1. Unit 7: Beyond Our Planet
6th Grade Science
Unit 7: Beyond Our Planet
Spring 2006, PflugervilleISD
© Spring 2006, Pflugerville ISD, 6th Grade

2. Spring 2006, PflugervilleISD
Unit 7 Beyond Our Planet
Chapter 20: Our Solar System
Section 1: A Solar Family
Section 2: The Nine Planets
Section 3: Moons and Other Bodies
Chapter 21: Exploring Space
Section 1: Rocket Science
Section 4: Living and Working in Space
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3. Spring 2006, PflugervilleISD
A Solar Family
Rotation is the spin of an object in space.
Revolution is the motion of a body as it travels around another body in space.
Chapter 20 Section 1
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4. Spring 2006, PflugervilleISD
A Solar Family
Cite:
Cite:
Rotation/Revolution
Chapter 20 Section 1
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5. Spring 2006, PflugervilleISD
A Solar Family
The earth travels around the sun in a path called an orbit.
Cite:
Chapter 20 Section 1
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6. Let’s Review 1. What is the difference between revolution and orbit?
Chapter 20 Section 1
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7. Spring 2006, PflugervilleISD
A Solar Family
Revolution is the motion of one body around another, while an orbit is the path of an object as the object revolves around another object.
Chapter 20 Section 1
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8. Spring 2006, PflugervilleISD
The Nine Planets
Chapter 20 Section 2
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9. Spring 2006, PflugervilleISD
The Nine Planets
What Do You Think?
Name the nine planets.
Chapter 20 Section 2
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10. Spring 2006, PflugervilleISD
The Nine Planets
In 1610, Galileo
Galilei realized that
planets are not just
points of light – they
are spherical bodies
like the Earth.
Cite:
Chapter 20 Section 2
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11. Spring 2006, PflugervilleISD
The Eight Planets
The solar system is divided into two main parts:
Inner planets and the outer planets.
Cite:
Chapter 20 Section 2
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12. Spring 2006, PflugervilleISD
The Eight Planets
The inner planets are called terrestrial planets because they are small, dense, and rocky like the Earth .
The inner planets are Mercury, Venus, Earth, and Mars.
Cite:
Chapter 20 Section 2
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13. Spring 2006, PflugervilleISD
The Eight Planets
The outer planets, are much larger and are made mostly of gasses thus are called Gas Giants.
The gas giants are Jupiter, Saturn, Uranus, and Neptune.
Cite:
Chapter 20 Section 2
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14. Spring 2006, PflugervilleISD
The Eight Planets
Some planets rotate clockwise (retrograde rotation) while others rotate counterclockwise (prograde rotation).
The planets that have a retrograde rotation are Venus, Uranus, and Pluto.
Chapter 20 Section 2
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15. Spring 2006, PflugervilleISD
The 8 Planets
Mercury is the closest planet
to the sun.
A day = 59 Earth days
(because of slow rotation)
A year = 88 Earth days
Mercury has the biggest range in surface
temperatures.
Chapter 20 Section 2
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16. Spring 2006, PflugervilleISD
The 8 Planets
Venus is more like Earth
than any other planet.
One way it differs,
however, is that Venus
has a retrograde
rotation.
Chapter 20 Section 2
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17. Spring 2006, PflugervilleISD
The 8 Planets
The only planet that is known to support life is Earth.
Earth is warm enough to keep water from freezing and cool enough to keep it from boiling.
Liquid water is a vital resource for life on Earth.
Chapter 20 Section 2
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18. Spring 2006, PflugervilleISD
Chapter 20 Section 2
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Cite:

19. Spring 2006, PflugervilleISD
The 8 Planets
Mars, the red planet, is the fourth planet from the sun. There is strong evidence that water once existed here.
Chapter 20 Section 2
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20. Spring 2006, PflugervilleISD
The 8 Planets
Mars has the
largest mountain in the solar system. The name of the mountain is Olympus Mons and it is an extinct shield volcano.
Citehttp://nssdc.gsfc.nasa.gov/image/planetary/mars/olympus_mons.jpg:
Chapter 20 Section 2
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21. Mar's surface Picture taken by the Viking lander
Chapter 20 Section 2
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Cite:

