Earth's Surfaces & Composition

What layer of the Earth do we live on?

• Crust

• Mantle

• Outer core

• Inner core

Which Earth layer is the very hot, dense center of our planet?

• Mantle

• Crust

• Core

• Mesosphere

Earth's layer BETWEEN the crust and the core is called?

• Crust

• Mantle

• Core

• Outer core

Land provides _______________ that humans, animals, and insects need to survive

• Oxygen

• Natural resources

• Fire

• Water

Land provides different ________for different animals and _________. Select 2 of the best answers

• habitats

• natural resource

• insects

• ecosystems

____________ is a tiny plant-like organism that lives in the sea – are responsible for at least _______ of the oxygen o Earth.

Select the 2 best answers

• phytoplankton

• 25%

• archaea

• 50%

___________ is all the different kinds of life you'll find in one area.

• habitat

• niche

• biodiversity

• location

______ of the Earth’s  surface is covered by water, this is why Earth is called, _______________

Select 2 of the best answers

• 80%

• The Green Planet

• 75%

• "The Blue Planet"

How long ago were Earth's oceans formed?

• 2 million years ago

• 100,000 years ago

• 500 years ago

• 4.6 billion years ago

What are the 3 main oceans on Earth? Select ALL that apply

• Indian Ocean

• Atlantic Ocean

• Arctic Ocean

• Pacific Ocean

• Southern Ocean