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Space: chpt. 1 vocab

6TH GRADE Chapter 1 space vocabulary.

Astronomy The study of the moon, stars, and other objects in space.
Axis The invisible point about which a planet rotates.
Rotation Spinning about an axis.
Revolution When one object revolves around another object in space.
Orbit The path that an object revolves on.
Latitude Imaginary lines that run West to East, and measure distances North and South.
Solstice When the noon sun is overhead at 23.5 degrees south or 23.5 degrees north. Longest and shortest days of the year.
Equinox Equal daylight and night.
Vernal Equinox The equinox occurring in the springtime. Marks the beginning of Spring. Around March 21st.
Autumnal Equinox The equinox occurring in the fall. Marks the beginning of fall. around September 21st.
Phase The different appearances of the moon as it goes through its monthly cycle.
Eclipse Either solar or lunar eclipses can occur.
Solar Eclipse When the moon comes between the Earth and the sun. A shadow is cast on the Earth. Only happens during the new moon.
Umbra The darkest part of the shadow when an eclipse happens.
Penumbra The lightest part of the shadow when an eclipse happens.
Lunar Eclipse When the Earth envelopes the moon in shadow. Only happens when the moon is full.
Tide The rise and fall of water levels.
Gravity The force that keeps all things on the surface of Earth. Gravitational pull depends on mass and distance.
Spring Tide "Super Tide." Only happens in this order (sun,moon,earth)
Neap Tide A smaller tide than spring tide. Only happens when the sun is at a right angle to the moon.
Satellite Any natural or artificial object orbiting another object in space.
Geosynchronous Orbit When an object revolves around Earth at the same rate that Earth rotates. It appears to hover over one spot.
Telescope An instrument used to make objects appear closer than they really are.
Crater Round pits formed by impacts of meteoroids.
Maria Dark, flat regions. Galileo named them maria, the Latin word for "seas."
Created by: 20pennel