Earths Motion Flashcards
What is the nearest star to the earth?
The Sun
How many times greater is the diameter of the sun to the Earths diameter?
100 times greater
How hot does the Suns core reach?
Over 15,000,000*C
How hot does the Suns surface reach?
5,500*C
A small part of this energy reaches Earth as…..
Light and thermal energy
Earth_______ , or ________ a_______ around the sun
Orbits or follows a path
How many days does it take the Earth to make one full revolution around the sun?
365.24 days
What causes it to revolve around?
Due to the Suns gravitational pull
As Earth revolves around the sun it_____ or spins on its ________ _____
Rotates
What is an rotational axis?
An imaginary line on which the Earth rotates
Why do different parts of Earths surface receive different amounts of the Sun’s energy?
Because Earth’s surface is curved
What is Earths orbit?
An Ellipse or an elongated, closed curve.
Why does the distance between the Earth change during the year?
Because the sun is not centered in the ellipse
What causes the cycle of seasons on Earth?
The tilt of Earth’s rotation axis, combined with Earth’s motion around the sun causes the seasons to change
Does the hemisphere tilted toward the sun or away from the sun receive more daylight?
Towards the sun
What causes the the Suns radiation to strike the hemisphere at different angles?
Earth’s tilt
What is a solstice?
A day when Earth’s rotation axis is the most toward or away from the Sun
When and where is June’s(Summer) solstice?
On June 20/21 in the northern hemisphere
When and where is December’s(Winter’s) solstice?
On December 21/22 in the northern hemisphere
What is an Equinox?
A day when Earth’s rotation axis is leaning along Earth’s orbit, neither toward nor away from the Sun
When and where is March’s (Spring’s) Equinox?
March 20/21 in the northern hemisphere
When an where is September’s (Fall’s) Equinox?
September 22/23 in the northern hemisphere
What is an ellipse?
An elongated closed curve
