Cycles
The Earth's Day and Night Cycle is caused by this.
What is Earth's rotation on its axis?
This force is responsible for keeping the planets in orbit around the sun.
What is Gravity?
This is the farthest planet from the Sun.
What is Neptune?
This type of galaxy has no defined shape.
What is an Irregular Galaxy?
This space object has a tail that always points away from the sun due to solar winds.
What is a comet?
What type of tide occurs when the Sun, Moon, and Earth are aligned.
What is Spring Tide?
When gravitational forces of the Earth and Moon pull in different directions, this type of tide occurs.
What is a neap tide?
These planets are made of mostly gas and ice.
What are the outer planets?
This is the main source of energy in the sun.
What is Nuclear Fusion?
This compares a star's temperature and mass.
What is the Hertzsprung-Russell (H-R) diagram?
This is caused by the changing positions between the Sun, Earth, and Moon.
What are the Moon's phases?
This is the main force responsible for expansion of the Universe.
What is Dark Energy?
What two factors determine a planet's ability to hold an atmosphere?
What is a planet's mass and distance from the sun?
This type of star is smaller and denser than a White Dwarf star.
What is a Neutron Star?
Cosmic background radiation left over from the beginning of the universe supports this theory.
What is the Big Bang Theory?
This type of eclipse occurs when the moon passes between the Earth and the Sun.
What is a solar eclipse?
Gravity pulls planets planets toward the Sun while this force keeps them moving forward, creating an orbit.
What is Inertia?
This is the largest planet in our solar system.
What is Jupiter?
This is a young galaxy with a supermassive black hole.
What is a Quasar?
The sun is a star found in this portion of the H-R diagram.
What is a Main Sequence star?
A solar eclipse occurs during this phase of the moon.
What is New Moon?
TRUE OR FALSE
Gravity is the only force that acts upon a star doing its lifetime.
FALSE!
SURPRISE - NOT THE PLANET CATEGORY!
This space object orbits the Sun in highly elliptical paths.
What is a Comet?
This is the most common type of star in the universe.
What is a Main Sequence star?
As opposed to spiral galaxies that have arms with gas and dust, this type of galaxy has older stars with little gas.
What is an elliptical galaxy?