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Science Test 2
Science packet 2 costelations
| Question | Answer |
|---|---|
| Electromagnetic radiation | Energy that can travel through space in the form of waves. |
| Visible light | The light you can see with your eyes is called_______________. |
| What colors form the spectrum of visible light? | Roy G Biv: Red, Orange, Yellow, Green, Blue, Violet |
| What wavelengths are included in the eletromagnetic spectrum? | Radio waves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma rays. |
| What do telescopes collect and focus? | Light and electromagnetic radiation |
| Refracting telescope | Uses convex lenses to gather and focus light |
| Reflecting telescope | Uses a curved mirror to collect and focus light |
| Radio telescope | Have curved, reflecting surfaces that focus radio waves |
| Which telescope uses convex lenses? | Refracting telescope |
| The largest visible light telescopes are now all ____________. | Reflecting telescopes |
| How is a radio telescope different from both a refracting and a reflecting telescope? | Radio telescopes detect electromagnetic radiation not visible to humans. |
| How is a radio telescope similar to both a refracting and reflecting telescope? | Radio telescopes focuses radio waves the way refracting and reflecting telescopes focus visible light waves. |
| A building that contains one or more telescopes is called a(n) ______. | Observatory |
| Why have astronomers built the largest optical telescopes on the tops of mountains? | Earth's atmosphere makes objects in space look blurry. The sky on some mountaintops is clearer than at sea level and is not brightened much by city lights. |
| Why have astronomers placed telescopes in space? | Some space telescopes are designed to detect visible light or infrared radiation, since Earth's atmosphere interferes with the transmission of these forms of radiation. |
| Why can the Hubble Space Telescope make very detailed images in visible light? | It makes such detailed images in visible light and this telescope orbits above the Earth's atmosphere. |
| What are five characteristics used to classify stars? | color, temperature, size, composition, and brightness |
| The amount of light a star gives off is called its _________. | brightness |
| Imaginary patterns of stars are called _________. | constellations |
| Apparent brightness | The brightness of a star as seen from Earth. |
| Absolute brightness | The brightness the star would have if it were at a standard distance from Earth. |
| What is a light-year? | The distance that light travels in one year. |
| A light-year equals about __________ kilometers. | 9.5 million million |
| Is the following true or false? | The light-year is a unit of time (False). |
| What is parallax? | The apparent change in position of an object when you look at it from different places. |
| Astronomers use parallax to measure the distance to which of the following objects? |
Created by:
mjcool