Discovering Our Planet

What is the largest continent on Earth?

• Africa

• Australia

• North America

• Asia

What is the name of the planet we live on?

• Mars

• Earth

• Venus

• Jupiter

Which ocean is the largest on Earth?

• Pacific Ocean

• Atlantic Ocean

• Indian Ocean

• Arctic Ocean

What is the Earth's atmosphere made of?

• Hydrogen (50%), Helium (30%), and Carbon Dioxide (20%)

• Nitrogen (50%), Oxygen (30%), and Water Vapor (20%)

• The Earth's atmosphere is made of nitrogen (78%), oxygen (21%), and trace gases (1%).

• Ozone (60%), Argon (25%), and Methane (15%)

How many continents are there on Earth?

• 7

• 5

• 6

• 8

What is the term for the layer of gases surrounding Earth?

• atmosphere

• stratosphere

• troposphere

• exosphere

What is the main source of energy for Earth?

• Nuclear fusion

• The Moon

• The Sun

• Geothermal energy

What is the name of the imaginary line that divides the Earth into the Northern and Southern Hemispheres?

• Prime Meridian

• Equator

• International Date Line

• Tropic of Cancer

What do we call the process of water changing from liquid to vapor?

• Condensation

• Evaporation

• Freezing

• Sublimation

What is the name of the force that pulls objects toward the Earth?

• tension

• magnetism

• friction

• gravity