13 Jan 2. Compare and contrast

Plant Transpiration

Introduction

If you have not already, you or someone you know will try to grow avariety of plants either inside your house or outside in a garden. What type of soil do you need? How often should you water the plants? Should you plant them in full sun? Why do some plants need less water and some more? These are questions that many people haveabout plants. In this activity, you will have a chance to manipulate different variables tosee how much water some plants use and how much some lose through transpiration.

Objectives

1. Conduct virtual experiments to determine factors that affect transpiration.

2. Compare and contrast sustainable and unsustainable farming practices.

Materials

Computer with internet access

Directions

1. Go to:http://glencoe.mcgraw-hill.com/sites/dl/free/0078695104/383946/BL_10.html

2. Read thePURPOSE andOBJECTIVES.

3. Read and follow the information underPROCEDURES,and complete the lab for all 4 plants and all 3 variables.

4. Reset the lab and complete the lab for the next set of 4 plants and 3 variables.

5. Record your information in the Results Table provided on this sheet.

6. During and after the lab, answer the questions below.

Type all answers directly on the data sheet.
Select Save As, and use your last name and student ID as a file name.
Upload the data sheet as a .doc, .docx, or .rtf file when finished.

Questions 1 – 10 are short answer questions and should be answered in two to three words or one to two complete sentences. Total: 40 points

1. What are the three different variables that you tested?(4 points)

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2. State your question.(4 points)

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3. State your hypothesis.(4 points)

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4. Describe the process of transpiration.(4 points)

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5. What environmental factors that you tested increased the rate of transpiration? Was the rate of transpiration increased for all plants tested?(4 points)Text box: .0/msohtmlclip1/01/clip_image001.png”>

6. Did any of the environmental factors (heat, light, or wind) increase the transpiration rate more than the others? Why?(4 points)Text box: .0/msohtmlclip1/01/clip_image001.png”>

7. Which species of plants that you tested had the highest transpiration rates? Why do you think different species of plants transpire at different rates?(4 points)Text box: .0/msohtmlclip1/01/clip_image001.png”>

8. What is your conclusion?(4 points)

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9. Did your results support your hypothesis?(4 points)

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10. State another question about transpiration that you would like to have answered that you did not answer in this lab. (4 points)

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Results Table:You should include data for eight different plants. Make sure you reset the lab (upper right corner) to receive four more plants.Total: 20 points