1. Evidence 3
After reading the method of this study, four 7th graders drew what the scientists had put in each jar. For each of the next four drawings, decide if the students were right or wrong.
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2. YES NO dark light Here’s the first drawing. Is this drawing correct?
25 g of chloroplasts
25 g of chloroplasts
One thing is missing.
>> the meter to measure carbon dioxide and oxygen levels
(I wanted to put the lid on the first one, so that they can see what the lid looks like.)
YES NO
(If this is your first time on this page, write your answer in 5 B, Box 1.)

3. YES NO dark light There are two errors.
Here’s the second drawing.
Is this drawing correct?
dark
light
Carbon dioxide
meter
Carbon dioxide
meter
50 g of chloroplasts
50 g of chloroplasts
There are two errors.
25g of chloroplasts in each jar.
There is no airtight lid!
The meter measures only CO2, not oxygen.
YES NO
(If this is your first time on this page, write your answer in 5 B, Box 2.) 3

4. YES NO dark light There are two errors.
Here’s the third drawing.
Is this drawing correct?
dark
light
Carbon dioxide
and Oxygen
meter
Carbon dioxide
and Oxygen
meter
50 g of chloroplasts
50 g of chloroplasts
There are two errors.
25g of chloroplasts in each jar.
There is no airtight lid!
YES NO
(If this is your first time on this page, write your answer in 5 B, Box 3.)

5. YES NO dark light Here’s the fourth drawing. Is this drawing correct?
Carbon dioxide
and Oxygen
meter
Carbon dioxide
and Oxygen
meter
25 g of chloroplasts
25 g of chloroplasts
This is correct.
YES NO
(If this is your first time on this page, write your answer in 5 B, Box 4.)

6. CORRECT! Nice Job! There is something missing.
You know what that is, don’t you? If not, double check the text to be sure.
Click next to check the next student’s drawing.
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7. TRY AGAIN!!
There is something missing. Read the methods again to find out what is missing, and try again.
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8. CORRECT!
There were 3 errors! Did you see all 3? If not go back and look for the others. Then click next.
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9. TRY AGAIN!!
There are 3 errors! Read the methods again to find out what the errors are, and try again.
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10. CORRECT!
There were 2 errors in this picture. Did you find both of them? If not go back to the text and try to find both errors. Then click next.
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11. TRY AGAIN!!
There are two errors. Go back and look at the methods and check the picture again. This picture is missing the air tight lid and should only have 25g of chloroplasts in each jar.
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12. CORRECT!
Great Job! This picture is correct! Click next to see the results of this experiment.
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13. Read the methods again then go back and look closely at the picture.
TRY AGAIN!!
Read the methods again then go back and look closely at the picture.
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14. Results! Click next to see the results come in.
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15. The jar has been in the light for 10 minutes
Carbon Dioxide
Oxygen
High
light
Normal
Carbon dioxide
and Oxygen
meter
25 g of chloroplasts
Low 10 20 30
Minutes
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16. The jar has been in the light for 20 minutes
Carbon Dioxide
Oxygen
High
light
Normal
Carbon dioxide
and Oxygen
meter
25 g of chloroplasts
Low 10 20 30
Minutes
BACK
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17. The jar has been in the light for 30 minutes
Carbon Dioxide
Oxygen
High
light
Normal
Carbon dioxide
and Oxygen
meter
25 g of chloroplasts
Low 10 20 30
Minutes
BACK
NEXT

18. The jar has been in the dark for 10 minutes
Carbon Dioxide
Oxygen
High
dark
Carbon dioxide
and Oxygen
meter
Normal
25 g of chloroplasts
Low 10 20 30
Minutes
BACK
NEXT

19. The jar has been in the dark for 20 minutes
Carbon Dioxide
Oxygen
High
dark
Carbon dioxide
and Oxygen
meter
Normal
25 g of chloroplasts
Low 10 20 30
Minutes
BACK
NEXT

20. The jar has been in the dark for 30 minutes
Carbon Dioxide
Oxygen
High
dark
Carbon dioxide
and Oxygen
meter
Normal
25 g of chloroplasts
Low 10 20 30
Minutes
BACK
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21. What differences do you see from the data from the two jars?
What do you conclude from this study?
Dark
Light
Normal
Low
High 10 20 30
Minutes
Carbon Dioxide
Oxygen
Carbon Dioxide
Oxygen
High
Normal
Low 10 20 30
Minutes
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22. See the Results Again!!
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