarily made of?

Back

Hydrogen and Helium

Front

What happens during nuclear fusion?

Back

Smaller atoms are forced together to create larger atoms, releasing energy.

Front

How are elements heavier than Iron formed?

Back

They form when a red super giant explodes as a supernova.

Front

What can be exchanged with the surroundings in a CLOSED SYSTEM?

Back

Energy

Front

What does the Big Bang theory suggest about the universe?

Back

The universe is continually expanding.

Front

What is a star's life cycle?

Back

The life cycle of a star includes stages: nebula, main sequence, red giant/supergiant, and supernova or white dwarf.

Front

What is a nebula?

Back

A nebula is a giant cloud of gas and dust in space, where stars are born.

Front

What is a supernova?

Back

A supernova is a powerful explosion that occurs at the end of a star's life cycle.

Front

What is the role of gravity in star formation?

Back

Gravity pulls together gas and dust in a nebula to form a star.

Front

What is a red giant?

Back

A red giant is a late stage in a star's life cycle where it expands and cools after exhausting its hydrogen fuel.