What is a celestial body? Examples?
any object that we can OBSERVE IN SPACE (galaxies, stars, planets, suns, asteroids, etc.)
What is the difference between the ORBIT of a planet and a satellite?
planets orbit the SUN, satellites orbit PLANETS
Why is gravity important on Earth?
it keeps all living things and objects ON THE SURFACE of the Earth (we don't fall off the earth!)
Which is bigger, the UNIVERSE or a GALAXY?
The UNIVERSE (it contains BILLIONS of galaxies)
What makes up a Solar System?
a SUN and all the celestial bodies that move around it.
What is the ONLY celestial body in the Solar System that makes its own light?
the SUN
What is the Big Bang? What did it create?
a GIGANTIC EXPLOSION in space that created THE UNIVERSE
In which galaxy is our Solar System located?
the MILKY WAY
What do you call a NATURAL satellite that orbits a planet?
a MOON
True or False: The Earth's different systems depend on and influence each other.
TRUE
What do you call the path that an object takes as it revolves around another object in space?
an ORBIT
The Earth is not completely spherical. Where is it flatter?
at the POLES
Why is there life on Earth? (4 things)
the ATMOSPHERE (oxygen); the DISTANCE FROM THE SUN (light and heat); the MAGNETIC FIELD (protection); WATER (in liquid form)
What are the Earth's 4 systems?
the GEOSPHERE, BIOSPHERE, HYDROSPHERE and ATMOSPHERE