Water Cycle Theory Questions And Answers
1. Name three materials that are recycled by humans.
Answer:
· Cans
· Glass
· Paper
2. Name three materials that are recycled by nature.
Answer:
· Water
· Carbon
· Nitrogen
3. Mention three places water goes from into the air.
Answer:
· The oceans
· Rivers
· Lakes
4. Water falls from the air as
Answer: rain or snow.
5. Does rain or snow eventually find their way back into the ocean?
Answer: Yes.
6. Nature’s recycling program for water is called
Answer: the water cycle.
7. The water cycle is also known as
Answer: the hydrological cycle.
8. Name the four stages of the water cycle.
Answer:
· Storage
· Evaporation
· Precipitation
· Runoff
9. Most of Earth’s water is in the first stage of the water cycle. This stage is called
Answer: storage.
10. Name five storage areas of water on Earth.
Answer:
· Oceans
· Lakes
· Rivers
· Ice
· Underground
11. The majority of Earth’s water is stored in the
Answer: oceans.
12. Water goes from storage into the atmosphere by a process called
Answer: evaporation.
13. The air that surrounds the Earth is called
Answer: the atmosphere.
14. When water evaporates, it changes from a liquid into an invisible gas. The gas is called
Answer: water vapour.
15. Does water vapour go up into the atmosphere?
Answer: Yes.
16. Most of the water that gets into the air evaporates from the surface of the
Answer: oceans.
17. Does water also evaporate from rivers and lakes?
Answer: Yes.
18. Does water also go from ice caps and icebergs into the air?
Answer: Yes.
19. a) Ice changing into water vapour is called
Answer: sublimation.
b) Water can also evaporate from plants. This process is called
Answer: transpiration.
20. a) The return of water to Earth is
Answer: precipitation.
b) Water that falls to Earth is called
Answer: precipitation.
21. Does water return as rain, snow or other moisture?
Answer: Yes.
22. Name two materials that are required for precipitation to occur.
Answer:
· Liquid water
· Ice
23. Water vapour changes into tiny ice crystals or drops of water when the air gets cold enough. This process is called
Answer: condensation.
24. What are clouds?
Answer: Clouds are collections of tiny ice crystals or water droplets.
25. When the ice crystals or drops of water in a cloud get heavy enough, they fall to the Earth as
Answer: precipitation.
26. Mention four forms of precipitation.
Answer:
· Rain
· Snow
· Hail
· Sleet
27. Most precipitation falls into the oceans and goes right back into
Answer: storage.
28. a) Water that falls on land always flows from high places to lower places. This flow is called
Answer: runoff.
b) Water that falls on the ground but does not soak into the soil is known as
Answer: runoff.
c) Does runoff flow into streams?
Answer: Yes.
29. State whether each of the following statements about precipitation on land is true or false.
a) Precipitation that falls on land runs downhill.
Answer: True.
b) The water cuts channels as it flows.
Answer: True.
c) Some water seeps into the ground and can fill cracks between rocks.
Answer: True.
d) Underground water also flows from places that are full to places that have less water.
Answer: True.
30. a) Precipitation that sinks into the ground is called
Answer: groundwater.
b) Does water from land flow into streams?
Answer: Yes.
31. Do streams flow down mountains?
Answer: Yes.
32. Streams join together to make
Answer: rivers.
33. Water from rivers eventually flows into storage in the
Answer: ocean.
34. When does the water cycle start all over again?
Answer: After water from rivers flows into storage in the ocean.
35. Almost all water on Earth transfers from the Earth’s surface to the atmosphere and back in a continuous process called
Answer: the water cycle.