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8 TH GRADE SCIENCE

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  1. 8TH GRADE SCIENCE WAVES TEST 10 PS 7.8.4 -7.8.12

  2. A DISTURBANCE THAT MOVES THROUGH MATTER OR SPACE. • LIQUID B. GAS C. WAVE D. MATTER • 2. WAVES CALLED ____ WAVES CAN TRAVEL EITHER THROUGH MATTER OR THROUGH EMPTY SPACE. • MECHANICAL B. ELECTROMAGNETIC • C. TRANSVERSE D. COMPRESSIONAL • 3.____ CARRY ENERGY FROM ONE PLACE TO ANOTHER. • A. WAVES B.FREQUENCY C. CREST

  3. 4. A ______ WAVE CAUSES PARTICLES IN MATTER TO MOVE BACK AND FORTH AT RIGHT ANGLES TO THE DIRECTION IN WHICH THE WAVE TRAVELS. • X RAY B. CREST C. TROUGH • D. TRANSVERSE • 5. SOME WAVES KNOWN AS ____ WAVES, CAN TRAVEL ONLY THROUGH MATTER. • X RAYS B. MECHANICAL • C. FREQUENCY D. ELECTROMAGNETIC • 6. ELECTROMAGNETIC WAVES ARE _____ WAVES. • COMPRESSIONAL B. MECHANICAL • C. SEISMIC D. TRANSVERSE

  4. 7. ______ WAVES MOVE THROUGH THE GROUND DURING AN EARTHQUAKE • RAREFACTION B. ELECTROMAGNETIC • C. SEISMIC D. X RAYS • 8. THE HIGH POINT OF A WAVE. • TROUGH B. MAX C. DOWN D. CREST • 9. THE LOW POINT OF A WAVE. • TROUGH B. MAX C. DOWN D. CREST • 10. LIGHT, RADIOWAVES, AND ___ ARE EXAMPLES OF ELECTROMAGNETIC WAVES. • A. X RAYS B. SEISMIC C. CREST D. MECHANICAL

  5. 11. THE DISTANCE FROM WAVE CREST TO WAVE CREST OR TROUGH TO TROUGH IS CALLED THE ________. • WAVELENGTH B. WAVEHEIGHT • C. AMPLITUDE D. INTENSITY • 12. THE SERIES OF COMPRESSIONS AND ________ FORMS A COMPRESSIONAL WAVE. • TRANSVERSE B. RAREFACTION • C. FREQUENCY D. CREST

  6. 13. A _____ WAVE CAUSES PARTICLES IN MATTER TO MOVE BACK AND FORTH ALONG THE SAME DIRECTION IN WHICH THE WAVE TRAVELS. • COMPRESSIONAL B. ELECTROMAGNETIC • C. SEISMIC D. FREQUENCY • 14. THE _______ OF A WAVE IS THE NUMBER OF WAVELENGTHS THAT PASS BY A POINT EACH SECOND. • RAREFACTION B. FREQUENCY • C. COMPRESSION D. MECHANICS

  7. 15. THE ____ OF A TRANVERSE WAVE IS HALF THE DISTANCE BETWEEN A CREST AND TROUGH. • WAVELENGTH B. WAVEHEIGHT • C. FREQUENCY D. AMPLITUDE • 16. ______ WAVES ARE PRODUCED BY VIBRATIONS IN EARTH’S CRUST THAT CAUSES EARTHQUAKES. • HERTZ B. SEISMIC C. X RAY D. AMP • 17. THE SI UNIT FOR FREQUENCY IS THE ____, ABBREVIATED Hz • A. HERTZ B. HANZ C. HARTZ D. HETZ

  8. 18. THE MORE ENERGY A WAVE CARRIES, THE LARGER IT’S ______. • HERTZ B. REFRACTION • C. AMPLITUDE D. DIFFRACTION • 19. ONE HERTZ = 1 VIBRATION PER SECOND, OR ONE _____ PASSING A POINT IN ONE SECOND. • WAVELENGTH B. REFRACTION • C. DIFFRACTION D. COMPRESSION • 20. WAVES CARRY ___, NOT MATTER. • A. ENERGY B. OHMS C. AMPS D. HERTZ

  9. 21. WHEN A LIGHT WAVE MOVES FROM AIR TO WATER IT_____. • SPEEDS UP B. SLOWS DOWN • C. STAYS THE SAME D. STOPS • 22. _____ IS THE CHANGE IN DIRECTION OF A WAVE WHEN IT CHANGES SPEED. • CONTRACTION B. CONVECTION • C. COMPRESSION D. REFRACTION • 23. WAVES CAN CHANGE DIRECTION BY ____, WHICH IS THE BENDING OF WAVES AROUND AN OBJECT. • A. DIFFRACTION B. COMPRESSION

