Rotation & Revolution
What cycle does earth's rotation create?
The day & night cycle
How do seasons change?
When earth’s poles tilt towards or away from the Sun
Which seasons do equinoxes mark?
Spring and Fall
Which seasons do solstices mark?
Summer and winter
The earth rotates counter-clockwise when viewed from the _____
North pole
If the North pole is starting to tilt towards the sun, which season is it for the northern hemisphere?
Spring
Where is the Earth’s terminator line during an equinox?
The line is straight down the middle vertically
In which months do solstices occur?
June and December
A full orbit around the sun
If the North pole is tilted away from the sun, which season is it for the southern hemisphere?
Summer
What is the solar declination on Earth during an equinox?
0 degrees
What is are solstices?
The days where poles point most directly towards or away from the sun, resulting with the sun reaching the highest or the lowest point in the sky for the year.
What is one reason that earth rotates? (FIX)
1. The earth's and moon's center of mass pulls eachot
2. the sun
What is earth's terminator line?
The line that divides the dark and light parts of Earth (day and night).
What are the conditions that make an equinox happen?
Earth’s equator meets on the same plane of the Sun’s equator.
If it is the June solstice, which season is beginning for the southern hemisphere?
Winter
Why does the sun rise in the east and set in the west?
The earth is carried eastward
Why doesn’t Earth orbit in a perfect circle
It's axis doesn’t stand straight
Define Earth’s subsolar point and state where it is located during an equinox
The subsolar point is where the sun is directly overhead. It is located on the equator during an equinox.
If it is the December solstice, is it the darkest or the brightest day for the northern hemisphere?
Darkest