Gravity Geocentric Heliocentric and Extra

Mars, like the other seven planets of the Solar System, orbits the Sun. What keeps Mars in orbit around the Sun?

• the Sun's thermal energy

• the temperature of Mars

• the rotation of Mars

• the Sun's gravitational force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Nebulae are large areas of dust and gas in which stars can be formed. The list below shows some steps that occur in a nebula when a star is formed:

1. A cloud of hydrogen and other gases begins to collapse.
2. As the cloud collapses, the material at the center begins to heat up.
3. A hot core within the collapsing cloud eventually becomes a star.

Which of the following is most likely responsible for the collapse of material during star formation?

• light

• gravity

• magnetism

• friction

Tags

NGSS.MS-ESS1-2

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. Planet A is more massive than Planet B. Which system will have a greater gravitational attraction between them?

• Planet B because it is more massive.

• Planet A because it is more massive.

• Planet A because it is less massive.

• Planet B because it is less massive.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The farther a planet is from the Sun, the ____________ its orbital motion is, and the _______________ the gravitational attraction between the planet and the Sun is.

• slower, weaker

• slower, stronger

• faster, stronger

• faster, weaker

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The closer a planet is to the Sun, the ___________ its orbital motion is, and the ___________ the gravitational force between the planet and the Sun is.

• slower, weaker

• slower, stronger

• Faster, stronger

• faster, weaker

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The motion of a body orbiting another body in space is called _____.

• revolution 
• period of revolution
• rotation
• period of rotation

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The greater mass a planet has, 

• the greater the gravitational force it has
• the less gravitational force it has
• gravitational force does not depend on mass

Tags

NGSS.MS-PS2-4

The spinning of an object on its axis is called______

• orbit
• rotation
• revolution
• tide

Gravity attracts all objects towards one another.

• False
• True
• It depends

Tags

NGSS.MS-PS2-4

What two things determine the gravity of an object?

• mass & weight

• mass & distance

• density & mass

• volume & distance

Tags

NGSS.MS-PS2-4