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Evaporation from Stoma CFU
Xylem Structure and Function
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What is evaporation?
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1 point
the conversion of a vapor or gas to a liquid.
the temperature at which a liquid boils and turns to vapor.
the process of turning from liquid into vapor at the liquid surface.
the temperature at which a liquid turns into a solid when cooled.
Which of these variables will increase the rate of evaporation?
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1 point
Increased pressure
Decrease temperature
Decreased humidity
Where are most stomata located on a plant?
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1 point
underside of leaf surface
stem epidermis
root hairs
top of leaf surface
When are stomata typically open?
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1 point
Night time, so the plant can intake O2 for photosynthesis
Day time, so the plant can release CO2 and H20 from photosynthesis
Night time, so the plant can release CO2 and H20 from photosynthesis
Day time, so the plant can intake CO2 for photosynthesis
When stomata are open, which gases are moving which direction?
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3 points
Moves out
Moves in
H20
O2
CO2
Moves out
Moves in
H20
O2
CO2
What causes closing of stomata?
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1 point
shrinking of guard cells
swelling of guard cells
In the diagram below, match the label to the structure
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3 points
A
B
C
Cell wall
Stoma
Guard cell
A
B
C
Cell wall
Stoma
Guard cell
How many stomata are visible in the image?
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1 point
1
4
5
3
2
Diagram of a leaf cross section:
Which number depicts a structure that prevents too much water from evaporating?
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1 point
1
2
3
4
5
6
7
8
Which number depicts a stoma?
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1 point
1
2
3
4
5
6
7
8
Which number depicts a guard cell?
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1 point
1
2
3
4
5
6
7
8
The Brazil nut tree is able to create rain in the Amazon.
Scroll though this animation
to answer the remaining questions. You only need to view the information about the Brazil nut tree (there are two others that follow)
How does the water get to the top of the Brazil nut tree?
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1 point
water molecules entering the roots pushes water up the xylem and out the leaves
atmospheric water enters the leaves through osmosis
chain of water pulled from up the tree as water evaporates from the leaves
gravity
What proportion of the rainfall in the Amazon is thought to be due to the action of plant transpiration?
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1 point
1/4
1/3
1/2
3/4
What percent of the Amazon has already been destroyed?
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1 point
17
25
50
90
What are some consequences of Amazon deforestation?
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1 point
More frequent droughts
Changes to food and water supplies
Impacted livelihoods for millions of people
Hotter temperatures
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