  10. 24. SOUND WAVES ARE _____ WAVES. • DIFFRACTION B. COMPRESSIONAL • C. AMPLITUDAL D. REFRACTION • 25. SOUND WAVES CAN ONLY TRAVEL THROUGH _______. • WATER B. GAS C. MATTER D. EARTH • 26. THE ____ OF SOUND DEPENDS ON THE MATTER THROUGH WHICH IT TRAVELS. • A. LENGTH B. SPEED C. VOLUME D. PITCH

  11. 27. LOUD SOUNDS HAVE MORE _____ THAN SOFT SOUNDS. • SPEED B. INTENSITY C. MATTER • 28. THE AMOUNT OF ENERGY THAT A WAVE CARRIES PAST A CERTAIN AREA EACH SECOND IS THE _______ OF THE SOUND. • MATTER B. AMPLITUDE • C. SEISMIC D. INTENSITY • 29. THE INTENSITY OF SOUND WAVES IS MEASURED IN UNITS OF _______. • DECIBLES B. HERTZ C. ENERGY • D. SPEED

  12. 30. THE SOFTEST SOUND A PERSON CAN HEAR HAS AN INTENSITY OF __ db. • 10 B. 20 C. 0 D. 120 • 31. SOUND WITH INTENSITIES OF ABOUT ____ db OR HIGHER ARE PAINFUL TO PEOPLE. • 10 B. 20 C. 90 D. 120 • 32. ______ IS THE HUMAN PERCEPTION OF THE FREQUENCY OF SOUND. • ECHOES B. PITCH • C. REFLECTION D. REFRACTION

  13. 33. THE EAR CAN BE DIVIDED INTO 3 PARTS, THE OUTER EAR, THE ____ EAR, • AND THE INNER EAR. • UNDER B. MIDDLE C. EXO D. INDO • 34. ____ ARE SOUNDS THAT REFLECT OFF SURFACES. • SOLIDS B. PITCH • C. SPECTRUM D. ECHOES • 35. REPEATED ____ ARE CALLED REVERBERATION. • A. SOLIDS B.PITCH C. SPECTRUM D. ECHOES

  14. 36. THE REFLECTION OF _____ CAN BE USED TO LOCATE OR IDENTIFY OBJECTS. • HERTZ B. SOUND • C. SOLIDS D. WAVELENGTH • 37. _______ IS THE PROCESS OF LOCATING OBJECTS BY BOUNCING SOUNDS OFF THEM. • ECHOLOCATION B. PITCH • C. REFRACTION D. MAGNETISM

  15. 38. EVERY SOUND YOU HERE IS CAUSED BY SOMETHING THAT IS________. • LIT UP B. ECHOLOCATED • C. INTENSIFIED D. VIBRATING • 39. SOUND WAVES TRAVEL THROUGH ______ FASTER THAN THEY DO THROUGH WATER • A. SOLIDS B. PLASMA C. GAS D. PITCH • 40. EACH INCREASE OF 10 db OF INTENSITY • MULTIPLIES THE ENERGY OF A SOUND WAVE BY ___ db. • A. 1 B. 10 C. 100 D. 1000

  16. 41. YOU CAN SEE LIGHT FROM THE MOON, DISTANT STARS, AND GALAXIES BECAUSE LIGHT IS AN ______ WAVE. • REVERBERATION B. PITCH • C. ELECTROKINETIC D. ELECTROMAGNETIC • 42. IN EMPTY SPACE, LIGHT TRAVELS AT A SPEED OF _______ Km PER SECOND. • 100,000 B. 500,000 C. 300,000 • 43. LIGHT EMITTED FROM THE SUN TRAVELS 150,000 Km TO EARTH IN ONLY ABOUT ____ MINUTES. • A. 8.5 B. 20.5 C. 1.5 D. 60.5

  17. 44. LIGHT TRAVELS FASTEST IN EMPTY SPACE AND SLOWEST IN _______. • GALAXIES B. BLACK HOLES • C. SOLAR SYSTEMS D. SOLIDS • 45. WAVELENGTHS OF LIGHT ARE USUALLY EXPRESSED IN UNITS OF ______. • NANOMETERS B. LIGHTOMETERS • C. BRIGHTOMETERS D. FLASHOMETERS • 46. LIGHT WAVES, AND ALL ELECTROMAGNETIC WAVES, ARE ____ WAVES • A. TRANSVERSE B. REVERSE C. COMPRESS

