Front

What are the two factors that keep Earth and the moon in their orbits?

Back

Gravity and orbital speed.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Front

What caused the solar nebula to heat up initially?

Back

Particles moved closer together, causing friction.

Front

Why is the Earth round?

Back

The force of its gravity became strong enough to crush the rock at its center.

Tags

NGSS.HS-PS2-4

Front

Why is the gravitational force between the Sun and the next nearest star not very strong?

Back

Objects that are very far away don't exert much gravitational force on each other.

Tags

NGSS.MS-ESS1-2

Front

What do all of the inner planets have in common?

Back

They are small and have rocky surfaces.

Front

What is the solar system?

Back

The solar system is a collection of celestial bodies, including the Sun, planets, moons, asteroids, and comets, bound by gravity.

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

Front

What is a planet?

Back

A planet is a celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.

Front

What is the difference between inner and outer planets?

Back

Inner planets are rocky and smaller, while outer planets are gas giants and larger.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies toward each other, depending on their masses and the distance between them.

Tags

NGSS.HS-PS2-4

Front

What is an orbit?

Back

An orbit is the curved path of an object around a star, planet, or moon due to gravitational forces.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2