our solar system a write on activity earth and space science tennessee standard: content standard:...
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Our Solar System
A Write On Activity
EARTH AND SPACE SCIENCE Tennessee Standard:
Content Standard: 7.0 Earth and Its Place in the Universe
The student will investigate the structure of the universe.
Learning Expectations: 7.1 Recognize the basic
components of the universe.
Our Solar SystemOur solar system is made
up of: Sun – Star in the center of
a solar system. Nine planets Their moons – a natural
satellite that orbits a primary planet.
Asteroids Comets
4
Terrestrial vs. Gaseous Terrestrial vs. Gaseous PlanetsPlanetsTerrestrialTerrestrial
Mercury, Venus, Mercury, Venus, Earth, MarsEarth, Mars
1.1. RockyRocky More denseMore dense
2.2. SmallerSmaller
3.3. More closely spacedMore closely spaced
4.4. Closer to the SunCloser to the Sun
GaseousGaseous
Jupiter, Saturn, Jupiter, Saturn, Uranus, NeptuneUranus, Neptune
1.1. Gaseous, has more Gaseous, has more He and HHe and H Less dense (Saturn Less dense (Saturn
would float)would float)
2.2. LargerLarger
3.3. Spaced farther apartSpaced farther apart
4.4. Farther from the SunFarther from the Sun
Inner PlanetsThe inner four rocky
planets at the center of the solar system are:
Mercury Venus Earth Mars
Mercury
Planet nearest the sun Second smallest planet Covered with craters
As a result of having no atmosphere to protect it from foreign objects hitting its surface.
Has no moons or rings About size of Earth’s moon
Venus Sister planet to Earth Has no moons or rings Hot, thick atmosphere
High composition of CO2 Very hot
Brightest object in sky besides sun and moon (looks like bright star)
Covered with craters, volcanoes, and mountains
Earth Third planet from sun Only planet known to have life and liquid
water Atmosphere composed of composed of
Nitrogen (78%), Oxygen (21%), and other gases (1%).
Due to its position in the solar system relative to the sun and composition of atmosphere it makes it an ideal planet for supporting life.
Mars Fourth planet from sun Appears as bright reddish color in the
night sky Surface features volcanoes and huge
dust storms Has 2 moons Most studied planet other than earth.
This is because its characteristics are closest to being able to support life.
ASTEROID BELT
•Most asteroids can be found in the Asteroid Belt, which is located between Mars and Jupiter. Asteroids are rocky and metallic objects that orbit the Sun, but are too small to be considered planets. They are known as minor planets. Asteroids range in size from Ceres, which has a diameter of about 1000 km, down to the size of pebbles.
Asteroids
Small bodies Believed to be left
over from the beginning of the solar system billions of years ago
100,000 asteroids lie in belt between Mars and Jupiter
Largest asteroids have been given names
Meteoroids and Meteorite
Meteoroids are loose dust particles that come from Comeroid. Most areVery small. When it enters Earth’s atmosphere it forms a bright light, ashooting star. Most meteoroids break up in the Earth’s atmosphere.When they break up it is called a meteorite.
Comets
They are like dirty snowballs
Small icy bodies Travel past the Sun Give off gas and
dust as they pass by
Outer Planets
The outer planets composed of gas are :
Jupiter Saturn Uranus Neptune
Jupiter Largest planet in solar
system Brightest planet in sky 60+ moons Strong magnetic field Giant red spot Has small Rings
Saturn 6th planet from sun Beautiful set of rings 31 moons Largest moon, Titan, Easily visible in the
night sky Voyager explored
Saturn and its rings.
Uranus 7th planet from sun Has a faint ring
system 27 known moons Covered with clouds Uranus sits on its side
with the north and south poles sticking out the sides.
Neptune
8th planet from sun Discovered through
math 7 known moons Triton largest moon Great Dark Spot
thought to be a hole, similar to the hole in the ozone layer on Earth
Outermost Planet
Pluto, the outermost planet, is a small solid icy planet is smaller than the Earth's Moon.
There is much debate to its being considered a planet and today it is considered a dwarf planet.
Pluto 9th planet from sun
(usually) Never visited by
spacecraft Orbits very slowly Moon, Charon, is
very close to Pluto and about the same size
Explore the Universe and expand your mind
Susan HammondTTlJune 2003