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Category 3A Science
8th Grade Science Vocabulary terms for Space Science
| Term | Definition |
|---|---|
| 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
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