The Earth planet

How old is the Earth?

• 4.5 thousand years

• 4.5 million years

• 4.5 billion years

• 4.5 hundred years

Answer explanation

Scientists believe that earth was formed about 4.5 billion years ago, nearly at the same time as the rest of the solar system was formed.

What are the four layers that make up the Earth?

• Inner core, outer core, mantle, crust

• Core, mantle, crust, atmosphere

• Solid core, liquid core, mantle, crust

• Inner core, outer core, rocky core, atmosphere

Answer explanation

What is the temperature of the inner core of the Earth?

• 1000 degrees Celsius

• 5500 degrees Celsius

• 4900 degrees Celsius

• 5200 degrees Celsius

How far is the Earth from the Sun?

• 100 million miles (160 934 400 km)

• 50 million miles (80 467 200 km)

• 93 million miles (149 668 992 km)

• 200 million miles (321 868 800 km)

Answer explanation

Why the Earth can have water in its three states (liquid, gas, ice)?

• Because of its distance from the Sun

• Because of its balanced climatic condition

• Because of its rocky outer crust

• Because of its atmosphere

What are some missions of the Earth's atmosphere?

• Protecting the Earth from radiations of the sun, asteroids, regulating the climate

• Protecting the Earth from hurricanes, comets, regulating the temperature

• Protecting the Earth from earthquakes, meteors, regulating the oxygen levels

• Protecting the Earth from tornadoes, satellites, regulating the humidity

What is our responsibility towards the Earth?

• To destroy it

• To pollute it

• To protect it

• To ignore it