Earth

1. The earth's atmosphere consists of only 21 percent of this substance

• Carbon dioxide

• Nitrogen

• Oxygen

Average temperature (Fahrenheit) of the Earth's surface

• 57 degrees

• 56 degrees

• 58 degrees

Which gas helps the Earth's atmosphere block ultra violet light?

• Ozone

• Carbon dioxide

• Nitrogen

What percentage of the earth's atmosphere is only 10 miles from the surface of the planet?

• 91%

• 89%

• 90%

What protects the Earth from high-energy particles?

• Northern lights

• teardrop field

• magnetic field

About .... years ago, gravity coaxed Earth to form from the gaseous, dusty disk

that surrounded our young sun.

How many layers does the Еarth consist of?

• Four

• Five

• Three

• Six

What lies at the planet's heart?

• The rocky siblings

• Thick and denser

• The inner core

• The mantle

How is the top layer of the Earth called?

• Mantle

• Crust

• Outer core

• Inner core

Like ... and.... , Earth has mountains, valleys, and volcanoes.