Earth and Life Science Week 1

What contains all galaxies and solar systems?

Universe

What is made up of millions to trillions of stars?

Galaxy

What revolves around a single star?

Solar System

What theory explains the universe originated from an explosion of a dense core?

Big Bang Theory

What theory explains a rapid expansion faster than light occurred just after the Big Bang?

Cosmic Inflation Theory

Which theory believes the universe has no beginning or end and remains constant?

Steady State Theory

What term refers to continuous creation of matter as galaxies move apart?

Infinite Universe Theory

Who proposed the Nebular Hypothesis?

Immanuel Kant and Pierre-Simon Laplace

What caused the nebula to collapse in the Nebular Hypothesis?

Gravitational pull

What shape did the collapsing nebula take?

A pancake with a bulge at the center

Which theory says planets formed from matter torn off the Sun by a passing star?

Tidal Theory

Who proposed the Tidal Theory?

Sir James Hopwood Jeans and Harold Jeffreys

Which hypothesis involves a collision creating tides that formed planetesimals?

Planetesimal Hypothesis

Who proposed the Planetesimal Hypothesis?

Chamberlin and Moulton

What are planetesimals?

Small solid bodies that collided and formed planets

Why is the Big Bang Theory widely accepted?

It explains the expansion and formation of galaxies from a primordial explosion

Does the universe expanding mean Earth is moving away from the Sun?

No, Earth’s distance from the Sun is relatively stable due to gravity

What is the study of the universe called?

Cosmology