| A | B |
|---|
| AXIS | An imaginary vertical line around which Earth spins |
| ROTATION | The spinning of Earth on its axis causes day and night. |
| REVOLUTION | Earth's yearly orbit around the Sun. |
| ELLIPSE | An elongated, closed curve. |
| N. Hemisphere Winter: January 3 | WHEN IS EARTH CLOSEST TO THE SUN? |
| The sun is not in the center of our elliptical orbit around it. | Why does our distance from the sun vary throughout the year? |
| In the summer: July 4th each year! | When is Earth farthest away from the sun? |
| 23.5 degrees tilted toward the Earth, ou | At what degree does Earth tilt on its axis? |
| When the northern hemisphere is tilted toward the Sun, those in Australia are in what season? | Winter |
| When our hemisphere is tilted AWAY from the Sun, we experience | WINTER |
| solstice | occurs when the Sun reaches its greatest distance N or S of the equator |
| equator | two times during the year, the Sun is directly over this imaginary line that circles Earth halfway between the poles |
| sphere | round, trhee-dimensional object whose surface at all points is the same distance from its center |
| Your birthday = | The number of trips you've made around the Sun |
| tilt | property of Earth that causes seasons |
| N. Hemisphere location of 24-hour daylight hours on Summer Solstice | North Pole |
| plane of the ecliptic | path of Earth's orbit around the sun |
| umbra | Latin: shadow |
