our solar system - Science to a Tee · 2019-11-24 · The Sun The sun is the biggest, brightest,...
Transcript of our solar system - Science to a Tee · 2019-11-24 · The Sun The sun is the biggest, brightest,...
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Our Solar System
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The Sun● The sun is the biggest,
brightest, and hottest object in our solar system.
● The sun is an ordinary star.
● The sun is made of about 70% hydrogen and 28% helium.
● It makes up almost 99% of our solar system’s mass!
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The Inner Planets
The Outer Planets
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THE INNER PLANETS● Rocky, cratered surfaces ● smaller than outer planets ● closer to the Sun ● very few moons compared to the outer
planets
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Mercury(Roman messenger god)
● Mercury is solid and is covered with craters.
● has no atmosphere, but water vapour has been found.
● The smallest planet.
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Venus (Roman goddess of beauty) ● It’s almost the same size
as Earth. ● The surface is rocky and
very hot with volcanoes and mountains.
● The atmosphere completely hides the surface and traps the heat.
● Days are longer than years!
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Earth● Earth is the fifth largest planet and the third
from the sun. ● Liquid covers almost 75 percent of the Earth’s
surface. ● The Earth has one moon.
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Mars(Roman god of war)
● Mars is the fourth planet from the sun.
● Mars has a thin atmosphere that contains mostly carbon dioxide.
● Mars has two small moons, rust in the soil, and maybe life.
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THE OUTER PLANETS● Gassy atmosphere with no solid surface ● Very large compared to inner ● Far away from the Sun ● Have rings ● Have numerous moons
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Jupiter(Roman ruler of gods/goddesses)
● The largest planet. ● Gas giant. It is a ball
of liquid surrounded by gas – mostly hydrogen and helium.
● The Great Red Spot, a huge storm of swirling gas, has lasted for hundreds of years.
● 60+ moons
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Saturn (Roman god of agriculture)
● Saturn is the second largest gas giant planet. ● 60+ known moons. ● Saturn’s rings are not solid; they are composed
of small particles. ● The rings are very thin. Though they’re 250,000
km or more in diameter, they’re less than 1 km thick.
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Uranus(Greek god of the sky)
● Ice giant ● Looks blue-green
because of a methane in its atmosphere.
● 27 known moons. ● Has a faint ring
system. ● Rotates on a 90o tilt!
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Neptune(Roman god of the sea)
● Ice giant ● temperature of
-353oC. ● Like Uranus, the
methane gives Neptune its colour.
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Dwarf Planets● There are 5 bodies to small to be planets ● They orbit (but not circular) the sun ● They have a spherical shape
eg Pluto, Eris, Makemake, Haumea, Ceres
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Other Bodies● Asteroids -Rocky / metallic objects that
orbit the sun (Asteroid belt, or Kuiper Belt)
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Other Bodies● Meteoroid- small rock/metallic pieces
drawn in by the Earth’s gravity.
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Chicxulub Crater, Mexico 65 mya
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Other Bodies● Comets-chunks of rocks and ice that orbit
the sun. eg. Halley’s comet (76 yrs)
Hale-Bopp (2380 yrs)
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