4.9.4 the atmosphere

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a) identify gases that comprise the greater percentage of air and explain the difference between Earth’s atmosphere and space

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b) describe the importance of atmospheric gases, including ozone and greenhouse gases, to life on Earth

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Greenhouse effect Investigation

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http://www.riskassess.com.au/risk_assessment/187453

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Background Research (teacher directed):

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1. Watch the following Brainpop Video, the login and password are nbcs, nbcs: http://www.brainpop.com/science/earthsystem/earthsatmosphere/

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2. Which gases make up the atmosphere?

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3. What is the difference between the atmosphere and space?

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4. For each of the following gases identify their importance to life on earth:

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a. Oxygen (include respiration)

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b. Nitrogen

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c. Carbon dioxide (include photosynthesis)

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d. Methane

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e. Ozone

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Equipment for each group

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1. Thermometer

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2. Temperature probe

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3. Cardboard (for box construction) X2

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4. Sticky tape

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5. Scissors

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6. Light source – microscope lamp

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7. Stopwatch

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8. Coloured cellophane

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9. Clear cellophane

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10. Paper

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11. Aluminum foil

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12. Ruler

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13. Glad wrap

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14. Graph paper

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Part A

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Standard method

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1. Construct a box without a lid using the template supplied

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2. Place the box 20cm distance from a light source

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3. Insert a thermometer or temperature probe through the hole, so that it is sitting in the middle of the space in the box

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4. Measure the change in temperature when the light is turned on, once a minute for 10 minutes.

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5. Repeat the experiment, but cover the open lid with clear cellophone.

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For the experiment above:

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Write an aim
Write a hypothesis
Write a risk assessment
Draw an appropriate diagram of your setup
List all variables.
Distinguish between controlled and uncontrolled variables.
Identify the dependent variable
Identify the independent variable

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9. Identify the “control”

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10. Graph your results

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11. Analyse your graph for the usefulness of the data.

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a. Should the readings be more or less frequent?

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b. Should the readings be taken over a longer/shorter time period?

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c. Does the information on your graph support your hypothesis?

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12. Save this file for your study records.

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Part B

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Use the method above as a starting point to investigate a different independent variable:

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1. List all the things that could be investigated to see their effect on temperature in a box!

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2. Choose one of the things from your list to investigate, using the materials available.

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3. Answer all the questions below on your method:

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1. Write an aim
2. Write a hypothesis
3. Write a risk assessment
4. Draw an appropriate diagram of your setup
5. Identify the dependent variable
6. Identify the independent variable

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g. Identify the “control”

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4. Write a draft method for your investigation, incorporating any improvement on the standard method.

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5. Carry out your investigation

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6. Graph your results

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7. Write a conclusion that analyses your hypothesis.

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8. Identify any changes or improvements you made to your method.

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9. Submit this Part B document

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Cut along the unbroken lines, fold along the dashed lines, and stickytape together.

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the environment?