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. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






2. All wavelengths of light emitted by a blackbody.






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






4. The law that syas light energy from a blackbody increases as (temperature^4)






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






6. What causes the zones and belts on jupiter and saturn?






7. The material from which the solar system formed






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






9. A small and dim but hot star.






10. Jupiter






11. The number of protons in an atom.






12. The rock that makes up the lunar maria






13. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






14. A small chunk of rock in space






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






16. The apparent path of the Sun through the stars on the celestial sphere.






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






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






19. 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)






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






21. The amount an image is enlarged by a telescope






22. A large and bright but cool star.






23. Ganymede






24. The act of removing an electron from an atom.






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






26. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






27. The distance between a lens and its focal plane






28. 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.






29. 10 nm 10^2 nm






30. The fusion process that turns three helium nuclei into a carbon nucleus






31. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






32. The organization of clusters of galaxies into sheets and strings






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






34. 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)






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






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






37. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






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






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






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






41. The temp at which a substance in the vacuum of space solidifies






42. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






43. An energetic event taking place in the early universe






44. A planet that is farther from the sun than the Earth is






45. A particle of light.






46. The first rock-sized bodies that formed in the solar nebula from dust grains






47. A telescope that uses mirrors to focus light






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






49. A word meaning 'the same everywhere throughout.'






50. A logarithmically scaled value for the measured brightness of a star.