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 in all directions.'






2. The projection of the Earth's equator onto the celestial sphere.






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






4. The lowest energy of an atom.






5. Electromagnetic Radiation






6. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






7. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






8. The elementary building blocks from which protons and neutrons are formed.






9. The larger bodies that formed early in teh solar nebula that were chemically differentiated






10. The dimming of starlight by intervening dust






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






12. A term referring to the orbital character of stars near the Sun






13. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






14. Dark areas on the sun that are cooler than the surrounding photosphere






15. Jupiter - Saturn - Uranus - Neptune






16. Long - meandering cliff formed when a planet surface cools and shrinks






17. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






18. The process responsible for creating the arms of flocculent spiral galaxies






19. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






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






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






22. A younger cluster of stars - found in the galaxy disk






23. A very dense - highly populated cluster of galaxies






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






25. Mercury and venus






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






27. 10 nm 10^2 nm






28. A force exerted by reflecting sunlight






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






30. Venus






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






32. 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






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






34. Light scattered through the atmosphere that degrades astronomical images






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






36. The name for the only seriously considered theory of the universe.






37. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






38. The entity responsible for spiral arms in grand-design spiral galaxies






39. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






40. 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)






41. The entity from which the whole universe is postulated to have come from.






42. The mirror that gathers the light in a reflector






43. A large and bright but cool star.






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






45. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






46. Jupiter






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






48. The process that powers the sun and hydrogen bombs






49. A perfect absorber and radiator of electromagnetic radiation.






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