Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Mr. Belyea
Astronomy Lesson 3
| Question | Answer |
|---|---|
| spectroscope | an instrument that separates light into a pattern of lines of different colors |
| how do astronomers study objects in space | by observing the light and other forms of radiation they give off |
| what do the tools do | record, focus,magnify and analyze the light and other radiation |
| what does it mean to analyze something | to separate it into its parts so it can be studied |
| what does a prism do | it separates white light or sunlight into a rainbow spectrum, or pattern of colors |
| how can a spectroscope analyze light from a glowing star | it can separate the light into bands or patterns of light |
| what does each element in the star have | its own pattern |
| why do astronomers study the light patterns of a star | to find out what elements a star contains |
| what do telescopes do | make distant objects look clearer and show detail |
| how do telescopes make distant objects look clearer | mirrors and lenses in telescopes bend and focus light to produce an image with more detail |
| what does a lens do | magnify objects |
| what does the lens in your eye do | focuses light and produces an image |
| refraction | the bending of light as it passes from one material to another, a way to gather and focus light |
| reflection | the bouncing of light off a surface, a way to gather and focus light |
| what are two ways to gather and focus light | refraction and reflection |
| how does a lens work | by refraction or bending the light as it passes from one material to another |
| how the light bends as it passes through the lens depend on | the shape of the lens |
| how do mirrors work | by reflection or bouncing light off a surface |
| what does changing the shape of a mirror do | changes the direction of light that bounces off it |
| how do optical telescopes work | the produce images by focusing light rays, refraction or reflection |
| what were one of the first important discoveries made with a refracting telescope | that there are craters on the moon |
| what problem did the reflecting telescope solve | blurred images with the refracting telescope |
| what kinds of radiation do stars give off | visible light waves and radiation that cannot be seen by the human eye |
| why cant the radiation be seen by the human eye | the wavelengths are shorter of linger than visible light, they are too short or too long for the eye to detect |
| what can scientist use to see radiation that cant be seen by the human eye | radio telescope, satellites in space |
| what do the radio telescopes and satellites in space do | collect and make images from these invisible kinds of radiation |
| radiotelescope | collect and measures the radio waves that objects in space give off, can see dust clouds in dark parts of the sky |
| infrared rays | have longer wavelengths that visible light |
| infrared telescope | collects infrared rays from objects in space, has an infrared detector instead of eyepiece |
| how do astronomers record images from optical telescopes | they use film or photographic plates |
| how does film collect images | it can be exposed for a long time, so it can collect enough light to make dim objects appear bright. |
| electronic detectors | used with telescopes-record images from space, they collect light or other rays and change their radiation pattern into a pattern of electrical charges and shown as picture on computer screen. different wavelengths of radiation appear as different colors |
| what are telescopes in space attached to | rockets or satellites |
| what is the advantage telescopes in space have over telescopes on Earth | they can record the light and radiation from objects in space without the radiation passing through the Earths atmosphere |
| why do telescopes on Earth take blurry images | because as the light passes through the earth atmosphere it contains many particles including water vapor, dust, carbon dioxide. |
| what else will affect the way light moves through air | temperature of the air will keep a lens from focusing clearly |
| why do infrared telescopes have to be cooled in cold of space | when studying infrared rays in space, heat absorbed by the telescope can affect the image |
| what blocks infrared rays in the earths atmosphere | carbon dioxide and water vapor |
| where are infrared rays placed to avoid blurry images | very high mountains or satellites |
| concave | makes light rays spread apart |
| convex | brings light rays together |
Created by:
mloft
Popular Earth Science sets