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WorksheetsMod H Unit 2 Lesson 4 - Gravity in the Universe
Total questions: 10
Worksheet time: 2hrs 40mins
The moon revolves around Earth. The moon travels at a speed of about 1 km/s. What keeps the moon in orbit around Earth?
gravity
magnetism
ocean tides
nuclear fusion
Two objects have a certain gravitational fore between them. What would happen if the mass of one of the objects suddenly increased?
The mass of the other object would increase
The distance between the objects would increase.
The gravitational force of the ojects would remain constant.
The gravitational force between the two objects would increase.
Why are Earth, other solar system planets, and most planetary objects spherical?
force of gravity acting evenly in all directions around the center of mass
erosion made by asteroids hitting the object's surface at the time of formation
heat received from the sun melting the objecct's surface at the time of formation
pressure of atmosphere acting evenly in all directions on the object's surface
Planets are held in their orbit because of their large sizes as well as a certain force that acts over a distance. Which force is responsible for acting on the planets?
nuclear force
electrical force
magnetic force
gravitational force
Here is a model of the gravitational force of Mars. Objects A and B have the same mass but are different distances from Mars. Which statement explains how the gravitational force affects the two objects?
Object A and B will be affected equally by the gravitational force.
Object B will be more affected by the gravitational force because it is closer to Mars than Object A.
Object A will be more affected by the gravitational force because it is farther from Mars than Object B.
The satellite is orbiting Earth in the direction shown and is pulled toward Earth by gravity. What would happen if Earth's gravity suddenly disappeared?
The satellite would fall to Earth.
The satellite would stop moving.
The satellite would continue to orbit Earth.
The satellite would move into space in a straight line.
The dotted lines in the picture show orbital paths of objects. Which statement is true about all of the orbits shown?
All objects move in circular orbits.
The size of an object determines the size of its orbit.
The force of gravity is what holds each object in its orbit.
The size of both an object and the object it orbits are equal.
Observe the path of Voyager 2 satellite . Why did the route of Voyager 2 change, without firing its thrusters, as it passed Jupiter?
Gravitational force between Jupiter and Voyager 2 pulled it into a new route.
Solar winds pushed Voyager 2 into a new path.
Jupiter blocked the sun’s gravitational pull on Voyager 2.
The gravity of Jupiter caused Voyager 2 to become its satellite.
Which of the following did engineers need to know to plan Voyager 2’s path through the solar system? Choose *ALL* that apply.
the positions of the planets
the masses of the planets
the mass of Voyager 2
Newton's laws of motion and the law of universal gravitation
The chihuahua is in an elevator. What is the elevator doing at 22 seconds?
It is moving up at a constant velocity.
It is moving down at a constant velocity.
It is accelerating upward.
It is accelerating downward.
