continents and oceans
How many continents are there on Earth?
7
Which part of Earth covers the most space: land, water, or air?
Water
What number planet is Earth from the Sun?
third
What tool helps us know direction on a map?
a compass rose
Name one thing Earth has that makes it able to support life.
water, or air, or the right temperature
Name the ocean that is the largest and deepest.
the Pacific Ocean
What is the name for the solid outer layer of Earth?
Crust
What shape is Earth?
What is a map key (or legend) used for?
to explain the symbols on a map
What part of Earth protects us from harmful space radiation?
the atmosphere
Which continent is home to the Sahara Desert
Africa
What gas do humans need to breathe?
Name one planet that is smaller than Earth.
Mercury or Mars
Which lines go east to west on a map?
Latitude lines
Why is liquid water important for life?
because it hydrates all living things and is needed for biological processes
Which continent is completely covered in ice
Antarctica
What type of water is found in oceans and seas?
Saltwater
What keeps Earth in orbit around the Sun?
Gravity
Which imaginary line divides Earth into the Northern and Southern Hemispheres?
the Equator
What gas in the air do plants use to make oxygen?
carbon dioxide
Name all 5 oceans
the Pacific, Atlantic, Indian, Arctic, and Southern Ocean
What do scientists call the layer of gases that surrounds Earth?
Atmosphere
Why does Earth have day and night?
because Earth rotates on its axis
What type of map would you use to see mountains and rivers?
a physical map
Explain one way land, water, and air work together to support life
Plants grow in soil (land), use water to grow, and take in carbon dioxide from the air to make oxygen.