chapter four review
Answer Section
MODIFIED TRUE/FALSE
1. ANS: F, atom
PTS: 1
2. ANS: F, Water
PTS: 1
3. ANS: T
REF: section 4.2
4. ANS: T
REF: section 4.2
5. ANS: F, ecosystem
PTS: 1
6. ANS: T
REF: section 4.3
7. ANS: F, Clay
PTS: 1
MULTIPLE CHOICE
8. ANS: B PTS: 1 DIF: basic REF: section 4.1
9. ANS: A PTS: 1 DIF: basic REF: section 4.1
10. ANS: D PTS: 1 DIF: basic REF: section 4.1
11. ANS: B PTS: 1 DIF: basic REF: section 4.1
12. ANS: C PTS: 1 DIF: basic REF: section 4.1
13. ANS: C PTS: 1 DIF: intermediate REF: section 4.1
14. ANS: C PTS: 1 DIF: intermediate REF: section 4.1
15. ANS: A PTS: 1 DIF: intermediate REF: section 4.1
16. ANS: B PTS: 1 DIF: intermediate REF: section 4.1
17. ANS: D PTS: 1 DIF: advanced REF: section 4.1
18. ANS: C PTS: 1 DIF: basic REF: section 4.2
19. ANS: C PTS: 1 DIF: basic REF: section 4.2
20. ANS: C PTS: 1 DIF: basic REF: section 4.2
21. ANS: D PTS: 1 DIF: basic REF: section 4.2
22. ANS: C PTS: 1 DIF: basic REF: section 4.2
23. ANS: A PTS: 1 DIF: basic REF: section 4.2
24. ANS: C PTS: 1 DIF: basic REF: section 4.2
25. ANS: C PTS: 1 DIF: intermediate REF: section 4.2
26. ANS: D PTS: 1 DIF: intermediate REF: section 4.2
27. ANS: B PTS: 1 DIF: intermediate REF: section 4.2
28. ANS: C PTS: 1 DIF: intermediate REF: section 4.2
29. ANS: C PTS: 1 DIF: intermediate REF: section 4.2
30. ANS: D PTS: 1 DIF: advanced REF: section 4.2
31. ANS: B PTS: 1 DIF: advanced REF: section 4.2
32. ANS: A PTS: 1 DIF: advanced REF: section 4.2
33. ANS: B PTS: 1 DIF: basic REF: section 4.3
34. ANS: A PTS: 1 DIF: basic REF: section 4.3
35. ANS: C PTS: 1 DIF: basic REF: section 4.3
36. ANS: C PTS: 1 DIF: intermediate REF: section 4.3
37. ANS: B PTS: 1 DIF: intermediate REF: section 4.3
38. ANS: A PTS: 1 DIF: advanced REF: section 4.3
39. ANS: A PTS: 1 DIF: advanced REF: section 4.3
40. ANS: D PTS: 1 DIF: advanced REF: section 4.3
41. ANS: A PTS: 1 DIF: advanced REF: section 4.3
COMPLETION
42. ANS: molecule
PTS: 1 DIF: basic REF: section 4.1
43. ANS: atom
PTS: 1 DIF: basic REF: section 4.1
44. ANS: chemical reaction
PTS: 1 DIF: basic REF: section 4.1
45. ANS: nucleic acid
PTS: 1 DIF: basic REF: section 4.2
46. ANS: carbon
PTS: 1 DIF: basic REF: section 4.2
47. ANS: lipid
PTS: 1 DIF: intermediate REF: section 4.2
48. ANS: starch
PTS: 1 DIF: intermediate REF: section 4.2
49. ANS: oxygen
PTS: 1 DIF: intermediate REF: section 4.3
SHORT ANSWER
50. ANS:
The reactants are the atoms or molecules that combine and the product is what is made during a chemical reaction. 4Fe and 3O2 are the reactants. 2Fe2O3 is the product.
PTS: 1 DIF: advanced REF: section 4.1
51. ANS:
The three most common elements found in living things are carbon, oxygen, and hydrogen.
PTS: 1 DIF: basic REF: section 4.2
52. ANS:
Fish are best kept at a pH of 6-8 and they need dissolved oxygen levels of around 9 parts per million (ppm).
PTS: 1 DIF: advanced REF: section 4.3
ESSAY
53. ANS:
The first factor the enables water to support life is that it is a good solvent. Other substances can easily dissolve into water. Secondly, water exists as a liquid at a large range of temperatures. Water freezes at 0ºC and boils at 100ºC. Lastly, water has a high specific heat. It takes a lot of energy to raise the temperature of water.
PTS: 1 DIF: intermediate REF: section 4.1
54. ANS:
Answers may vary, but a complete answer will include the following: Plants and animals both use energy and store energy. Both plants and animals contain cells that need energy to function and make more cells (to grow). Both need energy stores for times when they need extra energy and can’t get enough of it from their surroundings.
PTS: 1 DIF: intermediate REF: section 4.1
55. ANS:
Life is a series of chemical reactions. Two examples of these chemical reactions are (1) photosynthesis, used by plant cells to store energy from the sun, and (2) cellular respiration, used by cells to release energy. Cells must constantly use chemical reactions to make or use energy for movement, for growing, for reproduction, and for virtually all life processes.
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