cycles of matter

evaporation sublimation and transpiration

Water changes to a gas by three different processes called evaporation, sublimation, and transpiration. Evaporation takes place when water on Earths surface changes to water vapor. The sun heats the water and gives water molecules enough energy to escape into the atmosphere. Most evaporation occurs from the surface of the ocean. Sublimation takes place when snow and ice on Earths surface change directly to water vapor without first melting to form liquid water. This also happens because of heat from the sun. Transpiration takes place when plants release water vapor through pores in their leaves called stomata.

water cycle

Water is an extremely important aspect of every ecosystem. Life cant exist without water. Most organisms contain a large amount of water, and many live in water. Therefore, the water cycle is essential to life on Earth. Water on Earth is billions of years old. However, individual water molecules keep moving through the water cycle. The water cycle is a global cycle. It takes place on, above, and below Earths surface, as shown in Figure 24.7. During the water cycle, water occurs in three different states: gas (water vapor), liquid (water), and solid (ice). Many processes are involved as water changes state to move through the cycle. Watch this video for an excellent visual introduction to the water cycle: . MEDIA Click image to the left or use the URL below. URL:

textbook_image

carbon exchange pools

Major exchange pools of carbon include organisms and the atmosphere. Carbon cycles more quickly between these components of the carbon cycle. Photosynthesis by plants and other producers removes carbon dioxide from the atmosphere to make organic compounds for living things. Cellular respiration by living things releases carbon into the atmosphere or ocean as carbon dioxide. Decomposition of dead organisms and organic wastes releases carbon back to the atmosphere, soil, or ocean.

biogeochemical cycles

The chemical elements and water that are needed by living things keep recycling on Earth. They pass back and forth through biotic and abiotic components of ecosystems. Thats why their cycles are called biogeochemical cycles. For example, a chemical element or water might move from organisms (bio) to the atmosphere or ocean (geo) and back to organisms again. Elements or water may be held for various periods of time in different parts of a biogeochemical cycle. An exchange pool is part of a cycle that holds a substance for a short period of time. For example, the atmosphere is an exchange pool for water. It usually holds water (as water vapor) for just a few days. A reservoir is part of a cycle that holds a substance for a long period of time. For example, the ocean is a reservoir for water. It may hold water for thousands of years. The rest of this lesson describes three biogeochemical cycles: water cycle, carbon cycle, and nitrogen cycle.

condensation and precipitation

Rising air currents carry water vapor into the atmosphere. As the water vapor rises in the atmosphere, it cools and condenses. Condensation is the process in which water vapor changes to tiny droplets of liquid water. The water droplets may form clouds. If the droplets get big enough, they fall as precipitation. Precipitation is any form of water that falls from the atmosphere. It includes rain, snow, sleet, hail, and freezing rain. Most precipitation falls into the ocean. Eventually, this water evaporates again and repeats the water cycle. Some frozen precipitation becomes part of ice caps and glaciers. These masses of ice can store frozen water for hundreds of years or even longer. Condensation may also form fog or dew. Some living things, like the lizard in Figure 24.8, depend directly on these sources of liquid water.

textbook_image

runoff and groundwater

Precipitation that falls on land may flow over the surface of the ground. This water is called runoff. It may eventually flow into a body of water. Some precipitation that falls on land soaks into the ground. This water becomes groundwater. Groundwater may seep out of the ground at a spring or into a body of water such as the ocean. Some groundwater is taken up by plant roots. Some may flow deeper underground to an aquifer. An aquifer is an underground layer of rock that stores water. Water may be stored in an aquifer for thousands of years.

carbon cycle

The element carbon is the basis of all life on Earth. Biochemical compounds consist of chains of carbon atoms and just a few other elements. Like water, carbon is constantly recycled through the biotic and abiotic factors of ecosystems. The carbon cycle includes carbon in sedimentary rocks and fossil fuels under the ground, the ocean, the atmosphere, and living things. The diagram in Figure 24.9 represents the carbon cycle. It shows some of the ways that carbon moves between the different parts of the cycle. You can see an animated carbon cycle at this link: http://commons.w

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carbon reservoirs

Major reservoirs of carbon include sedimentary rocks, fossil fuels, and the ocean. Sediments from dead organisms may form carbon-containing sedimentary rocks. Alternatively, the sediments may form carbon-rich fossil fuels, which include oil, natural gas, and coal. Carbon can be stored in these reservoirs for millions of years. However, if fossil fuels are extracted and burned, the stored carbon enters the atmosphere as carbon dioxide. Natural processes, such as volcanic eruptions, can also release underground carbon from rocks into the atmosphere. Water erosion by runoff, rivers, and streams dissolves carbon in rocks and carries it to the ocean. Ocean water near the surface dissolves carbon dioxide from the atmosphere. Dissolved carbon may be stored in the deep ocean for thousands of years.

