Question: Which statement describes a physical property of copper?

1. It reacts with strong acids.

2. B. It can be reshaped by a force.

3. C. It ignites at high temperatures.

4. D. It can combine with oxygen.

5. Answer: B.

6. Question: Which of these is an example of a physical change?

7. A. sugar dissolving in warm water

8. B. iron rusting in the presence of moist air

9. C. wood burning in the presence of oxygen

10. D. baking soda reacting with acid to form a gas

11. Answer: A.

12. Question:

13. Answer: A.

14. Question: The table below shows the freezing points of four substances.

15. The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these substances will solidify before the temperature reaches 0°C?

16. A. benzene

17. B. water

18. C. butane

19. D. nitrogen

20. Answer: A.

21. Question:

22. Answer: A.

23. Question:

24. Answer: C.

25. Question: Which is an intensive property of a substance?

26. A. density

27. B. volume

28. C. length

29. D. mass

30. Answer: A.

31. Question: Which term refers to a property that depends only on the amount of a substance?

32. A. flammability

33. B. extensive

34. C. intensive

35. D. reactivity

36. Answer: B.

37. Question:

38. Answer: C.

39. Question: Which procedure could a student use to examine an intensive property of a rectangular block of wood?

40. A. Find the mass.

41. B. Record the length.

42. C. Measure the volume.

43. D. Determine the density.

44. Answer: D.