Copy of Germination Gizmo PDF

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Name: Arjun Karthik Date: 8/26/Student Exploration: GerminationDirections: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes.Vocabulary: controlled experiment, germination, hypothesis, seed, sprout, variablePrior Knowledge Questions (Do th...

Description

Name:

Arjun Karthik

Date:

8/26/2021

Student Exploration: Germination Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: controlled experiment, germination, hypothesis, seed, sprout, variable Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What do you think is needed for a seed to grow into a sprout? This is called germination. Water and Fertilizer 2. In the Gizmo, you can test water, light, and heat. Which factors do you think will affect seed germination? All factors will affect the seed germination Gizmo Warm-up: 100% Germination Challenge In the Germination Gizmo, set up the trays however you like: ● ● ● ●

Drag a packet of seeds to each tray. Click on the light bulbs to turn them on or off. Click on the coils to set the heat level. Drag the Daily water slider up or down to adjust the amount of water the seeds get.

When you are ready, click Play ( (100%) to sprout? Good luck!

). How many seeds can you get to sprout? Can you get 20 out of 20

1. After the simulation ends (five “days”), count how many sprouts you have (out of 20) in each tray. What percent sprouted? Fill in your results in the blanks below. ● To find the percent, divide your number of sprouts by 20, and then multiply by 100. ● Hint for mental math: Each seed is 1/20th, or 5%, of the whole. (1/20 = .05 = 5%) Tray 1: 18

/20 = 90

%

Tray 2: 12

/20 =

60

%

Tray 3: 15

/20 =

75

%

2. Click Reset ( ) and Clear trays. Try several more tests to see if you can get more seeds to germinate. What conditions made the most seeds sprout? Seed Type: A

Daily water: 50ml

mL

Heat: Medium

% sprouted = 90

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%

Activity A:

Get the Gizmo ready:

Water and germination

● Click Reset. ● Click Clear trays.

Question: Do seeds need water to germinate? 1. Form a hypothesis: Do seeds need water to germinate? Highlight hypothesis. No, plants need no water.

Yes, plants need some water.

what you think below. This is your

Yes, plants need lots of water.

2. Set up Gizmo: Now you will set up a fair test. A test is fair when all conditions are kept the same except the one(s) you are testing. In science, this is called a controlled experiment. The condition that changes (or varies) is the variable being tested. Set up the trays like this: ● Tray 1: seed A, 0 mL water per day, all 3 lights on, heat low ● Tray 2: seed A, 50 mL water per day, all 3 lights on, heat low ● Tray 3: seed A, 100 mL water per day, all 3 lights on, heat low 3. Experiment: Time to test your hypothesis. Click Play to start. When the Gizmo stops, count the number of sprouts in each tray. Record your data below. Tray

Seed

Amount of water

Amount of light

Amount of heat

Number of sprouts

1

A

0 mL per day

3 lights on

low

0 /20 =0%

2

A

50 mL per day

3 lights on

low

20/20 = 100%

3

A

100 mL per day

3 lights on

low

12/20 = 60%

4. Revise and repeat: What is the ideal amount of water for germination of Seed A? What is ideal for Seeds B and C? Write your findings below. Seed A: 0 5.

mL per day

Seed B: 50

mL per day

Seed C: 100

mL per day

Draw conclusions: In general, do seeds need water to germinate? Explain. Yes. The seeds without any water did not even ger one sprout, when the seeds that got 50ml of water, all 20 seeds germinated. The Seeds with 100ml of water grew only 12/20 seeds.

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Get the Gizmo ready:

Activity B:

● Click Reset. ● Click Clear trays.

Lighten up!

Question: Do seeds need light to germinate? 1. Form a hypothesis: Do seeds need light to germinate? Highlight All seeds need light.

your hypothesis.

Some seeds need light.

No seeds need light.

2. Set up Gizmo: In the Gizmo, design a controlled experiment using Seed A. Remember that a controlled experiment keeps everything the same except what is being tested. Fill in the settings you will use in the table below. (Leave the number of sprouts blank for now.) Tray

Seed

Amount of water

Amount of light

Amount of heat

Number of sprouts

1

A

50ml

0 Lights On

Medium

18/20 = 90%

2

A

50ml

1 Light On

Medium

13/20 = 65%

3

A

50ml

3 Lights On

Medium

14/20 = 70%

3. Experiment: Click Play to run your experiment. Record your results in the table above. 4. Analyze: Does seed A need light to germinate? How do you know this? No, because seed A has germinated the most sprouts with 0 lights on. 5. Revise and repeat: Run a similar experiment with seeds B and C. Do seeds B and C need light to germinate? Describe your findings. Seed B germinated 13 out of 20 seeds, and seed C germinated 14/20 seeds, So no, the seeds can still germinate 6. Draw conclusions: In general, do seeds need light to germinate? Explain. Well, Not really. The seeds still did well without and with lights. The Seeds with the lowest light got 90%, and the speed with the most light got 20% less germinated seeds than the seeds in tray 1.

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Get the Gizmo ready:

Activity C:

● Click Reset. ● Click Clear trays.

Some like it hot

Question: How does the amount of heat affect seed germination? 1. Form a hypothesis: How do you think heat affects germination? State your hypothesis. If there is no heat, then there is no germination. 2. Set up Gizmo: Design a controlled experiment to test the effects of heat on germination. Enter your settings in the table below. Explain how you controlled your experiment. I controlled my experiment

3. Experiment: Click Play. When the Gizmo is done, enter your results in the table below. Tray

Seed

Amount of water

Amount of light

Amount of heat

Number of sprouts

1

C

50ml

3

low

9/20 =45%

2

C

50ml

3

medium

15/20 = 75%

3

C

50ml

3

high

12/20 = 60%

4. Revise and repeat: Design controlled experiments to test the effects of heat on the other types of seeds in the Gizmo. Describe what you find.

5. Draw conclusions: Is too much heat bad for seed germination? Is too little heat bad? Explain. Too Much heat is not bad, but it isnt good either. THe seed with the most light had 60% of its seeds germinate, and the seed with the lowest amount of light had only 45% of its seeds germinate.

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