L2 Flashcards
What are the 2 ways earth moves in space?
rotation
revolution
What is rotation?
the spinning of the earth on its axis
what is the axis of the earth?
an imaginary line that passes through Earths center, north, and south poles on which earth rotates
What makes day and nigh occur?
the rotation of the earth
what is the revolution of the earth
the movement of an object around another object
What is a complete revolution of earth around the sun called?
a year
what is a calendar
a system of organizing time that defines the beginning, length, and divisions of a year
What causes seasons?
Earth has seasons b/c its axis is tilted as it revolves around the sun
what is a solstice?
One of two days in a year when the sun appears farthest north or south of the equator.
What is an equinox?
either of 2 days during a year when the sun’s noon position is directly above the equator, making day and night approximately equal in all places on earth.
What solstice is it in the northern hemisphere when the sun appears farthest north of the equator?
summer
What solstice is it in the northern hemisphere when the sun appears farthest south of the equator?
winter
What solstice is it in the southern hemisphere when the sun appears farthest north of the equator?
winter
What solstice is it in the southern hemisphere when the sun appears farthest south of the equator?
summer
What are the names of the two equinoxes?
vernal & Autumnal
