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. Mercury and venus






2. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






3. The mix of pure photon energy that emerged at the start of the universe.






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






5. The rotation of a star or planet at different speeds at its equator and poles






6. 10^2 nm 10^7 nm






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






8. The area behind a lens where images are resolved






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






10. Approximate speed of light in a vacuum






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






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






13. A fusion process in which protons build together to form helium






14. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






15. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






16. Jupiter






17. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






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






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






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






22. A star without enough mass to begin hydrogen fusion






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






24. Large nebula consisting of very cold gas and dust






25. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






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






27. Electromagnetic Radiation






28. A plot of star absolute magnitude verses spectral type.






29. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






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






32. Orbit in Jupiters orbit






33. Venus






34. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






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






36. A very dense - highly populated cluster of galaxies






37. The distance between a lens and its focal plane






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






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






40. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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41. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






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






43. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






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






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






46. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






48. The mass of an object divided by its volume






49. An evolved star - past the helium flash that is burning helium to carbon in it's cores






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