By Bryce Grossman
Earth in Space
How does earth move in space?
Earth moves through space in two major ways: rotation and revolution.
What causes the cycle of seasons on Earth?
Its axis is tilted as it revolves around the sun.
Gravity and Motion
What determines the strength of the force of gravity between two objects?
The masses of the objects and the distance between them.
What two factors combine to keep the moon and earth in orbit?
Inertia and gravity.
Phases, Eclipses, and Tides
What causes the phases of the moon?
The changing relative positions of the moon, earth, and sun.
What are solar and lunar eclipses?
When the moon's shadow hits earth or earth's shadow hits the moon, an eclipse occurs.
What causes the tide?
Differences in how much the moon's gravity pulls on different parts of earth.
Map to Nasa Headquarters
What features are found on the moon's surface?
Maria, Craters, and highlands.
What are some characteristics of the moon?
It is dry and airless. Compared to Earth it is small and has large variations in its surface temperature.
How did the moon form?
A planet-sized object collided with earth to form the moon.