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. The wavelengths where a specific element can absorb or emit light.






2. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






3. Jupiter






4. The shadow area behind the Earth or Moon where the Sun is completely obscured.






5. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






6. 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)






7. A crystalline patter found in iron meteorites






8. 100 nm 10 nm






9. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






10. The dimming of starlight by intervening dust






11. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






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






14. The rotation of a star or planet at different speeds at its equator and poles






15. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






16. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






17. Orbit in Jupiters orbit






18. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






19. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






20. An empirical scheme for predictin ghe orbital distances of planets






21. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






22. A star without enough mass to begin hydrogen fusion






23. Material that shoots rapidly out into space. Flares cause Auroras






24. Either Io -Europa - Ganymede - or Callisto






25. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






26. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






27. The normal eastward movement of a planet against the background of hte distant stars.






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






29. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






30. A term referring to Earth-like planets






31. How did Earth come to have an oxygen rich atmosphere?






32. First accurately measured the speed of light in a vacuum






33. Then the Sun moves from north to south across the celestial equator (about September 23)






34. Light scattered through the atmosphere that degrades astronomical images






35. The gap inthe outer portion of Saturn's A ring






36. The rock that makes up the lunar maria






37. A plot of star absolute magnitude verses spectral type.






38. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






39. A measure of the force of gravity on an object






40. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






41. 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.






42. The light produced when particles from the sun collide with atmospheric molecules






43. The 'edge' of the universe. Light beyond this has not reached us yet.






44. Large nebula consisting of very cold gas and dust






45. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






46. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






47. The projection of the Earth's equator onto the celestial sphere.






48. The dark - relativley smooth areas on the moon; Latin for sea






49. The rock that makes up the lunar maria






50. How is the Hubble Law consistent with an expanding universe?