8th grade Fall Break Science Review

Where are earthquakes most likely to occur?

• In the middle of plates
• In the oceans
• Along plate boundaries
• Anywhere on the Earth

Why does the Earth orbit the Sun and not a planet in the solar system?

• The Sun is more massive than the planets so it's mass causes the gravitational pull.
• It just happened that way.
• The Earth pulls the Sun toward it  because it is so massive.
• The Earth is closer than the other planets so the distance causes the gravitational pull.

In order to be an index fossil the fossil must

• exist for a short period of time over a large area.
• exist for a long period of time over a small area.
• exist in spotty areas around the world.
• exist, die out,  and come back into existence.

Which is an example of erosion?

• water sitting in a well
• magma rising in a volcano
• wind blowing sand on a beach
• heat melting rock underground

P waves travel faster than S waves

• True

• False

Which picture correctly shows how S waves travel through the layers of the Earth?

• A

• B

Which picture correctly shows how P waves travel through the layers of the Earth?

• A

• B

Most of the Earth's volume is in the...

• 1

• 2

• 3

• 4

What is a PUSH or PULL of an object?

• Motion
• Force
• Friction
• Gravity

The sum of all forces acting on an object.

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force