Flashcards in Earth in Space Deck (15):
the study of the moon, stars, and other objects in space.
the imaginary line that passes through Earth's center and the North and South poles.
the movement of one object around another object.
the spinning motion of Earth on its axis.
the path of an object as it revolves around another object in space.
What causes day and night?
The rotation. When Earth rotates east the sun appears and when its west it is night.
Why is an extra day added to February?
because the Romans added one day for every 4 years because the earth orbits around the sun in 365 1/4 days.
Each 24-hour cycle of day and night is called...
Why is it warmer near the equator than near the poles?
because the sun hits the equator directly but at the poles it hits only at a steep angle.
Why does Earth have seasons?
because its axis is tilted as it revolves around the sun.
True or False. When it is summer in the Northern Hemisphere it is winter in the Southern Hemisphere.
each of the two days of the year when the noon sun is farthest north or south of the equator.
Each of the two days of the year when neither hemisphere is tilted toward or away of the equator.
Give Info for:
1. summer solstice
3. winter Solstice
4. Vernal Equinox
1. June 21, longest daytime, Northern hemisphere tilted to sun
2. Sept. 22, 12 hours day, no hemisphere tilted to sun
3. Dec. 21, 8 hours day, Southern Hemisphere tilted to sun
4. March 21, day/night are equal, Northern hemisphere tilted to sun