Worksheets8th 4.1 Introducing The Solar System
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Scientists think the solar system formed about _________
a)
4.6 million years ago
b)
4.6 billion years ago
c)
4.6 hundred thousand years ago
d)
4.6 thousand years ago
2.
About 99.85 percent of the mass of the solar system is contained within the ______
a)
axis
b)
moon
c)
galaxy
d)
sun
3.
It takes one day for a planet to rotate on its _______
a)
axis
b)
zodiac
c)
equator
d)
poles
4.
Planetesimals collided, stuck together, and eventually combined to form all the other objects in the ____________
a)
universe
b)
zodiac
c)
galaxy
d)
solar system
5.
The sun is a _____
a)
asteroid
b)
planet
c)
star
d)
planetsimal
6.
_____ , once the ninth planet in the solar system, is now considered a dwarf planet.
a)
pluto
b)
jupiter
c)
mars
d)
earth
7.
The solar system began to form as _____ pulled rock, ice, and gas together.
a)
poles
b)
force
c)
gravity
d)
speed
8.
Scientists use the ________ to measure distances within the solar system
a)
planetesimal unit
b)
astronomical unit
c)
stars
d)
equator
9.
All but two planets in the solar system have a natural satellite, or _____
a)
star
b)
poles
c)
zodiac
d)
moon
10.
The four outermost planets in the sun’s orbit are mostly made of liquid and ____
a)
gas
b)
moons
c)
stars
d)
asteroids
100 %
