The largest ocean on Earth.
What is the Pacific Ocean?
The force primarily responsible for tides.
What is gravity?
The process that powers the Sun.
What is nuclear fusion?
The birthplace of stars.
What is a nebula?
A planet outside our solar system.
What is an exoplanet?
Salt in the oceans originally comes from weathered _____.
What are rocks?
The object with the greatest effect on Earth's tides.
What is the Moon?
The four rocky planets are known as these planets.
What are the inner planets?
Star color is most closely related to this property
What is temperature?
A region where gravity is so strong that light cannot escape.
What is a black hole?
Oceans help regulate Earth's _____ by storing and moving heat.
What is climate?
When the Sun, Earth, and Moon are aligned, these tides occur.
What are spring tides?
These planets are mostly made of gas and ice.
What are the outer planets?
Blue stars are generally this compared to red stars.
What is hotter?
This observation shows that the universe is expanding.
What is redshift?
Ocean currents move this around the planet.
What is heat?
When the Sun and Moon pull at right angles, these tides occur.
What are neap tides?
The force that keeps planets in orbit.
What is gravity?
A large collection of stars held together by gravity.
What is a galaxy?
The theory that explains the origin and expansion of the universe.
What is the Big Bang Theory?
Deep ocean water is generally cold, dark, and has this condition.
What is high pressure?
Besides the Moon, this object also affects Earth's tides.
What is the Sun?
Earth's seasons are caused by this.
What is Earth's tilt?
A unit used to measure very large distances in space.
What is a light-year?
Name one major piece of evidence supporting the Big Bang Theory.
What is redshift, cosmic microwave background radiation, or the abundance of hydrogen and helium?