EARTH, MOON, SUN
EARTH IN SPACE
Q: How does earth move in space?
A: Earth spins on a tilted axis that orbits around the sun.
Q: What causes the cycle of the seasons on earth?
A: The tilt in the axis causes the seasons because some parts of the earth receive more direct sunlight then others
GRAVITY AND MOTION
Q: What determines the strength of the force of gravity between two objects?
A: The mass of an object and the distance between the two obects
Q: what two factors combine to keep the moon and Earth in orbit?
A: Inertia and gravity are the two factors that keep the moon and earth in orbit.
PHASES, ECLIPSES, AND TIDES
Q: what causes the phases of the moon?
A: the changing relative positions of the moon, Earth, and sun cause the phases of the moon, eclipses, and tides.
Q: What are the solar and lunar eclipses?
A: when the moon's shadow hits earth or earth's shadow hits the moon, an eclipse occurs.
Q: What causes the tides?
A: tides are caused mainly by differences in ow much the moo'n gravity pulls on different parts of Earth.
Q: What features are found on the moons surface?
A: There are craters on the surface of the moon. Craters are large round pit marks on the moons surface.
Q: What are some characteristics of the moon?
A: The moon is dry and airless. Compared to the earth the moon is small and has large variations in its surface temperature.
Q: How did the moon form?
A: The theoy that shows how the moon form is called the collision-ring theory. The theoy suggests that about 4.5 billion year ago, when the earth was very young, the solar system was full of rocky debris. Some of this debirs was the size of small planets. Scientits theorize that a planet-sized object collided with earth to form the moon.