1. Late Work Due 12/20/17
If you don’t know where you stand then get your missing work turned in.
13 Days Remaining

2. Bellringer How do greenhouse gases help Earth’s atmosphere?
If you understand the color of a star, what can you determine about the star?
What are sunspots?
What will be the final stage of life for our sun?
Why can’t a star last forever?

3. Group 1
sun

4. Group 2
sun

5. Group 3
sun

6. Additional ?’s
sun

8. Star Light Evidence……
Brightness & color = where it is in its life cycle (its age)
Color = temperature
Composition (elements) = mass: different elements have different masses

9. Solar System & Planets
EQ: How do the components of our solar system interact?

10. Gravity Nothing gets built without gravity
Newton describes the Universal Law of Gravitation
Greater the mass the greater the force
Larger the distance between objects force decreases

11. A. Solar System Solar System composition Solar system formation
-planets, moons, star, asteroids, comets
-Nebula Hypothesis
Cloud of dust & gas (helium & hydrogen) formed spinning disk (solar nebula)
Center gas formed sun
Outer gas form small bodies (planetesimals)

12. Gravitational Collapse
A Pictorial History
Gravitational Collapse
Interplanetary Cloud
Condensation
condensed
Nebular Capture

13. B. Observing the Solar System
Geocentric- earth at center (sun orbits earth)
2. Heliocentric- sun at center (earth orbit sun)

14. C. Planets 1. Revolution- movement around host star
2. Rotation – spinning on the axis of a planet as it moves around (revolves) its host star
3. Two types: Terrestrial (inner) & Jovian
*Make a T-Chart: Terrestrial Vs. Jovian

15. Terrestrial (inner) planets
Jovian planets
-small size & mass
-made of rock & metal
-high density
-solid surface
-no/few moons & rings
-closer to sun & closer together = warmer temps.
-large size & mass
-made of gas (hydrogen, helium, hydrogen compounds)
-low density
-no solid surface
-rings & many moons
-further from sun & each other = cool temps.

16. Planet Team Challenge
You are about to become an interstellar real estate agent! As part of your job you must create an exciting purchasing pitch that will entice your clients to buy your planet.
Solar System

17. Thoughts to Ponder:
When thinking about what to suggest that the buyers take with them on their move and how they will survive consider the following questions...
1. What are the conditions that humans need to live? 2. What is the planets temperature (day/night)? 3. What is the quality of the atmosphere of the planet? 4. What other conditions on the planet are harmful to humans? How could you use these to your advantage? 5. What are the surroundings of the planet like?
6. Describe gravity on your planet? How would humans navigate around planet? Inside what kind of vessel or house would your buyers need to build --remember you must consider what the surface of the planet is made of.

18. Mercury One rotation takes 59 days. One year is 88 days.
It has no moon or rings.
Mercury is the closest planet to the sun.
It looks a lot like our moon.
Click here to
learn about Mercury.

19. a. Mercury- smallest planet, not much larger than the moon.

20. Venus One rotation takes 243 days. One year is 224.7 days.
It has no moon or rings.
Venus is the second planet from the sun.
It is as dry as a desert and hotter than an oven..
Click here to
learn more about
Venus.

21. b. Venus- “Earth’s Twin”, atmosphere is full of clouds & gives a yellow color.

22. Earth One rotation takes 24 hours. One year is 365 1/4 days.
It has 1 moon and no rings.
It is the third planet from the sun.
Earth is mostly covered with water.

23. c. Earth- only planet with known life

24. MARS One rotation takes 24.5 hours. One year is 687 days.
It has 2 moons and no rings.
It is the fourth planet from the sun and the last of the inner planets.
Mars looks red because of rusty iron in its soil and red dust in its air.

25. d. Mars- “red planet”, red color due to iron-rich rocks, large canyons suggest that water was present in the past.

26. Jupiter One rotation takes 9.8 hours. One year is 12 earth years.
It has at least 16 moons and 2 rings.
It is the fifth planet from the sun and the first gas planet.
It has a great red spot of swirling gas.

27. a. Jupiter- largest planet, contains the “Great Red Spot” (huge storm)

28. Maybe ice on Europa?

29. Saturn One rotation takes 10.7 hours. One year is 29.5 Earth years.
It has at least 17 moons and many rings.
Saturn is the sixth planet from the sun and the second gas planet.
Saturn’s rings are made of ice, rock, and dust.

30. b. Saturn- rings made of small ice particles

31. Uranus One rotation takes 17 hours. One year is 84 earth years.
It has at least 15 moons and 10 rings.
Uranus is the seventh planet from the sun and the third gas planet.
Uranus seems to rotate on its side.

32. c. Uranus- rotates on its side

33. Neptune One rotation takes 16 hours. One year is 165 earth years.
It has 8 moons and 4 rings.
It is the eighth planet from the sun and the last gas planet.
Neptune is blue-green.
Neptune

34. d. Neptune- fastest winds in the solar system (1,200 mph)

35. Pluto Is it a planet? One rotation takes 6 days.
One year is 248 earth years.
It has 1 moon and no rings.
It is the ninth, and last planet from the sun, but every 248 years Neptune orbits farther than Pluto.
Charon is Pluto’s moon.

36. E. Pluto Why Pluto is NOT a planet: Pluto & its moon Charon
a. A planet must be:
1.) in orbit around the Sun,
2.) large enough to have become round due to the force of its own gravity
3.) dominates the neighborhood around its orbit.
Pluto & its moon Charon

37. What does the solar system look like from far away?
NASA Figure
Sun, a star, at the center…
Inner Planets (Mercury, Venus, Earth, Mars) ~ 1 AU
They are all rocky planets…
Asteroid Belt, ~ 3 AU
Outer Planets (Jupiter, Saturn, Neptune, Uranus), ~ 5-40 AU
They are all gaseous planets..
Pluto: odd ball planet,

38. The Orbits of the Planets
Described based on work of Kepler
Use data from Brahe to create 3 planetary laws
#1 all planets orbit in an ellipse
Further away from your star the longer it takes to orbit the star

39. Terrestrial and Jovian Planets
Why?

40. The Nebular Theory* of Solar System Formation
Interstellar Cloud (Nebula)
*It is also called the ‘Protoplanet Theory’.
Protoplanetary Disk
Protosun
Gravitational Collapse
Metal, Rocks
Condensation (gas to solid)
Sun
Gases, Ice
Heating  Fusion
Terrestrial Planets
Accretion
Nebular Capture
Jovian Planets
Asteroids
Leftover
Comets
Leftover