ESS 1-2 Gravity in Galaxies Flashcard

Front

What is the main reason planets orbit the Sun?

Back

Because the Sun has the most mass.

Front

What force causes objects in the solar system to move in orbits?

Back

Gravitational pull of the Sun.

Front

Order these from smallest to largest: planet, solar system, galaxy, universe.

Back

Planet, solar system, galaxy, universe.

Front

Which is larger: a galaxy or a solar system?

Back

A galaxy.

Front

What does gravity depend on?

Back

An object's mass.

Front

What is the largest known structure in the universe?

Back

The universe itself.

Front

What is a galaxy?

Back

A massive system of stars, star clusters, dust, and gas bound together by gravity.

Front

What is the solar system?

Back

A collection of planets, moons, asteroids, comets, and other celestial bodies that orbit the Sun.

Front

What is the role of the Sun in the solar system?

Back

It provides the gravitational force that keeps the planets in orbit.

Front

What is mass?

Back

The amount of matter in an object, which affects its gravitational pull.