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 change in the appearance of the sun at the edge of the solar disk






2. A star that is burning hydrogen to helium in a shell surrounding it's core






3. When the Sun is farthest north of the celestial equator (about June 22)






4. The process that powers the sun and hydrogen bombs






5. Is there water on the moon?






6. The telescope configuration that has the focus placed at the back of the primary mirror






7. 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






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






9. The distance a moon can be from a planet before shattering from tidal forces






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






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






12. Is there water on the moon?






13. A perfect absorber and radiator of electromagnetic radiation.






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






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






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






17. 10 cm -> 1 mm






18. Europa






19. Sc galaxies






20. The study of the universe as a whole.






21. The wavelengths where a specific element can absorb or emit light.






22. Jupiter - Saturn - Uranus - Neptune






23. The mirror that determines the focus configuration of a reflector






24. A star that erratically and explosively brightens and dims






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






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






27. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






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






29. The family of radiant energy that includes light as a subset






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






31. 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.






32. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






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






34. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






35. When the Sun is farthest south of the celestial equator (About December 22)






36. When the Sun moves from south to north across the celestial equator (about March 21)






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






38. The Greek philosopher responsible for making the stellar magnitude scale.






39. 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






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






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






42. A word meaning 'the same in all directions.'






43. When the Moon entirely blocks the Sun.






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






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






46. When the Moon entirely blocks the Sun.






47. A star that blows itself apart






48. The location in the Milky Way where stars orbit like a solid wheel






49. Centered on the Earth






50. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)