Grade 8 - Water in Nature

What is a plate tectonic?

• A type of ocean current

• A large-scale motion of Earth's lithosphere

• A type of marine animal

• A weather pattern

What happens at divergent boundaries?

• Plates move towards each other

• Plates slide past each other

• Plates move away from each other

• Plates remain stationary

What is a subduction zone?

• An area where two ocean currents meet

• A region where one tectonic plate moves under another

• A type of oceanic ridge

• A flat area on the ocean floor

What is a continental crust?

• The outermost layer of the ocean

• The thick part of the Earth's crust that forms the continents

• A type of oceanic trench

• A layer of the atmosphere

What percentage of Earth’s surface is covered by oceans?

• 30%

• 50%

• 70%

• 90%

What do oceanographers do?

• Study the stars

• Study the ocean and its processes

• Study the weather

• Study the Earth's core

Name the 5 ocean basins.

• Atlantic, Pacific, Indian, Southern, Arctic

• Atlantic, Pacific, Indian, Mediterranean, Black

• Atlantic, Pacific, Indian, Caspian, Red

• Atlantic, Pacific, Indian, Baltic, Caribbean

What is a continental divide?

• A type of ocean current

• A ridge that separates river systems flowing to different oceans

• A type of mountain range

• A deep ocean trench

What is a seismic wave?

• A type of ocean current

• A wave caused by underwater earthquakes

• A type of tidal wave

• A wave caused by wind

Why do tsunamis happen?

• Due to strong winds

• Because of underwater volcanic eruptions

• Due to the gravitational pull of the moon

• Because of ocean currents