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 word meaning 'the same everywhere throughout.'






2. A quantity measuring the stability of the Earth's atmosphere






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






4. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






5. A word used in astronomy to describe all elements besides hydrogen and helium






6. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






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






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






9. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






10. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






11. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






12. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






13. A location on an H-are Diagram where evolving stars pulsate






14. A star that blows itself apart






15. A huge sphere of tenuous gas surrounding the nucleus of a comet






16. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






17. The location of a supermassive black hole






18. A collection of galaxies like the one the Milky Way belongs to






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






20. A planet that is closer to the sun than the earth






21. The point in its orbit where a planet is farthest from the sun






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






23. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






24. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






25. A fusion process in which protons build together to form helium






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






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






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






29. The north-south line passing directly overhead through the zenith.






30. Sc galaxies






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






32. 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:






33. An important quality of telescopes that increases as the square of the primary mirror or objective lens






34. A two-filter measure of the color - and hence temperature - of a star.






35. A push or a pull






36. The equation that describes how matter equates with energy






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






38. The amount an image is enlarged by a telescope






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






40. Mercury and venus






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






42. A crystalline patter found in iron meteorites






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






44. Jupiter






45. The lens that gathers the light in a refractor






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






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






48. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






49. A small and dim but hot star.






50. 10 cm -> 1 mm