nitrogen cycle

Nitrogen is another common element found in living things. It is needed to form both proteins and nucleic acids such as DNA. Nitrogen gas makes up 78 percent of Earths atmosphere. In the nitrogen cycle, nitrogen flows back and forth between the atmosphere and living things. You can see how it happens in Figure 24.10. Several different types of bacteria play major roles in the cycle. Animals get nitrogen by eating plants or other organisms that eat plants. Where do plants get nitrogen? They cant use nitrogen gas in the air. The only form of nitrogen that plants can use is in chemical compounds called nitrates. Plants absorb nitrates through their roots. This is called assimilation. Most of the nitrates are produced by bacteria that live in soil or in the roots of plants called legumes. Nitrogen-fixing bacteria change nitrogen gas from the atmosphere to nitrates in soil. When organisms die and decompose, their nitrogen is returned to the soil as ammonium ions. Nitrifying bacteria change some of the ammonium ions into nitrates. The other ammonium ions are changed into nitrogen gas by denitrifying bacteria.

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instructional diagrams

description_image

This diagram depicts the water cycle, which is an important part of the ecosystem. The water in the water cycle exists in three different phases, liquid, solid (ice) and gas (water vapor). Water from lakes and oceans evaporates and is carried by rising air currents in the atmosphere. In the atmosphere the water vapor condenses and forms tiny droplets of water that form clouds. When the droplets get big enough the water comes back to earth in the form of precipitation. Precipitation can be in the form of rain, snow, sleet, or hail. Eventually the water evaporates again and the cycle starts over. Water can also enter the atmosphere through trees and plants from a process called transpiration.

description_image

This diagram shows the processes of the water cycle. It takes place on, above, and below Earths surface. During the water cycle, water occurs in three different states: gas (water vapor), liquid (water), and solid (ice). Many processes are involved as water changes state to move through the cycle. One of the processes is called Evaporation. It takes place when water on Earths surface changes to water vapor. The sun heats the water and turns it into water vapor which escapes up into the atmosphere. Most evaporation occurs from the surface of the ocean. Sublimation is another process takes place when snow and ice on Earths surface change directly to water vapor without first melting to form liquid water. This also happens because of heat from the sun. Transpiration is yet another process that takes place when plants release water vapor through pores in their leaves called stomata. As the water vapor rises up into the earth's atmosphere, it cools and condenses. Condensation is the process of converting water vapor into water droplets. If the droplets get big enough, they fall as precipitation. Precipitation is any form of water that falls from the atmosphere. Precipitation that falls on land may flow over the surface of the ground. This water is called runoff. The runoff may reach a water body such as an ocean or get soaked into the ground.

description_image

This diagram shows the water cycle. Water from lakes, streams, rivers, and other bodies of water evaporates and turns into clouds. This leads to condensation which leads to precipitation in the form of rain and snow. Some precipitation adds to the bodies of water and some goes into the ground. The water that goes into the ground is called ground water--some of it eventually makes its way to bodies of water. Water also can come down from mountains and end up in bodies of water--this is called runoff.

questions

Reservoirs for water in the water cycle include

a. glaciers.

b. the ocean.

c. organisms.

-->  d. two of the above

The ocean is a reservoir in the carbon cycle.

-->  a. true

b. false

Life on Earth could not exist without water.

-->  a. true

b. false

Precipitation may include

a. fog.

b. dew.

-->  c. sleet.

d. all of the above

How can groundwater continue through the water cycle?

a. It may seep out of the ground at a spring.

b. It may seep into a body of water such as the ocean.

c. It may be pumped out of the ground through a well.

-->  d. all of the above

Individual water molecules may be billions of years old.

-->  a. true

b. false

Water changes to a gas by the process of condensation.

a. true

-->  b. false

Exchange pools for carbon include

-->  a. living things.

b. sedimentary rocks.

c. the ocean.

d. two of the above

Water in clouds is in the gaseous state.

a. true

-->  b. false

What percent of Earths atmosphere is nitrogen?

a. 22 percent

b. 28 percent

c. 52 percent

-->  d. 78 percent

Most precipitation falls on land.

a. true

-->  b. false

Volcanic eruptions can release underground carbon from rocks into the atmosphere.

