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Eight Planets

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Mars. Mars has the most highly varied and interesting terrain of any of the planets. ... Choose one planet and create a paragraph about it using 4 facts you learned. ... – PowerPoint PPT presentation

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Title: Eight Planets


1
Eight Planets
  • A Write On Activity

2
In this activity you will
  • Learn about the solar system.
  • Practice your knowledge in an interactive game.
  • Select one planet and write a paragraph
    containing four facts you learned.

3
Mercury
  • Mercury is the closest planet to the Sun and the
    eighth largest planet.
  • It has been visited by only one spacecraft,
    Mariner 10.
  • Temperatures vary greatly on Mercury from 90 K to
    700 K.

4
Mercury
  • Mercury is similar to the Moon in that its
    surface is heavily cratered and very old.
  • Mercury actually has a very thin atmosphere
    consisting of atoms blasted off its surface by
    the solar wind.

5
Mercury
  •  Mercury has no known satellites.

6
Venus
  • Venus is the second planet from the Sun and the
    sixth largest.
  • Venus has been known since prehistoric times. It
    is the brightest object in the sky except for the
    Sun and the Moon.
  • Its surface is actually hotter than Mercury's
    despite being nearly twice as far from the Sun.

7
Venus
  • Venus is sometimes regarded as Earth's sister
    planet.
  • Venus is only slightly smaller than Earth
  • Both have few craters.

8
Venus
  • Venus core is similar to that of Earth, an iron
    core.
  • It has no satellites.
  • It is called the "morning star" or the "evening
    star.

9
Venus
10
Earth
  • The Earth is the third planet from the Sun and
    the fifth largest planet.
  • The Earth is divided into 3 main layers
  • The Crust
  • The Mantle
  • The Core

11
Earth
  • The crust is thinner under the oceans, but
    thicker under the continents.
  • Most of the mass of the Earth is in the mantle.
  • The core is probably composed mostly of iron.
  • 71 Percent of the Earth's surface is covered with
    water. It is the only planet on which water can
    exist in liquid form on the surface.

12
Earth
  • Earth has only one natural satellite, the Moon.

13
Mars
  • Mars is the fourth planet from the Sun and the
    seventh largest.
  • Mars has been known since prehistoric times.
  • The first spacecraft to visit Mars was Mariner 4
    in 1965, but several others followed.

14
Mars
  • Mars has the most highly varied and interesting
    terrain of any of the planets.
  • There is evidence of erosion in many places on
    Mars including large floods and small river
    systems (right).

15
Mars
  • Mars has permanent ice caps at both poles.

16
Jupiter
  • Jupiter is the fifth planet from the Sun and the
    largest.
  • It was first visited by the Pioneer 10 spacecraft
    in 1973.
  • Jupiter is a gas planets and does not have a
    solid surface.
  • Its core is composed of rocky material.

17
Jupiter
  • The main bulk of the planet is in the form of
    liquid metallic hydrogen.
  • The outermost layer is composed of ordinary
    molecular hydrogen and helium.
  • The vivid colors seen in Jupiter's clouds are
    probably the result of chemical reactions in
    Jupiter's atmosphere.

18
Jupiter
  • The Great Red Spot is caused by a high-pressure
    region whose cloud tops are significantly higher
    and colder than the surrounding regions.

19
Saturn
  • Saturn is the sixth planet from the Sun and the
    second largest.
  • Galileo was the first to observe it with a
    telescope in 1610.
  • Like Jupiter, Saturn is a gas planet, about 75
    hydrogen and 25 helium.
  • Saturn's rings, unlike the rings of the other
    planets, are very bright.

20
Saturn
  • The rings are actually composed of small
    particles each in an independent orbit.
  • The thin ring particles seem to be composed
    primarily of water ice.
  • Saturn has 18 named satellites plus 13 recently
    discovered.

21
Saturn
22
Uranus
  • Uranus is the seventh planet from the Sun and the
    third largest (by diameter).
  • Uranus, the first planet discovered in modern
    times on March 13, 1781.
  • Uranus has been visited by only one spacecraft,
    Voyager 2 on Jan 24 1986.

23
Uranus
  • Uranus is composed primarily of rock and various
    ices.
  • Like the other gas planets, Uranus has bands of
    clouds that blow around rapidly.
  • Uranus has rings composed of fairly large
    particles.

24
Uranus
  • Voyager 2 discovered 10 small moons in addition
    to the 5 large ones already known.

25
Neptune
  • Neptune is the eighth planet from the Sun and the
    fourth largest (by diameter).
  •  Neptune has been visited by only one spacecraft,
    Voyager 2 on Aug 25 1989.
  • Neptune's composition is probably various "ices"
    and rock.

26
Neptune
  • Being a gas planet, Neptune has rapid winds and
    large storms.
  • Neptune has an internal heat source, radiating
    more than twice as much energy as it receives
    from the Sun.
  • Neptune's most prominent feature is the Great
    Dark Spot.

27
Neptune
  • Neptune has dark rings of an unknown composition.
  • It has 11 known moons.

28
Pluto
  • Pluto was once considered a planet, but is no
    longer. It is now one of the dwarf planets.
  • In the new solar system, there are eight planets,
    at least three dwarf planets and tens of
    thousands of so-called smaller solar system
    bodies, like comets and asteroids.

29
Pluto
  • Little is known about Pluto's atmosphere.

30
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • No longer considered a planet

31
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Has 3 main layers

32
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Closest to the sun

33
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Brightest planet in the sky

34
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Was first observed by Galileo

35
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • The first planet discovered in modern times

36
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Has a Great Dark Spot

37
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • Has permanent ice caps at both poles

38
Can you match the facts?
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Pluto
  • The largest planet

39
Writing Activity
  • Choose one planet and create a paragraph about it
    using 4 facts you learned.
  • Review the planets by clicking the name on the
    right.
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
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