Chapter 2 Lesson 1 Planet Earth

Planets moving around the sun is called

• rotation

• gravity

• orbit

The imaginary line that goes through Earth's center from the North to South Poles is the

• Prime Meridian

• Equator

• axis

Earth traveling around the Sun takes 365 1/4 days. This process is called

• rotation

• revolution

Earth spinning on its axis takes 24 hours, this is called

• rotation

• revolution

What day is added to the calendar every leap year?

• March 29th

• February 29th

A leap year has how many days

• 365

• 366

• 180

How many layers of the Earth are there?

• 4

• 3

• 5

The inner part of the Earth is the

• crust

• mantle

• core

This layer of the Earth is about 1,800 miles thick.

• crust

• mantle

• core

This layer of the Earth that we walk on is the

• crust

• mantle

• core