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Category 3A Science

8th Grade Science Vocabulary terms for Space Science

waxing To increase gradually in size. The illuminated part of the moon is getting bigger. It is getting brighter.
wavelengths the different energies represented in the electromagnetic spectrum
waning decrease gradually in size. The illuminated part of the moon is getting smaller.
universe All of space and everything in it.
stars Hot, glowing balls of gas that are mostly hydrogen & helium
spring tide Occurs during New and Full Moons (highest high tides and lowest low tides)
seasons Are caused by the tilt of the Earth on its axis; The angle at which the sunlight strikes the Earth
rotation spinning of Earth on its imaginary axis, which takes about 24 hours to complete, and causes day and night to occur
revolution The movement of an object around another object
red shift the change in the wavelength of light due to an object moving away from the observer.
orbit The path of an object as it revolves around another object in space
nebulae massive clouds of dust and gases where stars are born
neap tide When the tidal range is lowest. (first quarter and third quarter moons)
meteor A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
magnitude the brightness of a star
light year light distance travels in one year (9.5 trillion km)
HR Diagram a graph that shows the relationship between a stars magnitude and temperature.
galaxy large group of stars, dust, and gas held together by gravity; can be elliptical, spiral, or irregular
comet a small mass of dust and ice that orbits the sun in a long, oval-shaped path
big bang theory Theory of creation of Universe by instant expansion of an extremely small piece of matter of extremely high density and temperature
axis the center around which something rotates
asteroid a small, rocky object that orbits the sun; most are located in a band between the orbits of Mars and Jupiter.
radiant energy energy that is transmitted in the form of (electromagnetic) radiation
troposphere The layer of atmosphere where weather occurs
ozone layer a layer in the stratosphere (at approximately 20 miles) blocks most ultraviolet radiation from the sun
spectroscope A tool used to observe and analyze different spectrums of light.
constellation a group of stars that form a pattern in the sky
electromagnetic waves energy that travels across distances without a medium; gamma rays, radio waves, etc.
Milky Way The gallaxy in which Earth is located.
Created by: McLeanScience