Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A particle of light.






2. A telescope that uses lenses to focus light






3. A long-lived high-pressure bulge in Jupiter's southern hemisphere






4. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






5. Large nebula consisting of very cold gas and dust






6. A point in the sky where meteors appear to come from during a shower






7. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






8. 1 mm 1μm






9. The act of removing an electron from an atom.






10. The law that describes the blackbody curve - and let to quantum mechanics.

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11. A bridge of material held in position above the solar surface. They can remain for hours even days






12. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






13. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






14. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






15. A spread of light with an uninterrupted wavelength distribution of energy.






16. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






17. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






18. The study of the universe as a whole.






19. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






20. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






21. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






22. The source of the force that is accelerating the expansion rate of the universe.






23. The distance light travels in one year (=9.46x10^12km).






24. The material from which the solar system formed






25. A small and dim but hot star.






26. Earth






27. The apparent backward motion of a planet against the background of stars.






28. An element of a highly efficient - two-dimensional electronic light detector






29. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






30. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






31. Approximate speed of light in a vacuum






32. What do we think the actual fate of the universe will be and why do we think this?






33. The lens that gathers the light in a refractor






34. A term referring to Jupiter-like planets






35. A change in the appearance of the sun at the edge of the solar disk






36. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






37. The point directly overhead.






38. When one side of a body always faces the planet it revolves around






39. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






40. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






41. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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42. The law that syas light energy from a blackbody increases as (temperature^4)






43. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






44. A repeated - periodic push or pull capable of summing into a larger push or pull






45. The rotation period of the Earth measured relative to the stars.






46. The oldest grouping of stars - found in the galaxy halo






47. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






48. Large nebula consisting of very cold gas and dust






49. A star without enough mass to begin hydrogen fusion






50. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu