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 cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






2. The shadow behind the Earth or Moon where the Sun is partially obscured.






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






4. When massive objects bend space and time enough to create multiple images of an object located behind them






5. The dimming of starlight by intervening dust






6. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






7. Small moons that maintain the shape of rings around Saturn and Uranus






8. The fusion process that turns three helium nuclei into a carbon nucleus






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






10. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






11. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






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






13. A small round distribution of gas surrounding a dying star






14. A particle of light.






15. The material from which the solar system formed






16. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






17. Where is the center of the expansion






18. Clouds of low density gas often found glowing faintly on either side of an AGN.






19. When a planet lines up with the sun inthe sky






20. The process similar to conduction by which energy moves from the solar core to the convective layer






21. Approximate speed of light in a vacuum






22. When the Moon entirely blocks the Sun.






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






24. A planet orbiting about a distant star






25. Any change in the speed or direction of an object's motion






26. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






27. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






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






29. Centered on the sun.






30. Dark - reddish - low-pressure bands in Jupiter's atmosphere






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






32. Mercury and venus






33. A spinning neutron star






34. Earth






35. The displacement of spectral lines to redder colors caused by the expansion of the universe.






36. A telescope that uses lenses to focus light






37. 10^2 nm 10^7 nm






38. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






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






40. Venus






41. Is there water on the moon?






42. A small spherical dark nebula






43. When the Sun is farthest south of the celestial equator (About December 22)






44. A star that is burning hydrogen to helium in a shell surrounding it's core






45. The relation that tells how light dims with distance.






46. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






47. A large and bright but cool star.






48. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






49. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






50. The most mass a white dwarf can have before collapsing to a neutron star