WorksheetsUnit 3 Review: Currents
Total questions: 30
Worksheet time: 7hrs 16mins
Which of the following is the main cause of currents at the surface of the ocean?
A difference in the density of ocean water at the
surface.
A difference in the spacing of the molecules of water.
Wind on the surface of the water.
Wind on nearby land formations.
Balloons filled with freshwater are put into a freshwater tank. What must be true of balloon A?
Balloon A is denser than Balloon B.
Balloon A is the same density as balloon B.
Balloon A is less dense than Balloon B.
There is no way to determine the density of balloon A.
What happens to the molecules in a water bottle when it is moved from shade to bright sunlight?
They move faster in the sunlight and slower in the shade.
They do not change their speed when moved to the sunlight.
They are not affected by the sunlight or the shade.
They move faster in the shade and slower in the sunlight.
If the water vapor (gas) inside a bottle turned into a liquid, what must have happened?
The water molecules lost heat energy.
The water molecules moved closer together.
The water molecules started slowing down.
All of the options.
What will happen when the water balloons are dropped into the tank of room temperature water?
Balloon A will float the highest.
Balloon B will float the highest.
Balloon C will float the highest.
All of the balloons will float at the same depth.
Clouds are forming over the ocean. What role does ocean water have in making these clouds?
The ocean water precipitates and turns into water vapor.
The ocean water cools the air.
The ocean water turns into a vapor and then condenses.
The ocean water warms the air.
What keeps the temperatures in England from being really cold in winter and hot in summer?
The ocean has very salty water.
The ocean absorbs the Sun's heat energy & releases it slowly.
The Atlantic Ocean is less salty than other oceans.
The ocean absorbs the Sun's heat energy & releases it fast.
What will happen to the drops of very hot, very salty green-colored water when they are added to the tank of cold, very salt water?
They will stay on the surface.
They will sink.
They will move to the middle.
They will mix with the water in the tank right away.
Which of the following is most likely to happen as a result of wind & temperature differences?
Water at D will move across the bottom to the pole & rise.
Water at B will sink & move across the bottom to the pole.
Water at C will rise & move across the surface to equator.
Water at A will sink & move across the bottom to the equator.
What will happen to drops of very hot, fresh green-colored water when they are added to the tank of cold, very salty water?
They will sink to the bottom of the tank.
They will stay on the surface of the water.
They will mix with the water in the tank right away.
They will move to the middle of the tank.
The 2 arrows show the direction of common ocean currents. Which chart best explains why?
A
B
C
D
Each of the balloons was filled with freshwater. What must be true of balloon A?
The water molecules are spaced farther apart in balloon A.
The water molecules are the same distance apart in A & B
The water molecules are spaced closer together in balloon A.
There is no way to tell anything about the water molecules.
Which of the following side views of the ocean best shows where water usually rises?
F
G
H
J
Why would droplets of water collect on the bottom side of the plastic cover?
The hot liquid water pushed upward in the cup.
The water vapor cooled and condensed.
The plastic lid attracted the water.
The water melted out of the plastic lid.
Which of the models best shows what the water molecules would look like if placed in the sun?
F
G
H
J
What must happen at step 2 in order for more clouds to form?
The water vapor must precipitate.
The water vapor must cool.
It must get warmer at high altitudes.
It must get sunnier during the day.
Why does the temperature in the air bottle go up more quickly than in the water bottle?
Molecules in water bottle absorb more energy before moving.
Molecules in air bottle can absorb more energy before moving.
There are fewer molecules in the water bottle to heat up.
There are more molecules in the air bottle to heat up.
Balloons filled with water are put in a tank of water. Which balloon(s) are the least dense?
Balloons W and Y
Balloon X
Balloon Y
Balloon Z
If you started with a cup of liquid water and that water turned into a gas, what happened?
Heat energy was removed from the liquid water molecules.
The gas water molecules were moving slower than the liquid.
Heat energy was added to the water molecules in the liquid.
The liquid water molecules were getting closer together.
Which one of the side views of the ocean best shows the direction water usually moves?
F
G
H
J
El nino results from a weakening of
Pacific Trade winds.
surface currents.
both Pacific trade winds and surface currents.
Several clouds are forming over the ocean near Earth's equator. Which of the following is true?
Molecules of ocean water are evaporating at the equator.
Water vapor from the ocean is condensing in air near equator.
Air containing water vapor is rising at the equator.
All of the above.
The 2 arrows show the direction of some ocean currents. Which statement could explain why?
Water at X is cooling and water at Y is getting warmer.
Water at X and water at Y are both cooling.
Water at X is getting warmer and water at Y is cooling.
Water at X and water at Y are both getting warmer.
Which statement would explain why balloon B is deeper than balloon A?
Molecules of water are packed more closely together in B
Molecules of water have more heat energy in balloon B.
Molecules of water are bigger in balloon A.
Molecules of water are moving faster in balloon B.
Where in the tank would the water molecules first spread farther apart?
A
B
C
D
Which of the following is the main cause of deep water currents?
A difference in the density of ocean water.
A difference in the spacing of the molecules of water.
Wind on the surface of the water.
Wind on nearby land formations.
Two balloons are put into a freshwater tank. What must be true?
Balloon B is denser than Balloon A.
Balloon B could be salt water & Balloon A fresh water.
Balloon A could be hot water and balloon B cold water.
All of the above.
Which balloon would contain room temperature water in a room temperature tank?
Balloons W and Y
Balloon X
Balloon Y
Balloon Z
Which balloon(s) would contain cold water in a room temperature tank?
Balloons W and Y
Balloon X
Balloon Y
Balloon Z
Gyres are a type of ...
deep ocean current.
ocean surface current.
both deep ocean and ocean surface current.