-->  a. true

b. false

Exchange pools for water include

-->  a. the atmosphere.

b. polar ice caps.

c. aquifers.

d. all of the above

Which statement about the water cycle is false?

a. The water cycle is a global cycle.

-->  b. The water cycle takes place only on and above Earths surface.

c. In the water cycle, water exists in three different states.

d. Water cycle processes include condensation.

How do solid carbon compounds change to carbon dioxide in the atmosphere during the carbon cycle?

a. cellular respiration by living things

b. photosynthesis by photoautotrophs

c. decomposition of dead organisms

-->  d. two of the above

What role do plants called legumes play in the nitrogen cycle?

a. Their roots change nitrogen gas in the air into nitrates.

-->  b. Their roots provide a home for nitrogen-fixing bacteria.

c. Their leaves transpire nitrogen gas into the atmosphere.

d. Their leaves change ammonium ions into nitrogen gas.

The only form of nitrogen that plants can use is nitrogen gas.

a. true

-->  b. false

Nitrogen-fixing bacteria change ammonium ions into nitrogen gas.

a. true

-->  b. false

All of the following processes are part of the water cycle except

a. transpiration.

b. sublimation.

c. evaporation.

-->  d. decomposition.

The atmosphere is an exchange pool for water.

-->  a. true

b. false

Nitrogen gas is released into the soil by

a. nitrogen-fixing bacteri

-->  b. denitrifying bacteria.

c. decomposers.

d. two of the above

The process in which plants absorb nitrates through their roots is called

a. nitrification.

b. denitrification.

-->  c. assimilation.

d. ammonification.

Water keeps changing state as it moves through the water cycle.

-->  a. true

b. false

Plants release water vapor to the atmosphere through their leaves.

-->  a. true

b. false

__process in which water vapor changes to liquid water

a. reservoir

b. sublimation

c. carbon cycle

d. runoff

e. exchange pool

-->  f. condensation

g. nitrogen cycle

__part of a biogeochemical cycle that holds a substance for a long period of time

-->  a. reservoir

b. sublimation

c. carbon cycle

d. runoff

e. exchange pool

f. condensation

g. nitrogen cycle

__water that falls as precipitation and then flows over the surface of the land

a. reservoir

b. sublimation

c. carbon cycle

-->  d. runoff

e. exchange pool

f. condensation

g. nitrogen cycle

__biogeochemical cycle that includes sedimentary rocks and fossil fuels

a. reservoir

b. sublimation

-->  c. carbon cycle

d. runoff

e. exchange pool

f. condensation

g. nitrogen cycle

__part of a biogeochemical cycle that holds a substance for a short period of time

a. reservoir

b. sublimation

c. carbon cycle

d. runoff

-->  e. exchange pool

f. condensation

g. nitrogen cycle

__biogeochemical cycle that includes the atmosphere and several types of bacteria

a. reservoir

b. sublimation

c. carbon cycle

d. runoff

e. exchange pool

f. condensation

-->  g. nitrogen cycle

__process in which snow and ice change directly to water vapor

a. reservoir

-->  b. sublimation

c. carbon cycle

d. runoff

e. exchange pool

f. condensation

g. nitrogen cycle

diagram questions

question_image

By what letter is the transpiration represented in the diagram?

a. L

b. A

-->  c. X

d. C

question_image

What is taking place at label X?

-->  a. TRANSPIRATION

b. INFILTRATION

c. EVAPORATION

d. CONDENSATION

question_image

Runoff happens after what part of the diagram?

a. W

b. A

-->  c. L

d. X

question_image

By what letter is the precipitation represented in the diagram?

a. F

-->  b. H

c. R

d. N

question_image

Which label shows the precipitation?

-->  a. H

b. E

c. T

d. D

question_image

Which of the labels in the drawing represents evapotranspiration?

a. K

-->  b. D

c. T

d. E

question_image

Which process shows the transport of water from air to earth?

-->  a. H

b. D

c. E

d. K

question_image

Which label indicates the evaporation of sea water?

a. U

-->  b. R

c. D

d. J

question_image

What is the next stage after evaporation?

a. U

-->  b. J

c. S

d. D

question_image

Which letter indicates condensation?

-->  a. Y

b. K

c. R

d. L

question_image

Which letter is representing the evaporation in this diagram?

a. L

-->  b. K

c. J

d. Y

question_image

What does the letter J represent?

