Chapter 2 Flashcards
What is a galaxy
Huge cluster of stars
What makes up our solar system?
Galaxies
What does terrestrial mean?
Rocky surface
What is another name for moon
Natural satellite of earth
Name 4 inner planets
Mercury, Venus, Earth, mars
Name 5 outer planets
Jupiter, Saturn, Uranus, and Neptune
Planets do not create what?
Light
3 characteristics of our moon
1/4 diameter of the earth
Oblate spheroid
an ellipsoid with two equal semi-diameters
What is the name of our galaxy
Milky Way
What two movements is the earth making at any point and time
Rotation and revolution
Three characters of rotation
24 hours
East to west
1/2 of earth wouldn’t receive sunlight
3 characteristics of revolution
Every 365 1/4 days
1 calendar year
366 is a leap year
In the summer the northern hemisphere the North Pole is pointed towards
The sun
Angled solar rays will
Spread energy out over large area
Name the three latitude bands that are earth?
Low latitude
Middle latitude
Night latitude
If it is fall the northern hemisphere it is _______ in Southern Hemisphere
Spring
What is a name for high latitudes?
Polar region
Give dates for the solstices
Dec 21st June 21st
Give the names for the equinoxes
March 21st sep 21st
3 characteristics of Tropic of Cancer
Stiles earth at line 231/2 degrees, fewest daylight, North Pole points towards sun
Tropic of Capricorn
23 1/2 degrees south
Artic circle 66 1/2 north
Equator 0
Name the 4 earth spheres
Atmosphere
Lithosphere
Hydrosphere
Biosphere
How much of earth is covered by hydrosphere?
70%
What is the make up of the atmosphere
Gas nitrogen
How long does it take earth to rotate
24 hours
How long does it take the earth to revolve?
365 days
Larger stars than ours are called?
Yellow dwarf
Which planets do not have moons
Mercury, Venus
