eoc review: plant puzzler. biology eoc next thursday!

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EOC Review: Plant Puzzler

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Page 1: EOC Review: Plant Puzzler. Biology EOC next Thursday!

EOC Review: Plant Puzzler

Page 2: EOC Review: Plant Puzzler. Biology EOC next Thursday!

Biology EOC next Thursday!

Page 3: EOC Review: Plant Puzzler. Biology EOC next Thursday!
Page 4: EOC Review: Plant Puzzler. Biology EOC next Thursday!

Directions: Use the following information to answer questions 1 through 9.Demetri did the following investigation in a local college laboratory to see how carbon dioxide (CO2) affects plant growth.Demetri grew bean plants in growth chambers where he could control the amount of oxygen (O2) and CO2 in the air around the plants. He grew the bean plants in water with mineral nutrients instead of soil. Demetri had to completely dry the plants in an oven to get the plants’ dry mass.Question: What is the effect of different amounts of carbon dioxide (CO2) in air on the dry mass of bean plants?Hypothesis: As the concentration of CO2 in air increases, the dry mass of bean plants will increase because bean plants use CO2 for growth.

Page 5: EOC Review: Plant Puzzler. Biology EOC next Thursday!

Procedure:1. Put 12 bean plants into Chamber A as shown in the Investigation Setup diagram. Do the same to

Chambers B and C.2. Make sure each chamber receives the same amount of light and water. Keep the chambers at a

constant temperature and pressure.3. Adjust the O2 level of the air in each chamber to the normal amount of O2 in the atmosphere.4. Remove 4 bean plants from each chamber. Dry the plants in the oven and measure their dry

masses.5. Calculate and record the average dry masses as Day 1.6. Set and keep the CO2 level in Chamber A at 0 parts per million (ppm), Chamber B at 700 ppm, and

Chamber C at 1,400 ppm.7. Repeat steps 4 and 5 for Day 7 and Day 14.

Amount of CO2 vs. Bean Plant Dry Mass

Amount of CO2

(parts per million)

Bean Plant Dry Mass(averages in grams)

Day 1 Day 7 Day 140

(Chamber A) 0.8 0.8 0.8

700(Chamber B) 0.8 4.5 8.6

1,400(Chamber C) 0.8 4.7 10.8

Note: Day 1 masses were determined before CO2 levels were adjusted.

Page 6: EOC Review: Plant Puzzler. Biology EOC next Thursday!

1 What was the manipulated (changed) variable in this investigation?

A. Amount of lightB. Amount of CO2 C. Growth of plantsD. Type of plants

Page 7: EOC Review: Plant Puzzler. Biology EOC next Thursday!

2 Which two variables were controlled (kept the same) variables in this investigation?

A. Final bean plant dry mass and amount of lightB. Amount of CO2 and type of growth chamberC. Growth of plants and amount of O2

D. Type of plants and amount of O2

Page 8: EOC Review: Plant Puzzler. Biology EOC next Thursday!

3 Which variable was the responding (dependent) variable in this investigation?

A. Hours of lightB. Bean plant dry mass C. Total days bean plants grewD. Mineral nutrients in the water

Thing measured

Page 9: EOC Review: Plant Puzzler. Biology EOC next Thursday!

4 Why did Demetri have growth chamber A adjusted to 0 ppm of CO2?

A. To show bean plants can make their own CO2 when none is available B. To make the bean plants use oxygen for photosynthesis instead of CO2

C. To ensure the amount of CO2 caused the differences in dry mass D. To demonstrate that CO2 is used by the bean plants for respiration

Control group

Amount of CO2 vs. Bean Plant Dry Mass

Amount of CO2

(parts per million)

Bean Plant Dry Mass(averages in grams)

Day 1 Day 7 Day 140

(Chamber A) 0.8 0.8 0.8

700(Chamber B) 0.8 4.5 8.6

1,400(Chamber C) 0.8 4.7 10.8

Note: Day 1 masses were determined before CO2 levels were adjusted.

Page 10: EOC Review: Plant Puzzler. Biology EOC next Thursday!

5 Glucose is produced through the process of photosynthesis. What form of energy does the glucose have because of photosynthesis?

o A. Heat o B. Light o C. Nuclear o D. Chemical

Page 11: EOC Review: Plant Puzzler. Biology EOC next Thursday!

