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Science
7th
grade
Investigation 2 I-Check (Electromagnetic Force)
20 questions
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- 1. Multiple Choice
If you cut permanent magnet into four pieces, you will have _______________. Choose the best answer.
Four temporary magnets
Four smaller permanent magnets
Two north poles and two south poles
Four objects that are no longer magnets
- 2. Multiple Choice
A magnet exerts a force, but you can't see it. Write T next to each example that provides evidence that this is true; write F if the example does not provide the needed evidence.
A paper clip moves toward a magnet when the two objects are about 2 cm apart.
True
False
- 3. Multiple Choice
Write T next to each example that provides evidence that this is true; write F if the example does not provide the needed evidence.
Sometimes you cannot push two magnets together to make them touch.
True
False
- 4. Multiple Choice
Write T next to each example that provides evidence that this is true; write F if the example does not provide the needed evidence.
A magnet is placed on aluminum pan; when you hold the magnet only, the pan falls to the floor.
True
False
- 5. Multiple Choice
Write T next to each example that provides evidence that this is true; write F if the example does not provide the needed evidence.
Iron filings on a plate move into a distinct pattern when gently shaken above a magnet.
True
False
- 6. Multiple Choice
Fill in the blanks with correct terms: potential or kinetic
When a magnet causes a paper clip to move, it's an example of _____________ energy being changed into ______________ energy.
kinetic, potential
potential, kinetic
potential, potential
kinetic, kinetic
- 7. Multiple Choice
Fill in the blank with the correct term: potential or kinetic
A child running is an example of ______________ energy.
potential
kinetic
- 8. Multiple Choice
Fill in the blank with the correct term: potential or kinetic
A motionless iron object in the magnetic field of a magnet may be said to have ______________ energy.
potential
kinetic
- 9. Multiple Choice
People often try to stick notes and other objects to refrigerator doors, using magnets. A student tried to do this, but the object he wanted to stick to the refrigerator fell to the floor.
Choose the answer that says if the explanation explains why the magnet was not able to hold the object to the refrigerator door or if the statement does not help explain what happened.
The refrigerator door is made of steel (that contains iron).
Yes, it explains what happened.
No, it does not explain what happened.
- 10. Multiple Choice
Choose the answer that says if the explanation explains why the magnet was not able to hold the object to the refrigerator door or if the statement does not help explain what happened.
The magnet is too weak.
Yes, it explains what happened.
No, it does not explain what happened.
- 11. Multiple Choice
Choose the answer that says if the explanation explains why the magnet was not able to hold the object to the refrigerator door or if the statement does not help explain what happened.
The object is too thick.
Yes, it explained what happened.
No, it did not explain what happened.
- 12. Multiple Choice
Choose the answer that says if the explanation explains why the magnet was not able to hold the object to the refrigerator door or if the statement does not help explain what happened.
The object is too light.
Yes, it explained what happened.
No, it does not explain what happened.
- 13. Multiple Choice
Choose the answer that says if the explanation explains why the magnet was not able to hold the object to the refrigerator door or if the statement does not help explain what happened.
The refrigerator door is made of aluminum.
Yes, it explained what happened.
No, it did not explain what happened.
- 14. Multiple Choice
True or False
Magnets stick to all metals.
True
False
- 15. Multiple Choice
True or False
Two magnets can attract or repel.
True
False
- 16. Multiple Choice
True or False
A magnet has a north pole or a south pole, but not both.
True
False
- 17. Multiple Choice
True or False
A magnet has an invisible magnetic field extending from its poles.
True
False
- 18. Multiple Choice
Study the data table.
What question was this student testing?
How many washers can you pick up with a magnet?
What is the average number of washers picked up by a magnet?
How does the number of magnets affect the number of washers picked up?
How many trials are needed to pick up the most washers?
- 19. Multiple Choice
Study the data table.
What cause-and-effect relationship can be stated from the data in the table? Choose the best answer.
You can't say because something is wrong with the data; the student should have picked up the same number of washers for each trial.
The average number of washers picked up decreases as more magnets are used.
The average number of washers one magnet can pick up is 9.
The more magnets you use, the more washers you can pick up.
- 20. Multiple Choice
What is the difference between a temporary magnet and a permanent magnet?
Select all that apply: (Choose 2)
Temporary is influenced by a magnetic field for a short period of time, while permanent magnets remain magnetized.
Temporary is always magnetized while permanent is influenced by a magnetic field for a short period of time.
An example of temporary - bar magnet
An example of permanent - donut magnet induced paperclip
An example of temporary - donut magnet induces paperclip
An example of permanent - bar magnet
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