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GRADE 10 SCIENCE:
EXAM REVIEW ANSWERS


These are the answers to the first exam review I handed out on Tuesday, January 15th. The page had the title:   "Details of Specific Units on Exam."


1. B
2. E
3. A
4. B
5. C
6. D
7. B
8. B
9. D
10. C
11. D
------------------------------------ Questions were misnumbered: there are two numbers 10 and 11. ------------------------------------ 10. E
11. B
12. C
13. C
14. A
15. B
16. D (except displacement should also have a direction.
17. omitted
18. C
19. A (stopped), B (uniform velocity forward) and C (uniform velocity backwards)
20. D (although we only look at this situation as a regular parabola)
21. A (stopped)
22. D
23. C



PART C: SHORT ANSWER

1A.   Wind direction (used in velocity) will affect the heading the plane needs to fly to get to its destination. Wind speed will also affect the time of arrival of the flight. A tail wind will speed up the flight; a head wind will slow it down.

1B>   To avoid crashes and misdirected flights.   Planes and air traffic controllers from all over the world are directing planes simultaneously so they have to be operating using the same rules or chaos will ensue.

2A.   1, 2, 1, 2     single displacement

2B.   2, 1, 1, 1, 2     double displacement

2C.   2, 2, 1     decomposition

2D.   2, 1, 2     synthesis

3. check out your notes or the text


PART D:   CALCULATIONS

1. -1.33 m/s2

2. Stage A: 2.0 m/s [forward], Stage B: stopped, Stage C: 2.0 m/s [back], Stage D: stopped, Stage E: 1.0 m/s [forward].

3a.   106.6 g/mol     3b. 116 g/mol

4. I don't feel like working this out now!!   Check for an answer later this weekend