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. An object that may remain after a star explodes






2. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






3. The mass of an object divided by its volume






4. Large nebula consisting of very cold gas and dust






5. Jupiter






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






7. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






8. A bright area of higher temperature that often proceeds the formation of sunspots.






9. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






10. 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.






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






12. A very dense - highly populated cluster of galaxies






13. Venus (retrograde)






14. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






15. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






16. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






17. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






18. A term referring to Jupiter-like planets






19. 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






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






21. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






22. The process that powers the sun and hydrogen bombs






23. Jupiter






24. VENUS






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






26. The average distance between the Earth and the Sun (=1.5 x10^8km)






27. All wavelengths of light emitted by a blackbody.






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






29. VENUS






30. 1μm 100 nm






31. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






32. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






33. The law that describes the blackbody curve - and let to quantum mechanics.

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34. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






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






36. What Ole Roemer used to measure the speed of light in a vacuum






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






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






39. Infinitely long -> 10 cm






40. Light scattered through the atmosphere that degrades astronomical images






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






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






43. The rock that makes up the lunar maria






44. The law that predicts the possible types of spectra.

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45. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






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






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






48. A push or a pull






49. Neptune or uranus






50. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.