catalyst read the following scenario and answer the accompanying questions: – plants of the same...

Catalyst • Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received the same amount of water and light, but one plant was placed under red light, and the other plant was placed under green light. After two weeks, the height of the two plants was measured. 1.What is the independent variable? Dependent variable? Explain why. 2.Name two constants mentioned in this experiment.

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Catalyst

• Read the following scenario and answer the accompanying questions:– Plants of the same type and height were placed in the

pots. The plants received the same amount of water and light, but one plant was placed under red light, and the other plant was placed under green light. After two weeks, the height of the two plants was measured.

1. What is the independent variable? Dependent variable? Explain why.

2. Name two constants mentioned in this experiment.

Page 2: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

The Nature of Science: Tricky Tracks

Ms. KlinkhachornSeptember 21, 2009

Page 3: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

Observations

• Data that is collected..– Using the five senses

• Sight• Smell• Touch• Hearing• Taste

– With scientific instruments• Scale• Ruler• Computer and software

Page 4: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

Qualitative vs Quantitative

• Qualitative– Subjective description (can be an opinion)– Example: The food tastes good, is yellow, and

smells nice.• Quantitative– Objective description (clear-cut, measured)– Example: The dog has 4 legs and 2 ears. It weighs

38 pounds.

Page 5: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

What Do You Observe?

Page 6: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

Instructions

1. At your tables, examine the set of tracks given to you. – Share the sheets and do not bend them.– Work silently and individually. Participation points will be

taken from your grade if this is not followed.

2. Think about and write down what you observe and what you believe is happening. Be specific and detailed.

3. Then discuss your thoughts with others at your table and record their thoughts on your paper.– Do not work with people at the other tables.– Keep your volume level down.

Page 7: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

How to write this up…

Track Set What do I observe?

What do I think happened?

What do others say?

Page 8: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

Include..

• What do I observe?– 2 quantitative, 2 qualitative observations

• What do I think happened?– Tell me a story based on what you see. If you

watched this live, what would be happening?• What do others say?– Write down others observations and stories– Exchange ideas

Page 9: Catalyst Read the following scenario and answer the accompanying questions: – Plants of the same type and height were placed in the pots. The plants received

Ending Questions

1. How did your thoughts about what happened in each scenario change as you were given more information? Explain and describe using your observations.

2. Why do you think answers varied from person to person?

3. Is there any one correct answer based on what we saw? Explain.

4. How could you design an experiment to find out what these tracks actually mean?

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