-->  a. RUN OFF

b. PERCOLATION

c. PRECIPITATION

d. CONDENSATION

question_image

Which letter represents condensation?

a. L

b. K

-->  c. Y

d. R

question_image

Which label shows Evaporation?

-->  a. R

b. J

c. D

d. H

question_image

Identify the evaporation process

a. F

b. C

-->  c. D

d. X

question_image

What tag identifies the sun?

-->  a. X

b. F

c. Y

d. K

question_image

Identify the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.

a. F

-->  b. W

c. T

d. D

question_image

Where is the storm cloud?

a. D

-->  b. K

c. F

d. X

question_image

Which label shows moisture over land?

a. P

-->  b. S

c. T

d. M

question_image

Which represents the evaporation from ocean?

a. H

-->  b. E

c. W

d. X

question_image

Which label refers to condensation?

a. E

-->  b. U

c. Y

d. K

question_image

What happens when the sunlight hits the water?

-->  a. EVAPORATION

b. CONDENSATION

c. SUBLIMATION

d. PHOTOSYNTESIS

question_image

What is the part of the Water cycle represented with the letter E?

a. PRECIPITATION

b. CLOUD FORMATION

c. SURFACE RUNOFF

-->  d. EVAPORATION

question_image

Which label shows the snow?

-->  a. L

b. P

c. J

d. A

question_image

Select the infiltration process.

a. P

b. E

c. K

-->  d. C

question_image

Which phase shows water forming into clouds?

a. evaporation

b. runoff

c. infiltration

-->  d. condensation

question_image

What is the process where plants release water vapor through pores in their leaves?

a. Evaporation

b. Infiltration

c. Condensation

-->  d. Transpiration

question_image

What is falling from the clouds?

a. Evaporation

b. Transpiration

-->  c. Precipitation

d. Condensation

question_image

What stage in the cycle occurs prior to precipitation?

a. Run Off

b. Evaporation

c. Infiltration

-->  d. Condensation

question_image

How many alternatives the water has to transform?

a. 8

b. 5

-->  c. 6

d. 4

question_image

What happens when precipitation occurs?

a. evaporation

b. condensation

c. transpiration

-->  d. it rains

question_image

What does the diagram below represent?

a. Oxygen Cycle

b. Nitrogen Cycle

-->  c. Water Cycle

d. Carbon Cycle

question_image

Through what process does water vapor change to water droplets, thereby forming clouds?

a. evaporation

b. precipitation

-->  c. condensation

d. heat

question_image

What is the next stage of the cycle following evaporation?

-->  a. condensation

b. run-off

c. cloud

d. precipitation

question_image

How many steps are shown in the water cycle below?

a. 6

b. 3

-->  c. 4

d. 5

question_image

What is the number of major stages involved in a water/rain cycle?

a. 5

b. 3

c. 6

-->  d. 4

question_image

What happens after evaporation?

a. Precipitation

-->  b. Condensation

c. Sun

d. Cloud

question_image

Identify the process in which water vapor changes to tiny droplets of liquid water.

a. Surface Runoff

-->  b. Condensation

c. Precipitation

d. Evaporation

question_image

What happens after condensation?

a. evaporation

-->  b. Precipitation

c. surface runoff

d. rain

question_image

What is condensation caused by?

a. Surface runoff

-->  b. Evaporation from oceans, lakes and streams

c. Evaporation from plants

d. Precipitation

question_image

How many cycles in the water cycle?

a. 3

b. 1

-->  c. 5

d. 2

question_image

What produces the condensation?

a. Infiltration

b. Precipitation

c. Snowmelt

-->  d. Evaporation and evapotranspiration

question_image

How does water turn into clouds?

a. Precipitation

b. Condensation

-->  c. Evaporation

d. Sublimation

question_image

Which label shows a process of plants releasing water vapor through pores in their leaves?

a. Evaporation

-->  b. Evapotranspiration

c. Precipitation

d. Infiltration

question_image

How many processes are there in the hydrologic cycle?

a. 5

-->  b. 7

c. 6

d. 4

question_image

How many steps has the hydrologic cycle?

a. 5

b. 7

-->  c. How many steps has the hydrologic cycle?

d. 3

question_image

How does precipitation get to rivers and lakes?

-->  a. infiltration, snowmelt, and runoff

b. condensation

c. evapotranspiration

d. plant uptake

question_image

How many types of precipitation do you see here?

