Name___________________________
Grade 6
Standard 3: Students will understand the relationship and attributes of
objects in the solar system.
Objective 3: Describe the forces that keep objects in orbit in the solar
system.
1. Gravity is the term used by scientists to describe the…
A. fact that opposite poles attract
B. way heat travels in a system
C. force of objects moving against each other
D. force of attraction between objects
2. Yari is studying gravity. He has learned that the gravity on Mars is about 1/3 of Earth’s
gravity. If Yari weighs 27 kilograms on Earth, how much will Yari weigh on Mars?
A. 27 kilograms
B. 81 kilograms
C. 9 kilograms
D. 0 kilograms
3. If gravity on the moon’s surface is about one sixth of that on Earth’s surface, what will you
weigh on the moon?
A. twice your Earth weight
B. half your Earth weight
C. five-sixths of your Earth weight
D. one-sixth of your Earth weight
4. What does the stronger gravity force of Saturn suggest about the planet?
A. Saturn has storms in its interior.
B. Saturn is still forming.
C. Saturn is very massive.
D. Saturn contains helium gas.
5. What factor affects the gravitational attraction between two objects?
A. surface area
B. circumference
C. volume
D. mass
CDASTM—G6 S3 O3
A joint project between Park City SD, Murray SD, and Life Long Learning & Associates. All rights reserved. 5-2009
1
6. Due to gravitational forces the shapes of most planetary orbits are…
A. circles
B. ellipses
C. squares
D. rectangles
7. What holds our solar system together?
A. magnetism
B. gravity
C. revolution
D. speed of light
8. What effect does the sun have on the revolution of the planets?
A. It keeps all planets in orbit.
B. It is the source of heat and light.
C. It is in the center of the solar system.
D. It causes them to revolve at the same speed.
9. What force keeps objects in orbit in the solar system?
A. gravity
B. rotation
C. mass
D. velocity
10. Which drawing accurately depicts the force that holds the moon in orbit around the Earth?
A.
B.
C.
D.
CDASTM—G6 S3 O3
A joint project between Park City SD, Murray SD, and Life Long Learning & Associates. All rights reserved. 5-2009
2
Grade 6 Standard 3 Objective 3—Answer Key
1. D
2. C
3. C
4. C
5. D
6. B
7. B
8. A
9. A
10. C
CDASTM—G6 S3 O3
A joint project between Park City SD, Murray SD, and Life Long Learning & Associates. All rights reserved. 5-2009
3