22. Spring 2006, PflugervilleISD
The 8 Planets
Jupiter is the largest gas giant.
Jupiter radiates much more energy into space than it receives from the sun.
Chapter 20 Section 2
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23. Spring 2006, PflugervilleISD
The 8 Planets
Saturn is the second largest planet.
Saturn is made mostly of hydrogen and helium.
Saturn has the largest rings, which are made of icy particles.
Chapter 20 Section 2
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24. Spring 2006, PflugervilleISD
The 8 Planets
Uranus is a small giant. It may have been tipped over on its side when it was hit by a massive object.
It has a blue-green color due to methane.
Chapter 20 Section 2
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25. Spring 2006, PflugervilleISD
The 8 Planets
Neptune has a great dark spot. It’s atmosphere contains belts of visible clouds.
Chapter 20 Section 2
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26. Spring 2006, PflugervilleISD
The Drawph Planet
Dwarf Planet: a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such..
Pluto, once considered the ninth and most distant planet from the sun, is now the largest known dwarf planet in the solar system.
Cite:
Chapter 20 Section 2
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27. Spring 2006, PflugervilleISD
The 8 Planets
Website to Visit:
Determine your weight on each planet. Remember your weight is determined by the planet’s gravitational pull.
What is my weight on another planet?
Chapter 20 Section 2
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28. Spring 2006, PflugervilleISD
The 8 Planets
Planets farther from the sun tend to have lower surface temperatures; they are space farther apart; their period of revolution is much longer; they are most likely larger and have more moons.
Chapter 20 Section 2
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29. Spring 2006, PflugervilleISD
Moons and Other Bodies
Chapter 20 Section 3
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30. Spring 2006, PflugervilleISD
Moons and Other Bodies
Our moon’s name is Luna. It is about
4.6 billion years old and has numerous impact craters.
The dark areas or lava plains on the moon are called marias.
Cite:
Chapter 20 Section 3
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31. Spring 2006, PflugervilleISD
Moons and Other Bodies
Satellites are natural or artificial bodies that revolve around a larger body.
Moons are natural bodies that revolve around a larger body.
Chapter 20 Section 3
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32. Spring 2006, PflugervilleISD
Moons and Other Bodies
Asteroids are small, rocky bodies that revolve around the sun = stony or metallic
Many are found in the asteroid belt between Mars and Jupiter.
Cite:
Chapter 20 Section 3
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33. Spring 2006, PflugervilleISD
Moons and Other Bodies
Ceres is the largest known asteroid.
Cites:
Chapter 20 Section 3
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34. Spring 2006, PflugervilleISD
Moons and Other Bodies
Meteoroids are like asteroids but smaller.
Meteorites are meteoroids that hit the ground.
Meteors are the bright streaks of light in the sky.
Cite:
Chapter 20 Section 3
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35. Moons and Other Bodies Three Types of Meteorites:
Stony made of rock material.
Metallic made of iron and nickel.
Stony-iron made of rocky material
iron and nickel.
Open you textbook to page 561 to look
some pictures of these types of meteorites.
Chapter 20 Section 3
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36. Spring 2006, PflugervilleISD
Moons and Other Bodies
Comets are small body of ice, rock and cosmic dust.
They are also known as “snowy dirtball”.
Cite:
Chapter 20 Section 3
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37. Spring 2006, PflugervilleISD
Moons and Other Bodies
Parts of a Comet:
Nucleus is the solid center.
Ion tail is made of electrically charged particles.
Dust tail is dust debris due to the sun’s radiation.
Chapter 20 Section 3
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38. Spring 2006, PflugervilleISD
Moons and Other Bodies
Comets orbit is elongated.
The tail always blows away from the sun due to solar winds.
Cite:
Chapter 20 Section 3
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39. Spring 2006, PflugervilleISD
Moons and Other Bodies
Animation of a Comet
Cite:
Chapter 20 Section 3
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40. Spring 2006, PflugervilleISD
Moons and Other Bodies
Website to Visit:
Let’s look at some photos of comets : icy bodies that orbit the sun.
Chapter 20 Section 3
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41. Spring 2006, PflugervilleISD
Moons and Other Bodies
The solar system is a large system that is made up of smaller systems, such as Jupiter’s system.
Chapter 20 Section 3
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