space flashcard

Front

What does the red shift of galaxies suggest about the universe?

Back

The universe is expanding.

Front

Which state of matter is the least dense?

Back

Plasma.

Front

Which state of matter is the most dense?

Back

Solid.

Front

True or False: The moon gives off its own light.

Back

False.

Front

What are the light-colored, mountainous regions of the Moon called?

Back

Highlands.

Front

What is the primary reason for the red shift observed in distant galaxies?

Back

The galaxies are moving away from us, indicating the expansion of the universe.

Front

What is the state of matter that has a definite shape and volume?

Back

Solid.

Front

What is the state of matter that has a definite volume but takes the shape of its container?

Back

Liquid.

Front

What is the state of matter that has no definite shape or volume?

Back

Gas.

Front

What is plasma?

Back

A state of matter where gases are energized until atomic electrons are no longer associated with any particular atomic nucleus.