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12. A shiny object does not conduct electricity and is nonmagnetic. What might it be? A. Plastic B. Iron
A
21. A material allows electricity to flow, does not dissolve, and is dull-looking. What could it be? A. Plastic B. Graphite
B
20. A student tests an unknown powder. It does not dissolve and does not conduct electricity. What is it? A. Chalk powder B. Graphite
A
19. A material lets heat pass through very easily but does not dissolve in water. What could it be? A. Copper B. Sugar
A
18. An object is shiny, reflects light, and is not magnetic. What is it most likely made of? A. Aluminum B. Iron
A
17. A teacher wants to keep a dish warm for longer. Which material should be used to cover it? A. Aluminum foil B. Paper towel
B
16. You need an object that will NOT conduct electricity for a school project. Which should you choose? A. Plastic ruler B. Metal spoon
A
15. You want to separate iron nails from copper nails. Which tool should you use? A. Spoon B. Magnet
B
14. You need a material to make a safety vest that reflects light at night. Which one is best? A. Shiny reflective tape B. Black cotton fabric
A
13. Which material would be best for the handle of a hot cooking pot? A. Aluminum B. Wood
B
11. Why does wool keep us warm? A. It traps air and stops heat loss B. It allows heat to escape easily
A
10. Why is copper used inside electrical cables? A. It conducts electricity well B. It blocks electricity
A
9. Why are electrical wires covered with plastic? A. Plastic is a good electrical conductor B. Plastic is an electrical insulator
B
8. Why are thick oven gloves made of fabric and other insulators? A. To prevent heat from passing through B. To allow heat to move easily
A
7. Why can aluminum foil reflect much light? A.It is rough and dull B.It is smooth and shiny
B
6. Which object is shiny and reflects light well? A. Mirror B. Rubber band
A
5. What does “dissolve” mean? A. To be soluble in a liquid B. To be insoluble in a liquid
A
4. What do we call a material that does not allow electricity to pass through? A. Electrical insulator B. Electrical conductor
A
3. Which material is a good thermal conductor? A. Aluminum B. Wood
A
2. Which property tells how much light a material reflects? A. Reflectivity B. Solubility
A
1. Which material is magnetic? A. Copper B. Iron
B
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