axis
An imaginary line that passes through Earth's center around which the Earth spins
Season
Caused by the tilt of Earth on its axis as it revolves around the Sun
Waning Moon
When the Moon appears to get smaller
Full Moon
The moon's illuminated side faces earth and appears as a fully lit disk.
Indirect Sunlight
bright light that does not shine directly
Solar Eclipse
An event happens when the moon is between Earth and the Sun and the moon's shadow falls on Earth.
Tide
The rise and fall of the level of water in the ocean
Waxing Moon
When the Moon appears to get bigger
Revolve
to go around something in a circle; to turn around in a circle
Mass
the total amount of "stuff" or matter inside an object.
Lunar Eclipse
An event that happens when Earth is between the sun and the moon, and Earth's shadow falls on the moon.
Spring Tide
a type of super-high tide that happens twice a month during a full or new moon
New Moon
A moon that is completely dark because its unlit side is facing Earth
Orbit
The path of an object as it revolves around another object in space.
Weight
a measure of how heavy an object is, determined by the pull of gravity on it
Gravitational Forces
The forces are determined by the mass of an object.
Neap Tide
The tide with the least difference between consecutive low and high tides
Crescent Moon
Less than half of the moon is visible from earth.
Hemisphere
exactly half of the Earth, similar to cutting an orange or a ball in half.
Solar System
our "space neighborhood," consisting of the Sun and everything that travels around it due to gravity, including eight major planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), dwarf planets, moons, and asteroids. It is located in the Milky Way galaxy.
Rotation
To turn around an axis or center point
Moon Phases
The changes shapes of the moon, caused by its 29.5 day orbit around the Earth.
Gibbous Moon
Shape of the Moon that is greater than a quarter moon, but not full.
Direct Sunlight
when light travels straight from the sun to you without being blocked by clouds, trees, or buildings
Sun
The star that is the central body of the solar system, around which the planets revolve and receive light and heat.