Unit 3/4 Space

Front

What does an H-R diagram show about stars?

Back

An H-R diagram shows the brightness and temperature of stars.

Front

In which stage of their life cycle are our sun and most stars?

Back

Our sun and most stars are in the Main Sequence stage.

Front

What is a black hole?

Back

A black hole is a region in space where a star's gravitational pull is so strong that not even light can escape.

Front

What marks the birth of a star?

Back

A star is born when it begins nuclear fusion.

Front

What type of galaxy is the Milky Way?

Back

The Milky Way Galaxy is a spiral galaxy.

Front

What are the main components of an H-R diagram?

Back

The main components of an H-R diagram are the axes representing luminosity (brightness) and temperature of stars.

Front

What is the significance of the Main Sequence in stellar evolution?

Back

The Main Sequence is the longest stage in a star's life cycle where it fuses hydrogen into helium.

Front

What happens to a star after it exhausts its hydrogen fuel?

Back

After exhausting hydrogen fuel, a star may expand into a red giant and eventually shed its outer layers.

Front

What is the process of nuclear fusion in stars?

Back

Nuclear fusion in stars is the process where hydrogen nuclei combine to form helium, releasing energy.

Front

What are the characteristics of a spiral galaxy?

Back

Spiral galaxies have a flat, rotating disk containing stars, gas, and dust, along with a central concentration of stars known as the bulge.