Lab:
Transpiration
|| trees 1 & 2
|| home || leaves
|| leaf project ||
Purpose:
To conduct field experiments and collect data.
To make observations about transpiration.
To identify which spheres are involved in transpiration (hydrosphere,
biosphere, lithosphere, atmosphere).
To identify which states of matter are involved in transpiration.
Procedure:
- Identify the tree you will be using. (Name of Tree)
- Collect data about the tree: height, circumference, drip line,
- Collect data about the leaves on your tree: leaf rubbing, area, width, length
- Choose 4-5 fresh leaves place a plastic bag around them and tape shut around the branch.
- Check back in 24-48 hours to observe the amount of transpiration (use graduated cylinder to measure)
- Record the volume of water from the bag in the data table.
- Graph the amount of transpiration that occurred for each tree.
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Table 1: Transpiration vs Type of Tree
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# |
Type of Tree |
Height (meters) |
Circumference (cm) |
Drip Line (meters) |
Transpiration occurred (mL) |
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Trial 1 |
Trial 2 |
Average |
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1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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Questions: (complete sentences)
What are some possible errors that may have occurred in your data collection?
Why are trials important?
If you did this experiment again which data (above) would you conduct
more trials? Why?
Graph your data:
Amount of Transpiration vs. Type of Tree
Using
your data, what observations can you make about transpiration and tree
size (height, circumference), type of tree, leaf size…
What states of matter are involved in transpiration?
Give examples of each.
Which spheres are involved in transpiration? Explain each.
Pictures - click to enlarge
|| trees 1 & 2
|| home || leaves
|| leaf project ||
