Unit 7 Oceans 2023

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

• darkness
• no oxygen
• intense pressure
• temperature

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

Tags

NGSS.MS-ESS2-6

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

• thermocline zone
• haliocline zone
• surface zone
• deep zone

Why do currents move in curved paths?

• because of the moon's gravity
• wind blows them
• the coriolis effect
• because fish move it

Tags

NGSS.MS-ESS2-6

Most of the water on Earth is______________

• in rivers, lakes and streams
• in the atmosphere
• in oceans
• frozen in glaciers and ice caps

Oceans cover about ___% of Earth's surface.

• 97
• 23
• 70
• 25

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

Where did the salt in the oceans come from?

• salt enters oceans from underwater volcanoes
• oceans have always been salty
• salt is dissolved from soil as water runs off the land, into the oceans
• from many years of evaporation

What is the average salinity of Earth's oceans?

• 0.25
• 0.96
• 0.035
• 0.7

What causes waves like tsunamis?

• hurricanes and tornadoes
• thunderstorms
• underwater earthquakes, volcanoes or asteroids
• differences in density

Tags

NGSS.MS-ESS2-3