Ocean Properties

What percent of the water on Earth is salt water?

• 3%

• 1%

• 50%

• 97%

Which of the following would DECREASE the salinity of water?

• Increased chemical weathering of rocks on land

• Water freezing, leaving behind salt

• Rain falling into the ocean

• Water evaporating, leaving behind salt

Tags

NGSS.MS-ESS2-4

Why are there warmer ocean temperatures by the equator?

• Because it gets more direct sunlight

• Because it gets less direct sunlight

• Because it faces the sun for fewer hours in a day

• Because the equator reflects more sunlight

Tags

NGSS.MS-ESS2-6

True or false: the ocean water at the bottom of the ocean is less dense than the ocean water at the surface of the ocean.

• True

• False

What is the thermocline?

• A horizontal space in water where temperature changes drastically

• A vertical space in water where temperature changes drastically

• A horizontal space in water where salinity changes drastically

• A vertical space in water where salinity changes drastically

This zone of the ocean gets the most sunlight, so it has the most plants that need to undergo photosynthesis.

• Surface Zone

• Transition Zone

• Deep Zone

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

This zone of the ocean is the largest zone by volume (has the biggest percent of ocean water)

• Surface Zone

• Transition Zone

• Deep Zone

This zone of the ocean contains the Thermocline.

• Surface Zone

• Transition Zone

• Deep Zone

Tags

NGSS.MS-ESS2-4

Where does the salt in the ocean come from? There are TWO correct answers.

• Magma from seafloor spreading

• Sediments from weathering and erosion

• Humans add it

• Animals add it

As we go deeper into the ocean, salinity ___________.

• Increases then decreases

• Decreases

• Increases

• Remains the same