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. All possible types of energy that can be emitted and absorbed by atoms.






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






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






4. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






5. A streak of light in the atmosphere






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






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






8. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






9. Mercury






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






11. The point in its orbit where a planet is nearest the sun






12. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






14. A subatomic particle with a negative charge. It creates light.






15. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






16. Mercury - Venus - Earth - Mars






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






18. The surface of the sun






19. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






21. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






22. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






23. Infinitely long -> 10 cm






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






25. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






26. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






28. The law that predicts the possible types of spectra.

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29. The gap etween saturn's A and B rings






30. Electromagnetic Radiation






31. VENUS






32. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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






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






35. 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






36. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






38. A star that blows itself apart






39. A high-pressure bulge in Neptune's southern hemisphere






40. Elliptical orbits that come inside orbit of the Earth.






41. Why do Galaxies move very rapidly in the interiors of the dense clusters?






42. 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






43. 1 mm 1μm






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






45. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






46. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






47. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






48. A prominence seen against the disk of the sun






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






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