Gravity and our Solar System

Which of the following lists contains all of the rocky planets in our solar system?

• Neptune, Mars, Venus, and Mercury

• Earth, Venus, Mercury, and Jupiter

• Mercury, Mars, Earth, Venus

• Mars, Mercury, Earth, and Saturn

A __________ is a chunk of ice & dust that has a bright head & a long narrow tail.

• asteroid
• planet
• meteoroid
• comet

A force of attraction between any two objects is called _____________.

• static electricity 
• rotation
• gravity
• orbit

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

NGSS.MS-PS2-5

The planets in the solar system are so far apart that scientists measure the distances between them in

• miles (mi)

• kilometers (km)

• astronomical units (AU)

• inches (in)

Tags

NGSS.MS-ESS1-3

All the inner planets

• have at least one moon.

• have thick atmospheres.

• are rocky and have a solid outer layer.

• are large.

All the outer planets are made mostly of

• water ice.

• metal and rock.

• gas and liquid around the solid core.

• a rocky surface.

As the mass of objects increases, gravity

• increases

• decreases

• stays the same

Tags

NGSS.MS-PS2-4

As the distance between objects decreases, gravity

• increases

• decreases

• stays the same

What two factors impact a planet's orbit?

• The size of the planet and the velocity of the Sun

• The size of the Sun and the inertia of a planet

• The size of the planet and distance from the Sun

Tags

NGSS.MS-PS2-4

What is the definition of mass?

• how much something weighs

• a measure of how much matter an object has

• a force of attraction between 2 objects

• a force gravity exerts on a body