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Barnett 6th grade 18

Barnett - 6th grade science - Chapter 18 vocabulary

QuestionAnswer
astronomy The study of the moon, stars and other objects in space.
axis The imaginary line that passes through earth’s center and the North and South poles.
rotation Object spinning on its axis. Causes day and night
revolution The movement of one object around the sun. Causes a year.
orbit Earth’s path as it revolves around the sun.
latitude A measurement of distance from the equator -- expressed in degrees north or south of the equator
solstice The two days each year when the noon sun is at either 23.5 degrees south or north -- axis is either pointed directly toward or directly away!
equinox The two days each year when the sun is directly overhead at the equator – means “equal night” -- Not pointed directly toward or away.
vernal equinox Spring equinox that occurs around March 21, and marks the first day of spring in the Northern Hemisphere
autumnal equinox Occurs around September 23 and marks the first day of fall in the Northern Hemisphere
phase The different shapes of the moon that depend on how much of the sunlight side of the Moon is facing Earth
eclipse when the moon’s shadow hits earth or Earth’s shadow hits the moon. When an object in space comes between the sun and a third object, and casts a shadow on that object
solar eclipse When the moon passes between the earth and the sun, blocking the sunlight from reaching Earth.
umbra Darkest part of the shadow – this is there the sun is totally blocked
penumbra Lighter part of the shadow – only part of the suns rays are blocked
lunar eclipse Occurs at a full moon when the Earth is directly in line between the moon and the sun
tide The rise and fall of ocean water due to the differences in the moon’s gravitational pull on the earth – change every 12.5 hours or so
gravity The force that pulls the moon and earth (including the water on the Earth’s surface) toward each other
satellite Any natural or artificial object that revolves around another object in space
geosynchronous orbit An orbit where the object revolves at the same rate that earth rotates. This means that the object seems to hover over one spot
telescope Tool that makes objects that are very far away appear closer than they are. Changed the science of Astronomy!
crater Round pits on the surface of the moon
maria Dark, flat that are dry and were once flooded with molten material.
Created by: ebarnett
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