-->  a. 2

b. 1

c. 5

d. 3

question_image

What is the term for any form of water that falls from the atmosphere?

a. Condensation

-->  b. Precipitation

c. Transpiration

d. Evaporation

question_image

Name the 2 processes in the diagram in which water changes into a gas.

a. Condensation & Evaporation

b. Evaporation & Precipitation

c. Transpiration & Accumulation

-->  d. Transpiration & Evaporation

question_image

What step of the water cycle causes cloud formation?

a. Evaporation

-->  b. Condensation

c. Precipitation

d. Runoff

question_image

How many processes are involved in the water cycle?

-->  a. 8

b. 2

c. 7

d. 6

question_image

How many types of condensation are there?

a. four

-->  b. two

c. three

d. one

question_image

If more water were to evaporate from the seas and oceans, what would happen to the amount of precipitation?

a. Precipitation would remain the same.

b. Precipitation would cease.

-->  c. Precipitation would increase.

d. Precipitation would decrease.

question_image

What happens when snow and ice on Earths surface change directly to water vapor without first melting to form liquid water?

a. condensation occurs

b. precipitation occurs

-->  c. sublimation occurs

d. evaporation occurs

question_image

Name the process: liquid water turns into gas

a. Precipitation

b. Collection

c. Condensation

-->  d. Evaporation

question_image

What is the process by which surface water is changed to water vapor?

a. Precipitation

b. Transpiration

-->  c. Evaporation

d. Condensation

question_image

What are 2 processes that can form condensation?

a. Precipitation and Evaporation

b. Collection and Runoff

-->  c. Transpiration and Evaporation

d. Transpiration and Precipitation

question_image

What happens immediately after condensation?

a. Evaporation

b. Runoff

-->  c. Precipitation

d. Transpiration

question_image

How many times does condensations appear in the diagram?

-->  a. 2

b. 4

c. 3

d. 1

question_image

What happens if there's too much condensation?

a. Water will run off.

-->  b. Water will precipitate.

c. Water will evaporate.

d. Water will transpire.

question_image

Which process follows condensation?

-->  a. precipitation

b. evaporation

c. transpiration

d. collection

question_image

Through which process does the collected water turn into water vapor?

a. Precipitation

-->  b. Evaporation

c. Freezing

d. Condensation

question_image

What comes after collection?

a. nothing happens

-->  b. evaporation

c. precipitation

d. condensation

question_image

What is water called when is goes up to the sky?

a. precipation

b. collection

c. condensation

-->  d. evaporation

question_image

How many stages are there in the cycle shown?

a. 5

b. 2

c. 3

-->  d. 4

question_image

After condensation, what happens next?

a. calcification

b. evaporation

-->  c. precipitation

d. collection

question_image

What do we call rain?

-->  a. Precipitation

b. Sunshine

c. Collection

d. Evaporation

question_image

How many forms can the water take?

a. 5

b. 6

c. 3

-->  d. 4

question_image

What happens when the sea is heated?

a. the sea will dry up

-->  b. water vapor rises to the cloud and forms rain

c. it will snow

d. there will be drought

question_image

What process occurs in X?

a. Condensation

-->  b. Evaporation

c. Precipitation

d. Sublimation

question_image

How does water return to the air from the ocean?

-->  a. Evaporation

b. Transpiration

c. Precipitation

d. Condensation

question_image

How many steps are in the same cycle as evaporation?

a. 6

b. 3

c. 4

-->  d. 5

question_image

What happens after condensation?

a. evaporation

b. transpiration

-->  c. precipitation

d. runoff

question_image

What happens if there is no evaporation?

-->  a. there will be no water

b. there will be no rain

c. there will be no snow formed

d. there will be no water vapor that will be condensed

question_image

Identify the process that turns liquid water into gas.

a. Wind

b. Snow

-->  c. Evaporation

d. Rain

question_image

Where does ground runoff water collect before evaporation?

a. River

b. Snow

-->  c. Sea

d. Rain

question_image

Why it doesn't rain in the same place the evaporation happened?

a. The evaporation on the trees is not enough

-->  b. Wind pushes the clouds

c. Water evaporates on every process

d. Snow also evaporates

question_image

How many bodies of water are involved in the water cycle?

a. 2

b. 4

-->  c. 3

d. 1

question_image

How many things are evaporated?

a. 4

-->  b. 3

c. 2

d. 1

question_image

This is precipitation that falls on land may flow over the surface of the ground.

a. Snow

-->  b. Ground run-off

c. Rain

d. River

question_image

What would happen to the river if the temperature went up on the mountain?

