SCIENCE 13,15,&16

• Negative ellectrode is connected to the positive battery terminal
• Positive ellectrode is connected to the negative battery terminal
• copper chloride can be seperated by electrolysis making pure copper and chlorine gas
• what color is chlorine gas?

  green
• what happend when you put a metal strip into a dillute acid?

  it produced hydrogen gas
• how to test for hydrogen gas?

  put a burnt splint into the tube filled with gas and if it makes a pop sound, then its hydrogen gas
• the place around us is called..?

  medium
• sound is produced because..?

  there is a vibration of molecule
• region where the vibrating particles are the closest together is called?

  compression
• region where the vibrating particles are the furtherest apart is called?

  rarefraction
• how fast can the matter vibrate?

  solid-6,000 m/s

  liquid-1.500 m/s

  gas-350 m/s
• how to find distance?

  D=SxT
• Vacuum is a place where there is no matter, therfore there is no sound produced
• on rough surface, soundwave..?

  Refracted (absorb)
• on smooth surface, sound wave..?

  reflected (echo)
• the outer ear is called..?

  pinna
• after ear canal, you can find the..?

  ear drum
• the 3 smallest bone is called?

  ossicles
• name the ossicles

  1. malleus (hammer)
  2. incus (anvil)
  3. stapes (stirrup)
• the snail like thing inside our inner ear is called?

  cochlea
• whats the function of the cochlea?

  to convert sound into electrical signal and send it to the ear nerve to be send to the brain
• what does CRO stand for?

  cathode ray oscilloscope
• small things makes..?

  higher pitch
• big things makes..?

  lower pitch