OCR Unit 2 Lesson 2 Making Waves

How are surface currents in the ocean formed?

• by blowing wind

• by temperature changes

• by differences in salinity

• by Earth’s rotation

Which sentence from the selection best supports your answer for surface currents in the ocean being formed by the wind blowing?

• Earth’s rotation also forms currents.

• Salinity is the amount of salt in the water.

• Wind forms surface currents.

• Ocean currents usually follow a pattern like air currents high in the atmosphere.

Tags

CCSS.RI.5.8

CCSS.W.5.9A

Air and water are alike in that

• they both carry nutrients that fish need.

• they both freeze at the same temperature.

• they both weigh about the same.

• they both rise when heated.

The author wrote this selection to

• persuade the reader to visit the ocean.

• inform readers about ocean currents.

• express an opinion about ocean trash.

• entertain the reader with a scary story.

The rotation of Earth causes ocean currents to

• rise to the surface or fall down.

• bend to the left or right.

• move from warm to cold areas.

• become more or less salty.

What does a conveyor belt do?

• holds things in place so they don’t fall

• blocks sunlight so it doesn’t cause things to fade

• moves things from one place to another

• forms a border that keeps things from moving freely

amount of salt in water

• salinity

• gyre

• whirlpool

• eddy

How is a gyre like a pot of chicken soup?

• Both involve a swirling motion.

• Both are related to cooking.

• Both are types of food.

• Both are found in the ocean.

Tags

CCSS.RI.5.5

How do currents regulate the temperature of Earth?

• By distributing heat from the equator to the poles

• By increasing the Earth's core temperature

• By blocking sunlight from reaching the surface

• By causing volcanic eruptions

Tags

CCSS.RI.5.3

How does trash get into gyres?

• Through ocean currents and polution

• By human intervention

• Due to marine life

• From underwater volcanoes

Tags

CCSS.RI.5.9