1. by amores
by josh

2. Bell Ringer Get Astronomy Unit 1 Study Guide
Place agenda in the top corner of your desk.
Begin answering the study guide with the information you know in PENCIL.

3. 1. When the question pops up you will only have a short amount of time to write.
2. If you miss it… too bad.

4. 1 Draw and label geocentric and heliocentric model
Earth
Sun
Geocentric
Heliocentric

5. 2 __ proposed the heliocentric model of the solar system.
Nicholas Copernicus

6. 3 Explain geocentric model.
The planets, the Sun, and the moon were fixed in separate spheres that rotated around the Earth.

7. 4 Explain the Big Bang Theory.
About 13.7 billion years ago, the universe began with a huge explosion and continues to expand.

8. 5 Identify if the statements are
true or false.
True
False
Solar System = 4.6 billion
Big Bang = 13.7 billion
False – The steady state theory is also an accepted theory.

9. 6 Identify objects that are part of the solar system.
Sun
Dwarf planets
Planets
Moons
Meteors
Comets
Asteroids

10. 7 Describe evidence that the Universe is expanding.
Galaxies beyond the local group show a red shift when they move away. If they are moving away the universe must be expanding.

11. 8 Describe the location of our sun in the universe.
The sun is 26,000 light-years from the Milky Way Galaxy center in one of the spiral arms. The MWG is located in a unpopulated corner of the universe

12. 9 Describe the location of our Sun in our Milky Way Galaxy.
The sun is about 26,000 light years from the galaxy’s center in one of the spiral arms (Orion).

13. 10 Define a galaxy.
A large group of stars, gas, planets and dust held together by gravity.

14. Because we are located inside of the Milky Way Galaxy.
11 Why can the shape of the Milky Way Galaxy not be seen from Earth?
Because we are located inside of the Milky Way Galaxy.

15. Earth’s (or planets) yearly path around the sun
12 Define revolution.
Earth’s (or planets) yearly path around the sun

16. 13 Inner (Terrestrial) planets and description
Mercury
Rocky planets with an iron core.
Venus
Earth
Mars

17. 14 Outer (Jovian) planets and description
Gas giant, large planets, Hydrogen,
Jupiter
Saturn
Uranus
Helium, Methane, Ammonia
Neptune

18. 15 Similarities of our planets
Elliptical orbit around the Sun
Many have an atmosphere, except for Mercury.
Extreme Temperatures

19. 16 Why do objects appear to move across the sky?
Because the Earth is in motion (rotation)

20. 17 How are Venus and Earth different?
Different Atmospheres
Earth has a moon.
Venus has thick clouds that sun cannot reach the surface.
Earth has liquid water and can support life.

21. 18 What conclusion can you draw about a planet’s distance from the sun and its orbital speed?
The planets closer to the sun travel faster than planets farther away from the sun. Outer planets take much longer to orbit the sun than inner planets.

22. The greater the distance the less the gravitational pull.
19 How does distance affect the sun’s gravity on planets and other objects in the solar system?
The greater the distance the less the gravitational pull.

23. 20 Identify comet, asteroid or meteor.
Comets
Asteroids
Meteor
Asteroid
Comet

24. Letter
Planet
Characteristics 22 A
Mercury
No atmosphere
No moon
Inner most planet
All water is now frozen
Smallest planet in SS
Earth-like characteristics 23 B
Venus
Brightest object in the sky after Sun and Moon.
Spins clockwise
Hottest planet
Smaller in size to the Earth 95% radius of Earth
A day longer than a year 24 C
Earth
One moon
More than 70% covered in water
Only planet to have life 25 D
Mars
Appears red because of rusted soil.
Thinner atmosphere than Earth
Earth like characteristics
Once had active volcanoes
Has canyons, craters, mountains and volcanoes

25. Letter
Planet
Characteristics 26 E
Jupiter
Largest Planet
Has at least 63 moons
Gaseous planet
a large storm, Great Dark Spot
Faint rings of dust
Fastest rotating planet
Larger than Earth
Day is 10 hours long 27 F
Saturn
Second largest planet
1 year 29 ½ Earth years
Lest dense planet
Most impressive ring system 28 G
Uranus
Methane gas
Tipped on side
Spins clockwise 29 H
Neptune
Has large storm system
Atmosphere of hydrogen helium and methane
Coldest planet
Faint ring system
3rd largest planet

26. The End