Science 8 1st Quarter Reviewer
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31 Terms
Sound
Produced when matter vibrates. These vibrations travel outwards from the source.
medium
air, water, solids
day
sound travels slower
longitudinal waves
Sounds is propagated through
night
sound travels faster
Acoustic
Is the study of the propagation, absorption and reflection of sound waves
Solids
the molecules are close together forming lattices bound by strong intermolecular forces of attraction
Propagation of sound through liquid
sound travels slower in homogeneous liquids than in solid but faster than in gases
outer ear
composed of pinna (cartilage and soft tissue on the side of your head) and ear canal
Pinna
the sounds hit the ___ and goes into the ear canal
this helps determine the direction where the sound comes from
middle ear
starts with the eardrum at the end of the ear canal.
Ossicle
three tiny bones of middle ear
inner ear
helps you hear and balance
cochlea
hearing part
semicircular canals, utricle, and saccule
helps you balance
cochlea
bone that looks like a snail
auditory nerve
signals go through the __ in your brain that interprets the electrical signals as sound
Light
behaves like a particle and a wave
Electromagnetic Theory of Light
Proposed by James Clark Maxwell
James Clark Maxwell
he showed that electric and magnetic fields were propagated together and that their speed with the speed of light
Electromagnetic Waves
transverse waves produces by the motion of electrically charged particles (photons) carrying energy and moving in the speed of light
Electromagnetic waves
does not a medium to travel so they can travel through a vacuum with a speed of 300,000km/sec
Vacuum
space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any process being carried in there
Radiowaves
Lowest Energy
Gamma Rays
Highest Energy
Infrared Radiation
is longer than red and is visible to the human eye but you can feel it as heat
Prism
passing through a ___ is separated into different colors
Sun Surface Temperature
5,500°C
Betelgeuse Surface Temperature
3,000°C
Rigel Surface Temperature
12,000°C
Isaac Newton
showed in his experiments that a prism bends visible light