Solar System
The Sun and the 8 planets that revolve around it.
Planet
Sphere made of rocks and gases
Terrestrial/Inner Planets Gas Giants/Outer Planets
Position
Where an object is located in space.
Sphere
A circular/round three dimensional ball
Orbit
The path an object takes in space.
Compass
An instrument that uses a small magnet to show which direction is North (N)
Sundial
Instrument that measures the time of day by using the position of the Sun
Shadow
A dark area caused when an object blocks light falling on the surface of Earth
Rotation
Earth spins on its axis causing day and night in a 24 hour time period (1 Day)
Axis
An imaginary line Earth spins on; Earth spins on a 24.5 degree tilt
Day
When Earth faces the Sun and is lighted
Night
The time during rotation when Earth does not face the Sun
Rotation causes the Sun to appear as if it moves across the sky. Is it?
No! Rotation makes it look like it is! The Sun is NOT moving across the sky. The Earth is
moving (rotating)! Tricky!!
Revolution
One complete orbit of the Earth around the Sun or the Moon around Earth
Moon
A natural satellite that orbits a planet
Craters
Bowl shaped indents that are caused with a collision with another object such as a meteorite
Mass
The amount of matter in an object
Weight
The force of gravity on an object (how hard gravity is pulling on you)
Gravity
A natural force that causes two objects to pull toward each other depending on their mass and the distance between them
Which changes? Which stays the same?
Earth
A planet in the solar system that has life
Tide
The rise and fall of water in the ocean caused by the moon’s gravitational pull
High Tide and Low Tide
Moon Phase/Lunar Phase
What the moon looks like at different times of the month