Oceans Unit for Earth Space Science

How many oceans are there on Earth?

• 1

• 3

• 5

• 7

What causes ocean surface currents?

• Wind currents

• Earth's tilt

• Waves

• Volcanoes

Tags

NGSS.MS-ESS2-6

What causes convection currents that cause Deep ocean currents to move around the globe?

• Wind currents

• Earth's tilt

• Density differences

• Volcanoes

Tags

NGSS.MS-ESS2-6

What does salinity measure?

• ocean temperature

• amount of salt in water

• ratio of mass to volume

What are the two main ocean currents called?

• Surface Currents

• Coriolis Effect

• Deep Ocean Currents

• Wind Currents

Tags

NGSS.MS-ESS2-6

What is the most abundant salt in sea water?

• sodium chloride

• magnesium chloride

• calcium chloride

• potassium chloride

Which of the following is not a process that decreases the salinity of seawater?

• runoff from land

• icebergs melting

• precipitation

• evaporation

What happens to density as the ocean water goes down in depth?

• increases

• decreases

• stays the same

Approximately what percentage of Earth's surface is covered by oceans?

• 40%

• 50%

• 60%

• 70%

Tags

NGSS.MS-ESS2-4

Warm ocean currents generally come from

• The North Pole
• The South Pole
• The Equator
• Both A and B

Tags

NGSS.MS-ESS2-6