7th Grade Experiments

Lichen Field Study Questions

1. Are lichen more common on a particular type

of tree? (Conifer/Evergreens, Deciduous)

2. Do lichens grow on a particular side of a

tree?

Lichen Field Study

1. State the Question

: (Your experimental question)

2. Write your hypothesis

(What do you think and why?)

3. Test your hypothesis

Procedures, independent variable, dependent variable,

controls.

4. Record your data (quantitative AND qualitative)

5. Write your conclusion ( Remember to elaborate)

Lichen Field Study Conference

Top Field Biologists:

-

Megan

Lichen Field Study Conference

1. Are lichen more common on a particular type

of tree? (Conifer/Evergreens, Deciduous)

2. Do lichens grow on a particular side of a

tree?

Conductivity

Experiment

1.State the Question: Does the following water types conduct electricity: Tap, sugar, salt, or baking soda?

2. Write a hypothesis

Which water types do you believe will conduct electricity, and which do you believe will not?

Justify your reasoning with research.

3. Independent variable, dependent variable, controls.

4. Make a log of qualitative observations.

5. Write your conclusion

6. Peer review with two other groups

7. Conference!

Conductivity Conference

Does the following water types conduct

electricity: Tap, sugar, salt, or baking soda?

1.Featured Scientist: Gavin Lindbert

2. Do your results agree with those of the featured scientist? If not, what was different?

3. What were some of your important observations?

4. What new questions does this experiment lead you to?

Conductivity Conference

Does the following water types conduct

electricity: Tap, sugar, salt, or baking soda?

1.Featured Scientist: Caroline

2. Do your results agree with those of the featured scientist? If not, what was different?

3. What were some of your important observations?

4. What new questions does this experiment lead you to?

Conductivity Conference

Does the following water types conduct

electricity: Tap, sugar, salt, or baking soda?

1.Featured Scientist: Savannah Smith

2. Do your results agree with those of the featured scientist? If not, what was different?

3. What were some of your important observations?

4. What new questions does this experiment lead you to?

Lichen Field Study Conference

Top Field Biologists:

-

Jasmine

-

Nathan

-

Naomi and Kendall

Static Charge

Investigation

1. State the Question: What is the overall charge of the aluminum ball, hanging aluminum slip, plastic cup, and balloon?

2. Make a log of qualitative observations. (- 15 pts if incomplete)

3. Write your conclusion

- What is the overall charge of the aluminum ball? Justify your answer

- What is the overall charge of the hanging slip of aluminum? Justify

- What is the overall charge of the plastic cup? Justify your answer

- What is the overall charge of the balloon? Justify your answer? 4. Peer review with two other groups (- 10 pts if incomplete)

5. Conference!

Tootsie Roll Pop Experiment

1. State the Question: How many licks does it take to get to the center of a tootsie roll pop.

2. Write your hypothesis (What do you think and why?)

3. Test your hypothesis

1. Material List 2. Procedures

4. Record your data and graph

1. Include the data of 3 others in your graph. 2. Find the average of all the data.

5. Write your conclusion

1. Is your hypothesis supported or not?

2. What was your results and the average results of your data from others 3. What are your personal thoughts about the data?

4. Which institution had the most trustworthy result?

Measuring Forces Lab

Sloping Flat Thing Lab

1. State the Question: How does an incline plane work?

Using the med

2. Test your hypothesis

1. Material List 2. Procedures

3. Record your data and graph

1. Record quantitative (numbers) data in a table/chart 2. Record and qualitative (description) data/observation 3. Include sample calculations

5. Write your conclusion

Law of Force Experiment

falling marble or a tennis ball rolling down an incline?

2. Write your hypothesis (What do you think and why?) Based the “why” on qualitative data.

3. Test your hypothesis

1. Material List 2. Procedures

4. Record your data and graph

1. Record quantitative (numbers) data in a table/chart 2. Record and qualitative (description) data/observation 3. Include sample calculations

5. Write your conclusion

Laws of Motion Lab

Safety first!

- Make sure no one is in direct firing range when you launch (especially with balls of smaller mass).

- Put the match out quickly after launch is complete

This will be your last lab of the quarter if… - You purposely hit someone with a ball…

- Your matchbox comes back with only a few matches… - You do not complete the lab sheet thoroughly…

- You shot a rubber band across the classroom… - You or anyone else is burned by a match you lit…

- You burn anything else other than the launch string…

Book assignment for those who do not make smart choices: Motion and Force textbook pg. 57-69

Law of Force Experiment

1. State the Question: Which exerts more force upon impact: a falling marble or a tennis ball rolling down an incline?

2. Write your hypothesis (What do you think and why?) Based the “why” on qualitative data.

1. Material List 2. Procedures

3. Record your data and graph

1. Record quantitative (numbers) data in a table/chart 2. Record and qualitative (description) data/observation 3. Include sample calculations

5. Write your conclusion

Metric Instrument Lab

Complete the following on a separate sheet of paper. You may work with another person.

1. What is the metric length of your table?

a. In mm? b. In meters?

c. In kilometers? (km)

2. What is the mass of three popsicle sticks?

a. In mg?

b. In kilograms (kg)

3. What is the mass of a graduated cylinder with 20 ml of water in it?

4. What is the mass of a graduated cylinder with 35 ml of water in it?

Unknown Mass Experiment

1. State the Question: Of the three given canisters, which one contains 9 pennies?

2. Write your hypothesis (What do you think and why?)

3. Test your hypothesis

1. Material List 2. Procedures

4. Record your data and graph

1. Record quantitative (numbers) data in a table/chart 2. Record and qualitative (description) data/observation 3. Include sample calculations

5. Write your conclusion

Gravity Speed Experiment

falling object?

2. Write your hypothesis (What do you think and why?)

3. Test your hypothesis

1. Material List 2. Procedure

4. Record your data and graph

1. Average human running speeds (multiply trials) 2. Average gravitational speed

5. Write your conclusion

Include a sample calculation

6. Publish your results for others to read and criticize (put it on the board)

Gravity Speed Experiment 2

1. State the Question: Is the speed of a falling object constant for different heights?

2. Write your hypothesis (What do you think and why?)

3. Test your hypothesis

1. Material List 2. Procedures

4. Record your data and graph

5. Write your conclusion

6. Publish your results for others to read and criticize (put it on the board)

Acceleration Experiment

1. State the Question: What is the acceleration of a ping pong ball rolling down an incline plane from a height of

2. Test your hypothesis

1. Material List 2. Procedure

4. Record your data

- Include a sample calculation

Show the formula that you used and how you got the acceleration values.

5. Write your conclusion

6. Publish your results for others to read and criticize (put it on the board)

Gravitational Acceleration Experiment

1. State the Question: How high is the classroom ceiling?

2. Test your hypothesis

1. Material List 2. Procedure

4. Record your data

- Include a sample calculation

Show the formula that you used and how you got the height values

5. Write your conclusion

6. Publish your results for others to read and criticize (put it on the board)