-->  a. It would rise due to snowmelt and runoff

b. It would rise due to increased precipitation

c. It would dry up due to lack of snow

d. It would take water from the sea

question_image

This takes place when water on Earths surface changes to water vapor.

a. Condensation

b. Groundwater

c. Precipitation

-->  d. Evaporation

question_image

What process comes after evaporation?

a. percolation

b. precipitation

c. run-off

-->  d. condensation

question_image

Which cycle is the one shown in the diagram?

a. biogeochemical cycle

b. carbon cycle

-->  c. water cycle

d. nitrogen cycle

question_image

How many ways is water taken into the clouds?

-->  a. two

b. three

c. one

d. four

question_image

Which process initiates the accumulation of liquid particles to start precipitation?

-->  a. Condensation

b. Percolation

c. Precipitation

d. Evaporation

question_image

Identify the part of the water cycle where water is released

a. evaporation

b. condensation

c. storm cloud

-->  d. rain

question_image

What comes after transpiration?

a. Underground

-->  b. Condensation

c. Rain

d. Evaporation

question_image

What form of water does a storm cloud release?

a. transpiration

b. condensation

c. evaporation

-->  d. rain

question_image

How many processes are depicted in the diagram?

-->  a. 3

b. 4

c. 5

d. 6

question_image

What happens after evaporation?

a. nitrification

-->  b. condensation

c. precipitation

d. transpiration

question_image

What process happens after surface runoff?

-->  a. Infiltration

b. Precipitation on land

c. Evaporation from land

d. Evaporation from ocean

question_image

Which process is the opposite of precipitation?

a. Percolation

b. Infiltration

c. Outflow

-->  d. Evaporation

question_image

If there is no precipitation, will the water cycle still function normally?

a. cannot answer from the given information

-->  b. no

c. yes

d. intermittently

question_image

This takes place when plants release water vapor through pores in their leaves called stomata.

a. Precipitation

-->  b. Transpiration

c. Condensation

d. Evaporation

question_image

Which process is responsible for the rain?

a. Transpiration

-->  b. Precipitation

c. Evaporation

d. Collection

question_image

How many ways does water change into gas?

a. 5

-->  b. 2

c. 3

d. 1

question_image

Which step contributes to groundwater?

-->  a. Precipitation

b. Evaporation

c. Condensation

d. Transpiration

question_image

Identify the process in which plants release water vapor.

a. Condensation

b. Evaporation

-->  c. Transpiration

d. Precipitation

question_image

At what step of the water cycle does water hit the ground?

a. Evaporation

b. Condensation

-->  c. Precipitation

d. Transpiration

question_image

Where does transpiration come from?

a. condensation

-->  b. Trees, plants

c. evaporation

d. precipitation

question_image

How many steps are shown in the diagram?

-->  a. 6

b. 2

c. 3

d. 4

question_image

How many steps in the cycle?

a. 3

b. 2

c. 1

-->  d. 6

question_image

What is the next step in the cycle after condensation?

a. infiltration

b. evaporation

-->  c. precipitation

d. transpiration

question_image

What comes after the evaporation of the water?

a. sublimation

b. transpiration

c. precipitation

-->  d. condensation

question_image

What process turns water into clouds?

a. condensation

b. oxygenation

-->  c. Evaporation

d. sublimation

question_image

How many stages are there in the cycle of matter?

a. 9

b. 7

c. 10

-->  d. 11

question_image

What forms when water evaporates?

a. trees

b. lakes

c. snow

-->  d. clouds

question_image

What if there is no evaporation?

a. no air flow

-->  b. no cloud formation

c. no snow formation

d. nothing happens

question_image

Which does not evaporate?

a. Lake

-->  b. Precipitation

c. Soil

d. Ocean

question_image

What is the next stage after condensation?

a. evaporation

-->  b. precipitation

c. surface runoff

d. condensation

question_image

What is the process when liquid becomes a gas?

a. Condensation

b. Precipitation

-->  c. Evaporation

d. Sublimation

question_image

How many clouds are depicted in the diagram?

a. 1

b. 4

-->  c. 3

d. 2

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How many processes are involved after condensation?

a. 1

b. 3

c. 4

-->  d. 2

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Which among the four does not contribute to evaporation?

a. soil

b. lake

-->  c. rain

d. ocean

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Identify runoff

-->  a. S

b. U

c. F

d. V

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What happens to water between clouds and sea

-->  a. rain

b. nothing

c. sun

d. vapor

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Identify the surface outflow

a. V

b. P

-->  c. W

d. L

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Identify condensation

-->  a. U

b. K

c. E

d. Y