Space Unit Review

The Big Bang Theory states that 13.7 billion years ago, the universe was:

• a singular point with infinite density and temperature

• a vast expanse of empty space

• a collection of galaxies

• a stable and unchanging entity

The Cosmic Microwave Background is:

• a type of cosmic radiation filling the universe

• a type of star

• a type of galaxy

• a type of black hole

The Solar System consists of what celestial bodies?

• Only planets

• Planets and moons

• Planets, moons, asteroids, and comets

• Only asteroids and comets

What is the path that one object takes around another object in space called? * Example: Earth's orbit is the path it follows around the Sun

• Orbit

• Trajectory

• Pathway

• Route

What is the force that pulls objects toward each other? * Example: Gravity keeps planets circling around the Sun

• Magnetism

• Gravity

• Friction

• Electricity

Which planet formed first in our solar system?

• Mercury

• Venus

• Earth

• Jupiter

The Grand Tack is a hypothesis that explains the early migration of which planet in our solar system?

• Mars

• Jupiter

• Saturn

• Venus

What is Rotation?

• A type of linear motion

• A type of circular motion

• A type of oscillatory motion

• A type of random motion

What does Rotation give us?

• A change in position

• A change in size

• A change in color

• A change in shape

Revolution is:

• a sudden, radical, or complete change

• a gradual change over time

• a minor adjustment

• a temporary change