Greetings 7th Grade Life Scientists!

Table of ContentsTC1

Date Activity Pg. #

9/4 Characteristics of Life 9-10

9/10 Life on Mars 11-14

9/24 Is it Alive? 15-16

10/1 Liquid Volume 17

10/2 Temperature 18

10/4 Graphing 19-20

10/9 Fish Breathing Rate Experiment #1 21-24

21

I can plan and conduct a controlled experiment.

Fish Breathing Rate Experiment #1

1. Purpose: How many breaths will a goldfish take in one minute in room temperature water?

2. Research/ Make Observations:

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:

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:

24

X Axis

Y- Axis

Independent Variable

Dependent Variable

Conclusion Questions:

1.Was your hypothesis close to the class average?

2.What could have caused your results to be different?

3.What questions do you have about goldfish and their breathing rate after this controlled experiment?

Greetings 7th Grade Life Scientists!

Table of ContentsTC1

Date Activity Pg. #

9/4 Characteristics of Life 9-10

9/10 Life on Mars 11-14

9/24 Is it Alive? 15-16

10/1 Liquid Volume 17

10/2 Temperature 18

10/4 Graphing 19-20

10/9 Fish Breathing Rate Experiment #1 21-24

10/15 Fish Breathing Rate Experiment #2 25-28

25

I can plan and conduct a controlled experiment.

Fish Breathing Rate Experiment #2

1. Purpose: How does water temperature affect the breathing rate of goldfish?

2. Research/ Make Observations:

3. Hypothesis: If a goldfish is in water, then its breathing rate will compared to a goldfish in room temperature water.

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:

27

5. Collect Data:

6. Analyze Results (graph on p.28):Temperature (x) # of breaths/minute

(Y)2

3 4 8 7-210◦C20◦C30◦C

7. Conclusion:

24Y- Axis Dependent Variable

Conclusion Questions, Answer in Paragraph:1. Was your hypothesis correct?2. Do the results of this experiment surprise you?

______ Why or why not? 3. What did you learn about the breathing rate of

goldfish by completing this experiment?4. What did the observations tell your group about

your fish’s behavior? 5. Do you think the fish’s behavior affected its

breathing rate? Why or why not?