2nd-9 9W: Science WEBWORK 12-20-24

Front

What state of matter has atoms that spread out and move freely?

Back

Gas

Front

What type of change is it when a substance changes its form but not its chemical composition?

Back

Physical change

Front

Why is Earth not a perfect sphere?

Back

Because as Earth rotates, the equator spins outward, much like the skirt of an ice skater, creating a bulge at the equator.

Front

What state of matter has particles that vibrate in place?

Back

Solid

Front

Why does the Sun rise in the East and set in the West?

Back

Because Earth rotates in a counter clockwise direction.

Front

What is the state of matter where particles are close together but can slide past each other?

Back

Liquid

Front

What is the process called when a solid turns into a liquid?

Back

Melting

Front

What is the process called when a liquid turns into a gas?

Back

Evaporation

Front

What is the term for the force that pulls objects toward each other?

Back

Gravity

Front

What is the main source of energy for Earth?

Back

The Sun