Solar System Test 6th Grade

6.What is the most important requirement for a manned spacecraft?

19.An asteroid is bigger than a meteoroid.

9.To enter space, a rocket must overcome-

12.A celestial object composed of ice, rock and frozen gas that exhibits a tail is a-

5.The inner planets are-

1. A visible streak of light that shows the path of a rocky object is-

2. Planets orbit the sun because of-

18.Our sun is the biggest star in the universe.

14.Galilean moons belong to-

17.Io, Europe, Ganymede and __________________ are the four Galilean moons.

4.The Sun is composed of-

3. The science tool that advanced space exploration is the-

11.The moon is our natural satellite because-

13.The center of our solar system is the-

10.Earth revolves or orbits-

15.Mercury and Venus have moons.

20.There is water on the moon.

16.The dark spots on the moon are known as-

8.The Sun and all the planets are-

7.The asteroid belt is between-