Make comparisons.
1. Jupiter / Saturn large
____________________________________________________________________.
2. Neptune / Mars far
____________________________ from the sun ____________________________.
3. Mercury / Venus close
______________________________ to the sun ____________________________.
4. Uranus / Saturn cool
____________________________________________________________________.
5. the sun / the planets hot
____________________________________________________________________.
6. Neptune / Earth cold
____________________________________________________________________.
Fill in the blanks by using the words given in the box. One word is extra.
orbit - find - explore - planets - moons - solar - satellite - evidence - space shuttles
There are eight ____________(1) in our ____________(2) system. The planets ____________(3) the sun, and the ____________(4) turn around the planets. Scientists ____________(5) space by using space telescopes, and astronauts travel in space by ____________(6). Scientists are trying to ____________(7) ____________(8) of water on the planets.