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 Greek philosopher responsible for making the stellar magnitude scale.






2. Centered on the sun.






3. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






4. An entity that is likely in the nucleus of most - if not all - galaxies.






5. Matter so dense that even light cannot escape its gravity






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






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






8. A representation of the changes in color and brightness of an evolving protostar.






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






10. 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.






11. Moon in less than the angular diameter of the Sun.






12. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






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






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






15. Poitns of gravitational stability in the orbit of a planet






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






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






18. Infinitely long -> 10 cm






19. The surface of the sun






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






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






22. In what chemical form are jupiters nitrogen - carbon and oxygen?






23. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






24. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






25. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






26. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






27. 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.






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






29. A term referring to Earth-like planets






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






31. The oldest terrain on the moon






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






33. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






34. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






35. When material is heated and moves taking the heat energy with it






36. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






37. Matter so dense that even light cannot escape its gravity






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






39. Hot cells of gas that rise and fall in the hotosphere






40. The slow wobble of the Earth on its rotation axis.






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






42. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






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






44. Approximate speed of light in a vacuum






45. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






46. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






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






48. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






50. Is there water on the moon?