Book: Science Resources, Grade 4
ISBN-10: 1-59242-996-3
Answer Key
Section: Magnetism and Electricity
When Magnet Meets Magnet
1. Answers will vary
2. Answers will vary
3. Magnetics stick to iron.
4. You make steel by mixing iron with other metals.
5. Magnets stick to steel because steel is mostly iron.
6. The five metals magnets do not stick to aluminum, copper, silver, gold and brass.
7. The two metals that magnets stick two are iron and steel.
8. Answers will vary
9. Answers will vary
10. Magnetic poles are at the end part of a magnet.
11. Magnetic poles are called north poles and south poles.
12. The magnetic poles are located at the end of the magnet.
13. True, magnets always have a north pole and a south pole.
14. Like poles repel.
15. Opposite poles attract.
16. A force is a push or a pull.
17. Magnetism is a force.
18. You feel the magnetic force when you pull two attracting magnets apart or push two repelling magnets together.
19. Induced magnetism is magnetism in the iron.
20. Lodestone is when magnetite is magnetic by itself.
21. The area that is rich with lodestone is Magnesia, present-day Turkey.
22. Utah, Arkansas, Minnesota, and New York are the 4 magnetite sources in the U.S.
Magnificent Magnetic Models
23. The ancient Egyptians and Romans used magnets to create artwork.
24. The Egyptians hung iron and lodestone figures from ropes.
25. The Romans used magnets to suspend a figure of the god Mercury in midair in one of their temples.
Make a Magnetic Compass
26. A magnetic field is invisible lines that loop.
Summary: The Force
27. True, magnets are attracted to iron and steel.
28. True, iron changes into a temporary magnet.
29. True, magnets that enter the magnetic field of another magnet reorient to line up with the invisible field.
30. A compass is a magnetic needle that is free to rotate at its center.
31. True, Earth is a huge magnet.
ISBN-10: 1-59242-996-3
Answer Key
Section: Magnetism and Electricity
When Magnet Meets Magnet
1. Answers will vary
2. Answers will vary
3. Magnetics stick to iron.
4. You make steel by mixing iron with other metals.
5. Magnets stick to steel because steel is mostly iron.
6. The five metals magnets do not stick to aluminum, copper, silver, gold and brass.
7. The two metals that magnets stick two are iron and steel.
8. Answers will vary
9. Answers will vary
10. Magnetic poles are at the end part of a magnet.
11. Magnetic poles are called north poles and south poles.
12. The magnetic poles are located at the end of the magnet.
13. True, magnets always have a north pole and a south pole.
14. Like poles repel.
15. Opposite poles attract.
16. A force is a push or a pull.
17. Magnetism is a force.
18. You feel the magnetic force when you pull two attracting magnets apart or push two repelling magnets together.
19. Induced magnetism is magnetism in the iron.
20. Lodestone is when magnetite is magnetic by itself.
21. The area that is rich with lodestone is Magnesia, present-day Turkey.
22. Utah, Arkansas, Minnesota, and New York are the 4 magnetite sources in the U.S.
Magnificent Magnetic Models
23. The ancient Egyptians and Romans used magnets to create artwork.
24. The Egyptians hung iron and lodestone figures from ropes.
25. The Romans used magnets to suspend a figure of the god Mercury in midair in one of their temples.
Make a Magnetic Compass
26. A magnetic field is invisible lines that loop.
Summary: The Force
27. True, magnets are attracted to iron and steel.
28. True, iron changes into a temporary magnet.
29. True, magnets that enter the magnetic field of another magnet reorient to line up with the invisible field.
30. A compass is a magnetic needle that is free to rotate at its center.
31. True, Earth is a huge magnet.
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