8.9 Unit Assessment

Front

What color do objects appear if they are moving away from us?

Back

red

Front

What is the name of the explosion that occurs when a massive star reaches the end of its life cycle?

Back

Supernova

Front

Why does our Sun appear larger than other stars?

Back

It's closer to Earth than other stars.

Front

What is the Doppler Effect?

Back

A change in frequency due to the relative motion of a wave source and an observer.

Front

What is the current understanding of the movement of galaxies?

Back

The galaxies are moving away from us.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion of a star.

Front

How does distance affect the appearance of stars?

Back

Stars that are closer appear larger and brighter than those that are farther away.

Front

What happens to light from objects moving away from us?

Back

The light is redshifted, meaning it shifts towards the red end of the spectrum.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from an observer is shifted to longer wavelengths.

Front

What is the significance of the Doppler Effect in astronomy?

Back

It helps astronomers determine whether objects in space are moving towards or away from us.