Earth, Moon, Sun
By Peyton Raypholtz
Section 1 Earth in Space
How does Earth move in space?
Earth moves in space in two major ways, rotation and revolution.
Rotation:The imaginary line that passes through Earth's center is Earths axis. The spinning on earths axis is called rotation.
Revolution: Earth travels around the sun. The movement of one object around another is called revolution.
What causes the cycle of seasons on earth?
There are seasons on earth because Earth's axis is tilted as it revolves around the sun.
The north end of Earth's axis is tilted toward the sun so it is summer in the northern hemisphere and not in the southern hemisphere.
The south end of Earth's axis is tilted toward the sun so it is summer in the southern hemisphere and not in the northern hemisphere.
Section 2 Gravity and Motion
What determines the strength of the force of gravity between two objects?
The Strength of the force of gravity between two objects depend on the mass of the objects and the distance
Mass: Higher the mass more the pull of gravity. lower the mass means less pull of gravity
Distance: Higher distance equals lesser pull and lower distance higher the pull of gravity.
What two factors combine to keep the moon and Earth in orbit?
Inertia and gravity together keep the Earth in orbit around the sun.
Inertia: the tendency of an object to resist a change in motion.
Section 3 Phases, Eclipses and Tides
What causes the phases of the moon?
The changing positions of the moon, Earth and sun causes the phases of the moon.
What are solar and lunar eclipses?
Solar: When the moon passes directly between Earth and the sun.
Lunar: When the earth blocks sunlight from reaching the moon.
What causes the tides?
Tides: caused mainly by the differences in how much the moon's gravity pulls on different parts of the earth.
Section 4 Earth's moon
What features are on the moon's surface?
Craters: were caused by the impact of meteoroids.
Maria: hardened rock formed from huge lava flows that occurred between 3 and 4 billion years ago.
Highlands: The light-colored features that cover much of the moons surface.
What are some characteristics of the moon?
The moon is dry and airless. compared to Earth, the moon is small and has large variations in its surface temperature.
How did the Moon form?
Scientists Theorize that when the earth was very young a planet sized object collided with earth. Material from the object and Earth's other layers was injected into Earths orbit forming a ring. Gravity caused these materials to combine to form the moon.