Earth Science Quiz

How many estimated galaxies are there in the universe?

• 10 billion

• 100 billion

• 1 trillion

• 500 billion

What is the Milky Way Galaxy?

• A type of star

• A galaxy containing our solar system

• A planet

• A nebula

What does the Nebular Hypothesis explain?

• The formation of stars

• The formation of galaxies

• The formation of our solar system

• The structure of black holes

What causes a nebula to begin collapsing?

• Heat from nearby stars

• Its own gravity

• Cosmic radiation

• The presence of planets

What happens to particles in a collapsing nebula?

• They disperse into space

• They freeze

• They start to move and collide

• They stop moving

Who developed the Protoplanet Theory?

• Isaac Newton

• Albert Einstein

• Gerald Kuiper and Carl von Weizsäcker

• Stephen Hawking

What did Harold Urey contribute to?

• Black hole theory

• Understanding of rocky planet formation

• The Big Bang Theory

• The study of dark matter

What does the Accretion Theory explain?

• The explosion of stars

• How planets formed from small space bodies

• The movement of galaxies

• The lifespan of stars

Who proposed the Accretion Theory?

• Victor S. Safronov

• Albert Einstein

• Carl Sagan

• Neil deGrasse Tyson

What other scientists contributed to the Accretion Theory?

• James Jeans and Harold Jeffreys

• Galileo and Copernicus

• Edwin Hubble and Max Planck

• Richard Feynman and Niels Bohr