Three

Surface water currents are important because ________.

• maintain salinity levels in the ocean

• they distribute heat around the planet and influence climate

• distribute fresh water to northern latitudes

• none of these

Tags

NGSS.MS-ESS2-6

The ________________ is a term used to describe the global circulation pattern that connects the ocean surface currents and deep-water currents.

• Great Ocean Trade Winds Belt

• Great Ocean Downswelling Belt

• Great Ocean Thermohaline Belt

• Great Ocean Conveyor Belt

Tags

NGSS.MS-ESS2-6

Warm surface waters get depleted of nutrients and carbon dioxide, but they enrich again as they travel through _________ waters in the conveyor belt. The base of the world’s food chain depends on the cool, nutrient-rich waters that support algae and seaweed.

• shallow

• deep

• saline

• freshwater

Tags

NGSS.MS-ESS2-4

How does salt get into the ocean? Select ALL of the correct answers.

• the oceans have always been salty

• minerals have built up over millions of years.

• water from streams and rivers carried the salt and minerals to the ocean

• the breaking down of rocks

• underwater volcanoes and hydrothermal vents

Tags

NGSS.MS-ESS3-1

Why is the ocean water near the poles less salty than other places?

• There are fewer rivers and streams near the poles

• There are no rocks dissolving at the poles

• The salt freezes and becomes ice

• The glaciers are melting and releasing freshwater into the ocean

The density of water can be affected by temperature. When an amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. The warmer the water is, the more space it takes up, and the ____________ its density becomes.

• higher

• lower

• neither answer is correct

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In regions of the ocean where evaporation is higher, what happens to the seawater?

• density is higher

• density is lower

• the density does not change

Check all of the things that impact the density of seawater.

• Salinity

• Temperature

• Depth

• Ocean vents

When salt is dissolved in freshwater, the density of the water _________ because the mass of the water increases.

• increases

• decreases

• stays the same

Tags

NGSS.MS-PS1-2

When salt water’s temperature decreases (goes down), density _______.

• increases

• decreases

• stays the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4