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 fusion process in which protons build together to form helium






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






3. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






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






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






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






7. Mercury






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






9. Sc galaxies






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






11. A star that is in the process of forming. It glows from gravitational contraction






12. The oldest part of the Milky Way






13. The location of a supermassive black hole






14. The process that powers the sun and hydrogen bombs






15. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






16. Mercury






17. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






18. 10^2 nm 10^7 nm






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






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






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






22. The equation that describes how matter equates with energy






23. The crust of a meteorite caused by its entry into Earth's atmosphere






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






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






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






27. The imaginary sphere centered on the Earth that hols the stars.






28. A push or a pull






29. A faint - remarkably uniform distribution of radiation in space






30. The rotation period of the Earth measured relative to the Sun.






31. A term referring to Earth-like planets






32. Centered on the Earth






33. A small chunk of rock in space






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






35. The high- temperatature outer layer of the sun






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






37. What is the universe expanding into?






38. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






40. The oldest terrain on the moon






41. Radiation given off by electrons accelerating in a magnetic field






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






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






44. A galaxy sending out a stream of material from its nucleus






45. A faint - remarkably uniform distribution of radiation in space






46. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






47. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






48. A streak of light in the atmosphere






49. A volume of space where few - if any - galaxies are located






50. The dimming of starlight by intervening dust