Understand that gravity is the force that governs the motion of our solar system; and
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Q 1/5
Score 0
An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth’s motion?
60
The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth.
The sun moves in an elliptical orbit around Earth, and the sun’s gravity pulls Earth along.
Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.
There is no unbalanced force acting on Earth because space is empty and nothing touches Earth.
Q 2/5
Score 0
In July 1994 the comet Shoemaker-Levy 9 collided with the planet Jupiter, as scientists had predicted. To be able to accurately predict when a comet will collide with a planet, it is essential to understand —
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the attraction of opposite poles of a magnet to each other
the composition of a planet’s atmosphere
the formation of comets
the gravitational attraction that exists between all bodies
5 questions
Q.
An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth’s motion?
1
60 sec
6.11b
Q.
In July 1994 the comet Shoemaker-Levy 9 collided with the planet Jupiter, as scientists had predicted. To be able to accurately predict when a comet will collide with a planet, it is essential to understand —
2
60 sec
6.11b
Q.
The diagram below models Mercury and Venus orbiting the sun. What force causes Venus to travel along a curved path instead of moving in a straight line as indicated by the dashed line in the diagram?
3
60 sec
6.11b
Q.
In July 1994 the comet Shoemaker-Levy 9 collided with the planet Jupiter, as scientists had predicted. To be able to accurately predict when a comet will collide with a planet, it is essential to understand —
4
60 sec
6.11b
Q.
A student makes a model of the sun-Earth system by swinging a ball around her head. Using this model, the student is trying to explain how Earth stays on a path around the sun.
The student explains that this path is the result of —
