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Space
Vocabulary
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Solar system
Orbit
planet
Asteroid
Comet
Gravity
Revolution
Rotation
Vocabulary
• Solar system- is the sun and the objects that
orbit around it.
• Orbit- is the path an object takes as it moves
around another object in space.
• Planet- is a large body of rock or gas that
orbits the sun.
• Gravity- the force of one object’s pull on
another
Rotation
• Is the spinning of an object on its axis.
• Earth’s axis is an imaginary line that goes
through the North Pole and the South Pole.
Revolution
• A revolution is the movement of one object
around another object.
• For example the Earth makes one revolution
around the sun every 365 ¼ days.
asteroid
• An asteroid is a chunk of rock or metal that
orbits the sun
• There are thousands of asteroids in the
asteroid belt between Mars and Jupiter.
Comet
• A comet is a large ball of ice and dust that
orbits the sun.
• The orbit of a comet is shaped like a large, flat,
oval
The Solar System
• All the planets orbit the sun
• The solar system has eight planets including
Earth.
• Moons are large, rocky objects that orbit
planets.
• Earth has one moon.
The Sun
• The sun is the center of the solar system
• The sun is a star, a hot ball of glowing gases.
• All the planets and moons in our solar system
could fit inside the sun.
The Inner Planets
• The four planets closest to the sun are called the
inner
• Mercury
• Venus
• Earth
• Mars
• The four inner planets all have rocky surfaces,
they are warmer and they are smaller than the
outer planets,
• None of them have more than two moons.
Mercury
• It’s the 1st planet from the sun
• In the daytime Mercury’s surface is hot
enough to melt lead
• Its surface is rocky with many craters
• It has no moons
Venus
It is the 2nd planet from the Sun
Its surface is rocky with constant cover of thick
clouds
It rotates backward compared with most of the
other planets
Earth
• Earth has a watery surface
• It has a lot of oxygen and also it has plant and
animal life.
• It is the 3rd planet from the sun
Mars
• The 4th planet from the Sun
• Mars has a rocky surface with volcanoes,
canyons, and red dust.
• Mars has the largest volcano in the solar
system, Olympus Mons.
The Outer Planets
• The five planets farthest from the sun are called
the outer planets.
• Jupiter
• Saturn
• Uranus
• Neptune
• Pluto
• The outer planets are mad up of frozen gases,
they are colder and they are larger than the inner
planets.
Jupiter
• Jupiter is the 5th planet from the sun
• Two Earths could fit inside Jupiter’s Great Red Spot.
• Jupiter has a huge hurricane like storm on its surface
called the Great Red Spot.
• Jupiter does not have a solid surface it is just cold
slushy gases
• It has 16 moons
Saturn
• Saturn is the 6th planet from the sun
• It has a large system of rings that reaches
260,000 miles from its surface
• Its surface is frozen gases
• It has 18 moons
Uranus
• Uranus is the 7th
planet from the sun
• Uranus rolls on its
side as it orbits the
sun
• It has 15 moons
• And its surface is
made up of frozen
gases
Neptune
• Neptune is the farthest
planet from the sun for 20
year periods when Pluto
crosses it orbit
• It is the 8th planet from the
sun
• It has 8 moons
• Its surface is made up of
frozen gases
Questions
1.) What is a planet?
2.) List three ways the inner planets are alike.
3.) List three ways the outer planets are alike.
4.) How are asteroids and meteorites alike and
how are they different? (create a Venn
diagram)
Questions
1.) What is a revolution?
2.) when it is winter in the northern half of
Earth, what season is it in the southern half?
3.) Why are many places warmer in summer
than in winter?
4.) How would day and night be different if Earth
did not rotate?
References
• http://www.bing.com/images/search?q=solar
+system&FORM=IGRE1&adlt=strict#focal=36a
bca82baf827b22f5c277f99991792&furl=http%
3A%2F%2Fwww.laughtergenealogy.com%2Fbi
n%2Fspace%2Fsolar-system.jpg