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Greetings 7 th Grade Life Scientists!

Greetings 7 th Grade Life Scientists!. TC1. Table of Contents. I can plan and conduct a controlled experiment. Fish Breathing Rate Experiment #1. 21. Purpose: How many breaths will a goldfish take in one minute in room temperature water? Research/ Make Observations:. 22.

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Greetings 7 th Grade Life Scientists!

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  1. Greetings 7th Grade Life Scientists! TC1 Table of Contents

  2. I can plan and conduct a controlled experiment. Fish Breathing Rate Experiment #1 21 Purpose: How many breaths will a goldfish take in one minute in room temperature water? Research/ Make Observations:

  3. 22 3. Hypothesis: If a goldfish is swimming in room temperature water, then it will take breaths per minute. 4. Experiment: Materials: goldfish, 250 mL beaker, 150 mL of room temperature tank water, thermometer, stopwatch, graduated cylinder. Procedure:

  4. 23 5. Collect Data: 6. Analyze Results (graph on p.24): Class Period (x) # of breaths/minute (Y) Group 2nd 3rd 4th 8th 7. Conclusion:

  5. Y- Axis Dependent Variable 24 X Axis Independent Variable

  6. Conclusion Questions: Was your hypothesis close to the class average? What could have caused your results to be different? What questions do you have about goldfish and their breathing rate after this controlled experiment?

  7. Greetings 7th Grade Life Scientists! TC1 Table of Contents

  8. I can plan and conduct a controlled experiment. Fish Breathing Rate Experiment #2 25 Purpose: How does water temperature affect the breathing rate of goldfish? Research/ Make Observations: 3. Hypothesis: If a goldfish is in water, then its breathing rate will compared to a goldfish in room temperature water.

  9. 26 4. Experiment: Materials: Independent Variable:Hot Water Ice cube (Cold Water) Controlled Variables: goldfish, 250 mL beaker, 150 mL r.t.t.w., graduated cylinder, thermometer, stopwatch, 50 mL beaker. Spoon eye dropper 5.Procedure:

  10. 27 5. Collect Data: 6. Analyze Results (graph on p.28): Temperature (x) # of breaths/minute (Y) 2 3 4 8 7-2 10◦C 20◦C 30◦C 7. Conclusion:

  11. Y- Axis Dependent Variable 24

  12. Conclusion Questions, Answer in Paragraph: • Was your hypothesis correct? • Do the results of this experiment surprise you? ______ Whyor why not? • What did you learn about the breathing rate of goldfish by completing this experiment? • What did the observations tell your group about your fish’s behavior? • Do you think the fish’s behavior affected its breathing rate? Why or why not?

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