Front

What type of galaxy has no defined pattern or shape?

Back

Irregular galaxy.

Front

What is the correct order for a star's formation?

Back

1. A large cloud of gas and dust exists. 2. Gravity pulls gas and dust together. 3. A protostar is formed. 4. Nuclear fusion begins.

Front

How old is our sun?

Back

About 10 billion years old.

Front

What type of galaxy is an active, young galaxy with a black hole at its center?

Back

Quasar.

Front

What type of galaxy is rounded but may be elongated and slightly flattened?

Back

Elliptical galaxy.

Front

What are the main components of a galaxy?

Back

Stars, gas, dust, and dark matter.

Front

What is a protostar?

Back

A protostar is an early stage in the formation of a star, where gas and dust are collapsing under gravity.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Front

What is the difference between spiral and elliptical galaxies?

Back

Spiral galaxies have a flat, rotating disk with arms, while elliptical galaxies are more rounded and lack distinct features.

Tags

NGSS.MS-ESS1-2

Front

What is a black hole?

Back

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