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 energetic event taking place in the early universe






2. The sinking of denser elements to the center of a young molten planet






3. The gap etween saturn's A and B rings






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






5. Mercury and venus






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






7. The place in the sky that the Earth's axis points toward (can be either north or south)






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






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






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






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






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






13. The study of the universe as a whole.






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






15. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






16. 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)






17. Mercury






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






19. 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






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

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






22. A particle of light.






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






24. 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.






25. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






26. 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






27. Venus






28. Europa






29. Jupiter






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






31. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






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

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34. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






35. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






36. 1μm 100 nm






37. The force of attraction between any two objects having mass






38. Any class of objects with a uniform luminosity used to determine distance.






39. A quantity measuring the stability of the Earth's atmosphere






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






41. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






42. The displacement of spectral lines to redder colors caused by the expansion of the universe.






43. Centered on the Earth






44. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






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






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






48. A crystalline patter found in iron meteorites






49. A massive variable star used to find distances to the galaxies or clusters that contain them.






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