Earth/Moon System Flashcards
(47 cards)
North end of the axis points towards______
Polaris, the Northstar
Definition of rotation
The spinning of a planet on its axis
The sun and moon seem to move because of earth’s _______
Rotation
A point of the equator rotates about__________
1,600 km per hour
What does rotation cause
Day and night
It is _____ on the side of the earth that is facing the sun
Day
It is _____ on the side of the earth facing away from the sun
Night
Definition of revolution
Movement of one object around another object (ex:planets around the sun)
1 complete revolution around the sun is called a ______
Year
What is our orbit not?
A circle
If earths axis were straight up and down, day relative to the sun temperatures would _______ _________ year-round
Remain constant
If temperatures remained constant, there would be no _______
Seasons
Why does earth have seasons?
It’s axis is tilted
Our axis is tilted at an angle of ___ from the vertical
23.5 degrees
When the north end of earths axis is towards the sun, the northern hemisphere has ______
Summer
When the southern end of earths axis is tilted toward the sun, the northern hemisphere has _____
Winter
Summer and winter are not affected by _______
Changes in earths distance from the sun
Definition of axis
Imaginary line that passes through earths center and the north and south pole
(June 21) which end of earths axis is tilted toward the sun
The north end
June 21
Noon sun is directly overhead at ______ latitude- in the tropic of _____
23.5 degrees north, cancer
Define latitude
Measurement north and south of the equator
June 21
The northern hemisphere will receive more or less hours of sunlight
More
Southern Hemisphere will receive more or less hours of daylight and less direct rays therefore it will have the coolest temps of the year and will be in _____
Winter
Dec. 21
Which end of earths axis is tilted toward the sun?
Southern
