Gravity Space

Which is a factor that keeps Earth in orbit around the Sun?

• the gravitational pull of the sun

• the continuous motion of the Universe

• the orbital path of the moon

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Which statement best explains why objects are pulled toward Earth’s center?

• Earth has a much greater mass than the objects on the surface.

• The strength of the Sun’s gravity pushes down on objects at Earth's surface.

• The weight of the atmosphere pushes objects toward Earth's surface.

Tags

NGSS.MS-PS2-4

Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

• Planets in motion will have a constant speed unless acted on by an outside force.

• Planets can change the direction of their own orbital path.

• Planets can change orbits due to their inertia.

Which statement describes how Earth compares to the moon?

• Earth has more inertia than the moon.

• The moon rotates at a constant speed while Earth’s speed varies.

• Earth and the moon will not change their motion when acted on by a force.

Tags

NGSS.MS-PS2-4

Which of the moon’s properties prevents it from being pulled inward by Earth?

• inertia

• gravity

• shape

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which remains the same as the distance of an object from Earth changes?

• mass

• gravitational force

• weight

Which causes objects in the universe to resist a change in speed or direction?

• inertia

• gravity

• forces

What does the dotted line arrow show?

• Moon's motion w/o gravity

• force of Earth's gravity

• orbit of moon around Earth

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other. Many stars have planets around them. If there were no gravity attracting a planet to its star, the planet's motion would carry it away from the star. However, when this motion is balanced by the gravitational attraction to the star, the planet orbits the star. Two solar systems each have a planet the same distance from the star. The planets have the same mass, but Planet A orbits a more massive star than Planet B. Which of the following statements is true about the planets?

• Planet A orbits its star faster than Planet B.

• Planet A has a longer year than Planet B.

• Planet B is more attracted to its star than Planet A.

• Planet B will keep orbiting its star longer than Planet A

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following exists around every object that has mass?

• magnetic poles

• electric charges

• a magnetic field

• a gravitational field

Tags

NGSS.MS-PS2-4