The Moon & Its Phases
During this lunar phase the entire Moon is visible from Earth.
What is a full moon?
This is the term used when more than half but less than all of the Moon is illuminated.
What is gibbous?
The two main types of craters are these.
What are simple and complex?
This is the name of the most widely accepted scientific theory explaining how Earth's Moon formed.
What is the Giant Impact or Collision Theory?
This term describes the regular rise and fall of ocean water levels.
What is tides?
It takes this many days for the Moon to complete one cycle of phases.
What is about one month or 30 days?
This is a piece of a meteoroid that hits the ground.
What is a meteorite?
This is the material displaced from the land when a crater is formed.
What is ejecta?
Scientists believe the object that collided with early Earth was approximately the size of this planet.
What is Mars?
The gravitational pull of this object is the main cause of Earth's ocean tides.
What is the Moon?
The Moon orbits in this direction around Earth.
What is counterclockwise?
This type of crater typically has a bowl shape.
What is a simple crater?
A meteoroid burning in Earth's atmosphere is called this.
What is a meteor?
Scientists discovered that rocks collected from the Moon have chemical similarities to rocks from this planet, providing evidence supporting the Giant Impact Theory.
What is Earth?
This type of tide occurs when ocean water reaches its highest level along the shore.
What is high tide?
When the lit portion of the Moon's surface is increasing it is called this.
What is waxing?
(Remember: Wax on, Wane off)
The distance from one side of a circle to the opposite side going through the center is call this.
What is diameter?
The Moon has much more craters than the Earth because of this.
What is Earth's atmosphere?
According to the Giant Impact Theory, the Moon formed when this material came together in orbit around Earth.
What are rocks and debris from the collision?
This type of tide occurs when the difference between high tide and low tide is greatest.
What is a spring tide?
This happens to create a solar eclipse.
What is the Moon moves between the Sun and Earth?
This is a dark, relatively flat area on the Moon.
What is a mare or maria (plural)?
Name three properties that could make different crater formations.
What are size, speed and impact angle of the impactor?
This Moon formation theory suggests that the Moon formed somewhere else in space and was later pulled into Earth's orbit by gravity.
What is the Capture Theory?
Neap tides occur during these two phases of the Moon, when the Sun and Moon pull on Earth's oceans from approximately right angles.
What is first-quarter and third-quarter moons?