Astronomy Study Guide Test 2

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					                                                                                        Astronomy Study Guide Test 2

   1. Pressure = force / unit area
   2. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
   3. 1) The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather
      occurs in this layer.
      2) Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful
      rays from the Sun.
      3) Meteors or rock fragments burn up in the mesosphere.
      4) The thermosphere is a layer with auroras. It is also where the space shuttle orbits.
   4. A) Jovian planets: J,S,U,N
      B) Terrestrial planets: Mercury: interior appears to resemble that of the Earth. Both planets have a rocky layer
      called a mantle beneath their crust, and both planets have an iron core. Based on Mercury's size and mass,
      scientists believe the planet's core makes up about three-fourths of its radius pg. 170, atmoshhpere: the thinnest
      of all terrestrial: H, He, K…
      Venus: volcanoes, atmosphere: thick high pressures, N 3.5%, Water vapor.003%,
      Mars: ruddy rock plain 95.3% Carbon Dioxide, 2.7 N
      1. Mercury: 0 Venus: 0 Earth: 1: Moon Mars: 2: Phobos, Deimos Jupiter: 62: Io, Europa, Ganymede,
      Callisto… Saturn: 33: Titan Uranus: 27: Cordelia…Neptune: 13: Triton…
      2. Planet Rotation          Period Revolution         Period
                 Mercury                58.6 days              87.97 days
                Venus                   243 days                   224.7 days
                   Earth                     0.99 days                  365.26 days
               Mars                       1.03 days                    1.88 years
               Jupiter                 0.41 days                     11.86 years
              Saturn                     0.45 days                     29.46 years
             Uranus                       0.72 days                   84.01 years
                Neptune                    0.67 days               164.79 years
                  Pluto                 6.39 days         248.59 years
      3. density

1 Sun           Mass 1.9891 × 1030 kg[2] Mass (vs.Earth) 332837 star

2 Jupiter         1.899 × 1027 kg 318.721 5th planet

3 Saturn                  5.6846 × 1026 kg 95.152 6th planet
4 Neptune          1.0243 × 1026 kg 17.145 8th planet

5 Uranus          8.6832 × 1025 kg 14.534 7th planet

6 Earth         5.9742 × 1024 kg 1 3rd planet

7 Venus          4.8685 × 1024 kg 0.88112 2nd planet

8 Mars          6.4185 × 1023 kg 0.107 4th planet

9 Mercury           3.302 × 1023 kg 0.0553 1st planet
       4. asteroids (“Minor Planets”): between M & J
                Size: 1 to 300km diameter
                Pg. 242 Number: 96,154 and 24,227, 286 waiting confirmation to be classified an asteroid .
View of planets: configurations:
6. Mars: red: Oxidized iron which = rust
7. Uranus: Blue:methane obsorbs the red light leaving a blue color
8. Neptune: bands observe red leaving bluish color

9. Earths: N and O
10. Earths makeup:
1. Core, mantle, crust
2. Traces of H and He

11. Mid-Alantic Ridge: a divergent tectonic plate boundary located along the floor of the Atlantic

12. size:
Mercury: 4,878 km or 38% that of Earth

Venus: 12,104 km or 95% that of Earth's

Earth: Diameter=12,756 km

Mars: 6,794 km or 53% that of Earth

13. the amount per unit size, density is mass (m) per unit volume (V) — the ratio of the amount of matter in an
object compared to its volume. A small, heavy object, such as a rock or a lump of lead, is denser than a larger
object of the same mass, such as a piece of cork or foam.

14. the movement of the Earth's continents relative to each other. about 1 inch per year (some places
as much as 2.5 inches per year

15. great hurricane and is caused by tremendous winds that develop above the rapidly spinning
planet. Winds blow counterclockwise around this disturbance at about 250 miles per hour.

NEPTUNE-1846: discovered as a result to the prediction of the gravitational pull on Uranus.

Pluto-1930 tombaugh

Haley-short period comet, orbiting fewer than 200 years

Shoemaker levy-1992

Hale Bobb1995 peroid rotation of 12 hours

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