Earth, Moon, Sun Flashcards
(45 cards)
What shape is earth?
A sphere or spheroid
What is the earth split into?
The northern hemisphere and the Southern Hemisphere
In what shape does the earth orbit the sun
A circle and an ellipse
Why does the earth have a magnetic field ?
Because the core of the earth contains iron
Where do ions move to?
The North Pole
What does earth’s magnetic field protect us from?
Harmful particles from the sun
What is the degree the magnetic axis in inclined at?
11.5º and moves over time
What does earth spin around?
An axis-an imaginery vertical line
Why do day and night occur?
Because the earth rotates on its axis
What is earths axis titled at?
23.5º
What causes earth’s seasons?
Earth’s axis tilt
Why do people in one part of the earth get more daylight hours and solar radiation then others?
Because the hemisphere they are living on is tilted towards the sun
When does summer occur?
When the hemisphere is tilted toward the sun
When do people expierence winter?
When the hemisphere is tilted away from the sun
When does the northern hemisphere expierence it’s summer and winter solstice
Summer: June 20-21
Winter: December 21-22
When does the Southern Hemisphere have its solstices?
The reverse of the northern
What’s an equinox?
When daylight hours equal nighttime hours
When do the equinoxes occur for the northern hemisphere?
Spring: March 20-21
Fall: September 22-23
When do the equinoxes occur for the Southern Hemisphere?
The reverse of the northern hemisphere
What is the moon to earth?
A satellite
Why does the moon appear to shine?
Because it’s surface reflects the sunlight
What side of moon does the earth see that changes the appearance of the moon?
The lighted side
What are moon phases?
The different forms that the moon appears to take
How long does it take for the moon to complete its cycle of phases
29.5 days
