Where did the salt in the oceans come from?

salt is dissolved from soil as water runs off the land, into the oceans

salt enters oceans from underwater volcanoes

What causes waves like tsunamis?

underwater earthquakes, volcanoes or asteroids

In which part of the ocean would salinity be lowest?

near a river delta where freshwater is entering

Which of the following is NOT true about oceans?

there is no danger of polluting oceans because they are so big.

they absorb energy from the sun

they heat the land in winter and cool it in summer

constantly moving currents move heat around the planet

What would cause salinity to increase?

precipitation and glaciers melting

Why did the egg in this demonstration float in the salty water (cup B)?

the salty water was more dense than the egg

the egg was more dense than the salty water

Cup B, with the floating egg, is an example of which type of ocean environment?

the Arctic Ocean with frozen ice caps

an area with lots precipitation

an area near the mouth of a river

Which of the following best describes waves?

Waves move energy through water.

Waves only move water on the surface.

Waves move lots of water around the planet.

As you go deeper into the ocean what happens to the amount of sunlight and the temperature?

sunlight increases and temperature decreases

sunlight decreases and temperature increases

The Arctic and Southern Oceans have ice caps because?

they receive less direct sunlight than other oceans

they have the lowest salinity of all the oceans

they are more dense than other oceans

they receive a lot of direct sunlight

Which of the following statements about sonar is NOT true?

when the sound is louder the ocean floor is shallow

scientists use sound waves (sonar) to map the ocean floor

when the ocean is shallow sound waves take less time to return

when the ocean is deep the sound waves take a long time to return

Unit 7 Oceans 2023

Authored by Brittany Dudek Williams

Science

6th - 8th Grade

NGSS covered

Used 3+ times

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35 questions

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is the biggest challenge for deep-sea explorers to overcome?

darkness

no oxygen

intense pressure

temperature

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which ocean zone has the biggest change in temperature and why?

surface zone, because of blowing winds

deep zone, because the extreme pressure freezes water

thermocline, because the water above blocks sunlight

deep zone, because it has scary fish

Which ocean zone receives the most sunlight and is the warmest?

thermocline zone

haliocline zone

surface zone

deep zone

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Why do currents move in curved paths?

because of the moon's gravity

wind blows them

the coriolis effect

because fish move it

Most of the water on Earth is______________

in rivers, lakes and streams

in the atmosphere

in oceans

frozen in glaciers and ice caps

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Oceans cover about ___% of Earth's surface.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is salinity?

amount of pollution in water

amount of sediment in water

amount of dissolved salt (sodium chloride) in water

how salty or how upset my friend is at me

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Unit 7 Oceans 2023

Which of the following is the biggest challenge for deep-sea explorers to overcome?

Which ocean zone has the biggest change in temperature and why?

Which ocean zone receives the most sunlight and is the warmest?

Why do currents move in curved paths?

Most of the water on Earth is______________

Oceans cover about ___% of Earth's surface.

What is salinity?

Where did the salt in the oceans come from?

What is the average salinity of Earth's oceans?

What causes waves like tsunamis?

Access all questions and much more by creating a free account

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