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 perfect absorber and radiator of electromagnetic radiation.






2. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






3. A star that blows itself apart






4. Matter that reveals itself only through its gravitational attraction.






5. A small round distribution of gas surrounding a dying star






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






7. A measure of the force of gravity on an object






8. The number of protons in an atom.






9. A method of finding a star's distance from its absolute magnitude and spectral type or color.






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






11. Jupiter






12. The location around an atom where an electron resides.






13. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






14. 10^2 nm 10^7 nm






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






16. What do we think the actual fate of the universe will be and why do we think this?






17. 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.






18. 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.






19. Mercury






20. A spectrum of light with energy at only a few wavelengths.






21. The mirror that gathers the light in a reflector






22. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






23. Matter that reveals itself only through its gravitational attraction.






24. The rock that makes up the lunar highlands






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






26. Half of the longest diameter across an ellipse






27. The slow wobble of the Earth on its rotation axis.






28. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






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






30. The area behind a lens where images are resolved






31. Small moons that maintain the shape of rings around Saturn and Uranus






32. Venus






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






34. The source of the force that is accelerating the expansion rate of the universe.






35. The mass of an object divided by its volume






36. A continuous spectrum of light missing energy at a few wave lengths.






37. Orbit in Jupiters orbit






38. The rock that makes up the lunar highlands






39. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






40. A spread of light with an uninterrupted wavelength distribution of energy.






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






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






43. The location around an atom where an electron resides.






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






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






46. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






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






48. An energetic event taking place in the early universe






49. A very dense - highly populated cluster of galaxies






50. Mercury and venus