  18. 47. ONE NANOMETER IS EQUAL TO ____ OF A METER. • 1 BILLIONTH B. 1 MILLIONTH • C. 1 TRILLIONTH D. 1 BILLION • 48. GREEN LIGHT HAS A WAVELENGTH OF ABOUT 500 NANOMETERS, OR ___ BILLIONTHS OF A METER. • 100 B. 200 C. 400 D. 500 • 49. A DIM LIGHT HAS LOWER INTENSITY BECAUSE THE WAVES CARRY ___ ENERGY. • A. MORE B. KINETIC C. LESS D. LIGHT

  19. 50. THE ______ SPECTRUM IS THE COMPLETE RANGE OF ELECTROMAGNETIC WAVE FREQUENCIES AND WAVELENGTHS. • A.ELECTROGENETIC B. ELECTROKINETIC • C. ELECTROMAGNETO D. ELECTROMAGNETIC • 51. AT ONE END OF THE SPECTRUM, THE WAVES HAVE LOW ____ , LONG WAVELENGTH, AND LOW ENERGY. • ELECTRICITY B. FREQUENCY • C.BACTERIA D. NANOMETERS

  20. 52. ALL WARM BODIES EMIT ____ WAVES. • ULRAVIOLET B. X RAY • C. GAMMA D. INFRARED • 53. THE RANGE OF ELECTROMAGNETIC WAVES BETWEEN ____ BILLIONTHS AND 400 BILLIONTHS OF A METER IS THE RANGE OF WAVELENGTHS PEOPLE CAN SEE. • A. 700 B. 1000 C. 100 D. 300

  21. 54. ELECTROMAGNETIC WAVES WITH WAVELENGTHS BETWEEN 400 BILLIONTHS AND 10 BILLIONTHS OF A METER ARE ____ RAYS. • GAMMA B. X • C. INFRARED D. ULTRAVIOLET • 55. THE ELECTOMAGNETIC WAVES WITH THE HIGHEST ENERGY, HIGHEST FREQUENCY, AND SHORTEST WAVELENGTHS ARE THE ___ RAYS AND GAMMA RAYS. • A. X B. INFRARED C. ULTRAVIOLET

  22. 56. SUNLIGHT THAT REACHES THE EARTH CONTAINS A SMALL FRACTION OF _____ WAVES. • ULTRAVIOLET B. LIGHT • C. HEAT D. ULTRARADIAL • 57. THE FOOD INDUSTRY USES ____ RAYS TO KILL BACTERIA THAT MIGHT INCREASE THE RATE OF SPOILAGE OF FOOD. • A. X B. ULTRAVIOLET C. FOOD D. GAMMA

  23. 58. MOST OF THE ENERGY FROM THE ____ IS IN THE FORM OF ULTRAVIOLET, VISIBLE, AND INFRARED RAYS. • MOON B. EARTH C. MARS D. SUN • 59.MOST OF THE ULTRAVIOLET RAYS FROM THE SUN ARE BLOCKED BY THE EARTH’S ________. • IONOSPHERE B. ATMOSPHERE • C. HEMISPHERE D. LITHOSPHERE • 60. THE SUN IS A ______. • PLANET B. COMET • C. MOON D. STAR

  24. ANSWERS • C-WAVE • 2. B-ELECTROMAGNETIC • 3. A-WAVES • 4. D-TRANSVERSE • 5. B-MECHANICAL • 6. D-TRANSVERSE • 7. C-SEISMIC • 8. D-CREST • 9. A-TROUGH • 10. A-XRAYS

  25. 11. A-WAVELENGTH 12. B-RAREFACTION 13. A-COMPRESSIONAL 14. B-FREQUENCY 15. D-AMPLITUDE 16. B-SEISMIC 17. A-HERTZ 18. C-AMPLITUDE 19. A-WAVELENGTH 20. A-ENERGY

  26. 21. B-SLOWS DOWN 22. D-REFRACTION 23. A-DIFFRACTION 24. B-COMPRESSIONAL 25. C-MATTER 26. B-SPEED 27. B-INTENSITY 28. D-INTENSITY 29. A-DECIBLES 30. C-0

  27. 31. D-120 32. B-PITCH 33. B-MIDDLE 34. D-ECHOES 35. D-ECHOES 36. B-SOUND 37. A-ECHOLOCATION 38. D-VIBRATING 39. A-SOLIDS 40. B-10

  28. 41. D-ELECTROMAGNETIC 42. C-300,000 43. A-8.5 44. D-SOLIDS 45. A-NANOMETERS 46. A-TRANSVERSE 47. A-BILLIONTH 48. D-500 49. C-LESS 50. D-ELECTROMAGNETIC

  29. 51. B-FREQUENCY 52. D-INFRARED 53. A-700 54. D-ULTRAVIOLET 55. A-X 56. A-ULTRAVIOLET 57. D-GAMMA 58. D-SUN 59. B-ATMOSPHERE 60. D-STAR