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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