Earth, moon, and Sun
Earth, Moon, and Sun
Key concept questin
How does Earth move in space?
It rotates on its axis around the sun.
What causes the circle of seasons on Earth?
The rotation of earth on its axis and the rotation of Earth make it face the sun at different angles. Causing the seasons.
Gravity and Motion
Key concept Queations
What determines the strength of the force of the gravity between two objects?
The mass of the object and the distance between them.
What two factors combine to keep the moon and Earth in orbit?
Inertia and gravity.
Phases, Eclipses, and Tides
Key Concept Questions
What causes the phases of the moon?
The changing relative position of the moon, Earth, and sun.
What are solar and lunar eclipses?
A solar eclipse occurs when the moon's shadow hits Earth. A lunar eclipse occurs when Earth's shadow hits the moon.
What causes the tides?
Tides are caused by different in how much the moon's gravity pulls on different parts of the Earth.
Key concept Questions
What features are found on the moon's surface?
Maria, craters, and highlands.
What are some characteristics of the moon?
The moon is dry and airless. Compared to the Earth, the moon is small and has large variations in its surface temperature.
How did the moon form?
Scientists theorize that a planet-sized object collided with Earth to form the moon.