Earth Systems Unit 1 Review

substances that are composed of only one type of atom

• molecules

• compound

• element

• protons

attractive force between any two masses

• attraction

• gravity

• accretion

• weight

the measure of the pull of gravity between you and the body you are standing on

• weight

• gravity

• force

• accretion

As mass increases, the gravitational pull will _________

• Stay the same

• Decrease

• Increase

• Not exist

As distance increases, the gravitational pull will _________

• Stay the same

• Decrease

• Increase

• Not exist

What is the most widely accepted theory of how the solar system was created?

• procreation theory

• dust expansion theory

• solar collapse theory

• accreation theory

What made up the giant cloud that became our solar system

• oxygen and carbon

• comets and asteroids

• gas and dust

• stars and planets

What do we call giant solar clouds?

• Auroras

• Gamma Bursts

• Nebulas

• Comets

Why was Pluto removed from being one of the planets?

• it did not meet the three criteria

• it was too far away to be in our solar system

• it fell out of orbit

• it was closer to the sun than originally thought

What is the shape of the orbit of the planets around the sun

• perpendicular

• parallel

• circular

• elliptical