Ch 29.2 Notes and Vocab

Question 1

Is an area 15 degrees wide in which the time is the same

Answer 1

Time Zone

Question 2

is the spinning of Earth on its axis, an imaginary line drawn from Earth’s North Pole to its South Pole

Answer 2

rotation

Question 3

is the motion of Earth in an elliptical orbit around the Sun.

Answer 3

revolution

Question 4

defined as the plane of Earth’s orbit around the Sun

Answer 4

ecliptic

Question 5

occurs when Earth’s rotational axis is tilted directly toward the Sun or away from the Sun

Answer 5

solstice

Question 6

When Earth’s rotational axis is perpendicular to a line drawn from the center of Earth to the center of the Sun

Answer 6

equinox

Question 7

1. Who devised a method of timekeeping around 3000 B.C.?

Answer 7

The Babylonians

Question 8

2. What was the symbol for degree taken from?

Answer 8

From the Babylonians symbol of the sun

Question 9

3. How many degrees does the Earth spin in one day?

Answer 9

360 degrees

Question 10

4. How many hours does it take the earth to make one full rotation?

Answer 10

24 hours

Question 11

5. How many degrees does the Earth spin in one hour?

Answer 11

15 degrees

Question 12

6. What direction does the sun rise?

Answer 12

east

Question 13

7. What direction does the sun set?

Answer 13

west

Question 14

8.True or False: All time zones are the exact same size?

Answer 14

a. False, they are modified to fit around cities, states, and country borders, and other key sites.

Question 15

9. How many time zones are there in the world?

Answer 15

24 time zones

Question 16

10. Which direction do you move to add hours to the time?

Answer 16

east

Question 17

11. Which direction do you move to subtract hours from the time?

Answer 17

west

Question 18

12. How many times zones are there in the United States?

Answer 18

6 time zones

Question 19

13. What are the names of the time zones?

Answer 19

Hawaii-Aleutian time, Alaska time, Pacific time, Mountain time, Central time and Eastern time

Question 20

14. What is a solar day?

Answer 20

Is when the sun is directly above us at noon and the sun is directly above us again the next day

Question 21

15. What is a sidereal day?

Answer 21

When Earth rotates based on a star

Question 22

16. What are two main reasons for seasons?

Answer 22

the tilt of a planet’s axis and its orbit around the sun

Question 23

17. Which 2 seasons have a solstice?

Answer 23

summer and winter

Question 24

18. Which month is the summer solstice?

Answer 24

June

Question 25

19. Which month is the winter solstice?

Answer 25

December

Question 26

20. Which two seasons are equinoxes?

Answer 26

Spring and Fall

Question 27

21. Which month is the spring equinox?

Answer 27

March

Question 28

22. Which month is the fall equinox?

Answer 28

September

Question 29

23. When is the longest day of the year?

Answer 29

Summer Solstice; June 21

Question 30

24. When is the shortest day of the year?

Answer 30

Winter Solstice; December 21

Question 31

25. When are the days almost 12 hours of the day and 12 hours of night?

Answer 31

March and September; Spring and Fall equinox