Cycles Review

1
Cycles Review
2
When water turns in to water vapor while in the
heat of the sun, this is called

1. Condensation
2. Evaporation

3
What is required to turn water vapor into water?

1. Warmer Temperatures
2. Cooler Temperatures
3. Clouds

4
When plants lose water through tiny holes in
their leaves, this is called

1. Respiration
2. Evaporation
3. Transpiration

5
What is the name of the process in which bacteria
and fungi break down a dead organism?

1. Decomposition
2. Decay
3. Waste

6
In the nitrogen cycle, bacteria help change
nitrogen gas into what substance so that plants
can use it?

1. Nitrates
2. Nitrogen
3. Gas

7
What is the name of the process in which water
vapor is cooled and changed to liquid water?

1. Precipitation
2. Evaporation
3. Condensation

8
What is the name of the tiny openings in plants
through which water is released to the atmosphere?

1. Pores
2. Stomata
3. Roots

9
What gives a plant its energy to grow?

1. Water
2. Soil
3. Sun

10
What gas does a plant return to the atmosphere?

1. Oxygen
2. Carbon Dioxide
3. Nitrogen

11
What gas do animals exhale?

1. Nitrogen
2. Oxygen
3. Carbon Dioxide

12
What converts animal waste into nitrogen?

1. Bacteria
2. Decomposers
3. Both AB
4. None of the above

13
How do animals get most of the nitrogen they need
to live?

1. By eating plants
2. By going to the bathroom
3. By breathing the Nitrogen in the air

14
What causes water to evaporate?

1. Weather
2. Heat
3. Condensation

15
How much of the Earths atmosphere is Nitrogen?

1. 78
2. 21
3. 50

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What happens to nitrogen gas in the atmosphere
before it can be used?

1. It has to be used up
2. It has to be fixed or changed
3. It has to be decomposed

17
How much oxygen is in the earths atmosphere?

1. 78
2. 50
3. 21

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When water vapor cools and condenses in the air
what is formed?

1. Rain
2. Clouds
3. Snow

19
What do plants make from the nitrates in the soil?

1. proteins
2. bacteria
3. dirt

20
What do solid wastes return to the soil?

1. oxygen
2. nitrates
3. heat

21
What do liquid wastes return to the soil?

1. Nitrates
2. Ammonia
3. Oxygen

22
Water vapor changes to liquid during which stage
of the water cycle?

1. Precipitation
2. Condensation
3. Evaporation

23
Water is moved from the atmosphere to the Earths
surface during what stage of the water cycle?

1. Precipitation
2. Evaporation
3. Condensation

24
What two substances are returned to the soil in
animal waste?

1. Carbon and Oxygen
2. Decay and Waste
3. Nitrates and Ammonia

25
What do plants make proteins from?

1. Water on the leaves
2. Heat from the sun
3. Nitrates in the soil

26
What are fossil fuels made from?

1. Decayed Organisms
2. Rocks in the dirt
3. Waste from animals

27
What does burning fossil fuels in cars and
factories do to our atmosphere?

1. Lessons the amount of carbon dioxide
2. Adds more oxygen to the air
3. Adds too much carbon dioxide

28
When water droplets in the atmosphere become too
heavy to stay in clouds, what stage of the water
cycle occurs?

1. Evaporation
2. Condensation
3. Precipitation

29
What stage comes before condensation in the water
cycle?

1. Evaporation
2. Precipitation
3. Transfiguration

30
How do chemicals and pesticides get into our
groundwater supplies?

1. Bugs wastes
2. Through rain
3. Decay

31
What 2 things fix the nitrogen in the nitrogen
cycle?

1. Rain
2. Lightning and nitrogen fixing bacteria
3. Burning fossil fuels

32
What is ammonia a usable form of?

1. Oxygen
2. Nitrogen
3. Carbon Dioxide

33
Where does most (85) of the carbon dioxide in
our atmosphere come from?

1. Fossil Fuels
2. Carbon factories
3. Plants

34
What is one way that the balance of carbon in the
air is being set off balance?

1. Too many plants
2. Burning of fossil fuels
3. Not enough plants

35
What cycle do plants use carbon dioxide from the
atmosphere?

1. Photosynthesis
2. Carbon/Oxygen Cycle
3. Water Cycle

36
How does a forest fire affect the amount of
carbon in the air?

1. It kills trees
2. It increases the carbon dioxide
3. It decreases the carbon dioxide

37
Carbon is stored on Earth in what materials?

1. Rocks
2. Plants
3. Rocks and Fossil Fuels

38
What gas do animals release during respiration?

1. Nitrogen
2. Oxygen
3. Carbon Dioxide

39
What percent of the air is carbon dioxide?

1. 21
2. 78
3. Less than 1

40
Plants use carbon dioxide and release oxygen
during what process?

1. Condensation
2. Respiration
3. Photosynthesis

41
How do animals get most of the nitrogen they need
to live?

1. By eating plants and plant eating animals.
2. By eating dead organisms
3. By letting lightning strike them.

42
Which cycle moves H20 through the environment?

1. Carbon/Oxygen Cycle
2. Nitrogen Cycle
3. Water Cycle

43
Which cycle changes a gas into a usable form for
plants to use?

1. Carbon/Oxygen Cycle
2. Nitrogen Cycle
3. Water Cycle

44
Which cycle uses plants to turn a gas in the air
into a gas that animals can use?

1. Carbon/Oxygen Cycle
2. Nitrogen Cycle
3. Water Cycle

45
What are fossil fuels made from?

1. Rocks
2. Decayed organisms
3. Bacteria

46
Plants and animals use oxygen and release carbon
dioxide during what process?

1. Transfiguration
2. Respiration
3. Photosynthesis

47
Plants return water to the environment through
what process?

1. Stomata
2. Evaporation
3. Transpiration