6 What could Demetri do to be more certain the results of his experiment are reliable?

o A. Test the reaction with different concentrations of oxygen. o B. Repeat the experiment the same way. o C. Increase the volume of water given to plants. o D. Use a different type of growth chamber.

Page 12: EOC Review: Plant Puzzler. Biology EOC next Thursday!

7 What did Demetri do to make sure the results of his experiment were valid?

o A. Kept all variables the same except for the amount of carbon dioxide each group received.

o B. Gave each group of plants different amounts of oxygen. o C. Gave group C plants 1,400 ppm of CO2.o D. Calculated the average dry masses on Day 1. Fair test

Page 13: EOC Review: Plant Puzzler. Biology EOC next Thursday!

8 Write a conclusion for this investigation. In your conclusion, be sure to:• Answer the investigative question.• Include supporting data from the Amount of CO2 vs. Bean Plant Dry Mass table.• Explain how these data support your conclusion.

Question: What is the effect of different amounts of carbon dioxide (CO2) in air on the dry mass of bean plants?

 

 

 

 

 

 

Be sure to include all of these in your response!

Page 14: EOC Review: Plant Puzzler. Biology EOC next Thursday!

8 Write a conclusion for this investigation. In your conclusion, be sure to:• Answer the investigative question.• Include supporting data from the Amount of CO2 vs. Bean Plant Dry Mass table.• Explain how these data support your conclusion.

Question: What is the effect of different amounts of carbon dioxide (CO2) in air on the dry mass of bean plants?

As the CO2 increased, the dry mass of the beans also increased.

Group A, plants with no CO2 mass stayed at 0.8g

Group B plants got 700 ppm of CO2 and went from 0.8 g to 8.6 g

Group C plants got 1,400 ppm of CO2 and went from 0.8 g to 10.8g

Page 15: EOC Review: Plant Puzzler. Biology EOC next Thursday!

Amount of CO2 vs. Bean Plant Dry Mass

Amount of CO2

(parts per million)

Bean Plant Dry Mass(averages in grams)

Day 1 Day 7 Day 14

0(Chamber A) 0.8 0.8 0.8

700(Chamber B) 0.8 4.5 8.6

1,400(Chamber C) 0.8 4.7 10.8

Note: Day 1 masses were determined before CO2 levels were adjusted.

Page 16: EOC Review: Plant Puzzler. Biology EOC next Thursday!

9 Plan a new investigation to answer the new question printed in the box. In your plan, be sure to include:

• Hypothesis• Materials• Procedure that includes:

• logical steps to do the investigation one responding variable• two controlled variables an experimental control condition• one manipulated variable how often measurements should be taken and

recorded

Question: What is the effect of different amounts of mineral nutrients on the heightof bean plants grown in CO2 rich atmosphere?Hypothesis:   Materials:   Procedure: You may use this space for a labeled diagram to support your procedure.

Be sure to include all of these in your response!

Page 17: EOC Review: Plant Puzzler. Biology EOC next Thursday!

Question: What is the effect of different amounts of mineral nutrients on the heightof bean plants grown in CO2 rich atmosphere?Hypothesis: I believe the more mineral nutrients, the taller the plant will grow because plants need mineral nutrients to grow. So the more nutrients, the better.

Materials: bean plants (all same size), water, planting pots (all same with same soil),Lights (all same), rulerProcedure: You may use this space for a labeled diagram to support your procedure. light Group A Group B Group C Group D No nutrients 1 tsp. nutrients 2 tsp. nutrients 3 tsp. nutrient

1. Put 3 bean plants in 4 different groups A, B, C, and D.2. Make sure each group gets the same amount of water and light, same soil3. Use ruler to record the height of all of the plants.4. Give group B plants 1 tsp. of nutrients, group C 2 tsp., and group D 3 tsp. No nutrients for group A.5. Record height of plants every day for 3 weeks. Compare heights.6. Repeat experiment 3 more times.

Page 18: EOC Review: Plant Puzzler. Biology EOC next Thursday!
Page 19: EOC Review: Plant Puzzler. Biology EOC next Thursday!