the earth, moon, & sun.
~earth in space.
#1 how does earth move in space?
earth moves through space in two ways, rotation & revolution. rotation~the spinning of earth on its axis. revolution~ the movement of one object around the other
#2 what causes the cycle of seasons on earth?
earth has seasons because its axis is tilted as it resolves around the sun.
~gravity & motion.
#1 what determines the strength of the force of gravity between two objects?
the mass of the object and the distance between them determinants the force of gravity between them.
#2 what two factors combine to keep the moon and earth in motion?
inertia and gravity keep the moon and the earth in orbit.
~phases, eclipses, and tides.
#1 what causes the phases of the moon?
the phases of the moon depend on how much of the sunlit side faces the earth.
#2 what are solar and lunar eclipses?
when the moons shadow hits earth or earths shadow hits the moon, an eclipse occurs
#3 what causes the tides?
the changing relative positions of the moon,earth, and sun cause the phases of the moon, eclipse, and tides.
#1 what features are found on the moons surface?
features of the moon's surface include maria, craters, and highlands.
#2 what are some characteristics of the moon?
the moon is dry and airless. compared to earth, the moon is small ad has large variations in its surface temperature.
#3 how did the moon form?
scientists theorize that a planet size object collided with earth to form the moon.