Ch 29.2 Notes and Vocab Flashcards
(31 cards)
Is an area 15 degrees wide in which the time is the same
Time Zone
is the spinning of Earth on its axis, an imaginary line drawn from Earth’s North Pole to its South Pole
rotation
is the motion of Earth in an elliptical orbit around the Sun.
revolution
defined as the plane of Earth’s orbit around the Sun
ecliptic
occurs when Earth’s rotational axis is tilted directly toward the Sun or away from the Sun
solstice
When Earth’s rotational axis is perpendicular to a line drawn from the center of Earth to the center of the Sun
equinox
- Who devised a method of timekeeping around 3000 B.C.?
The Babylonians
- What was the symbol for degree taken from?
From the Babylonians symbol of the sun
- How many degrees does the Earth spin in one day?
360 degrees
- How many hours does it take the earth to make one full rotation?
24 hours
- How many degrees does the Earth spin in one hour?
15 degrees
- What direction does the sun rise?
east
- What direction does the sun set?
west
8.True or False: All time zones are the exact same size?
a. False, they are modified to fit around cities, states, and country borders, and other key sites.
- How many time zones are there in the world?
24 time zones
- Which direction do you move to add hours to the time?
east
- Which direction do you move to subtract hours from the time?
west
- How many times zones are there in the United States?
6 time zones
- What are the names of the time zones?
Hawaii-Aleutian time, Alaska time, Pacific time, Mountain time, Central time and Eastern time
- What is a solar day?
Is when the sun is directly above us at noon and the sun is directly above us again the next day
- What is a sidereal day?
When Earth rotates based on a star
- What are two main reasons for seasons?
the tilt of a planet’s axis and its orbit around the sun
- Which 2 seasons have a solstice?
summer and winter
- Which month is the summer solstice?
June
