Energy
What is energy
What is sound energy
what is light energy
travels as waves and can move through empty space
what is thermal energy
energy due to randomly moving particles that make up matter
what is pitch
how high or low a sound is
What is kinetic energy
energy of motion
what is the difference between pitch and volume
volume- a measure of how strong a sound seems to us
pitch- how high or low a sound is
when visible light is combined what color is it
white
what are the 3 forms thermal energy
conduction, convection, radiation
what is electrical energy
energy caused by the movement of electrically charged particles
What is potential energy
what kinds of matter does sound move through
solids, liquids, gasses
how do plants use light energy
they use sun as food to grow and reproduce (photosynthesis)
give 3 examples of thermal energy
cooking, heat, fire
what is the difference between kinetic and potential energy
potential energy is stored and kinetic energy is energy in motion
Give an example of something that has potential energy and then turns into kinetic energy. The give an example of something that has kinetic energy and turns into potential energy.
answers will vary
how does sound occur
vibrating objects
what 3 things can happen when light strikes an object
light can pass through the object, be absorbed by it, or reflect off it
what is the difference between conduction and convection
conduction is the transfer of heat that occurs when one thing touches another. convection is the transfer of thermal energy as matter moves
explain wavelength, frequency, and amplitude
wavelength-the distance between a point on one wave and a similar point on the next wave
frequency- the number of waves that pass a point in a certain amount of time
amplitude- the height of a wave measured from its midline
Explain what form of energy occurs when you throw a ball into the air and what form if energy occurs as it comes back down
as it rises the kinetic energy turns into potential energy, at the top of the throw the ball has maximum potential energy, as it falls the potential energy turns back into kinetic energy
how can you tell high frequency from low frequency
high frequency has more wavelength cycles, low frequency has less wavelength cycles
how are the color red and violet different in light waves
red has longer wavelengths and low frequency, violet had shorter wavelengths and high frequency
explain how the sun heats the earth
energy is sent out in waves, waves can move through empty space. those waves come down into earth and heat the matter around us
explain refraction, reflection, and absorption
refraction- when light bends
reflection- when light rays bounce off, or reflect from a surface
absorption- occurs when an object takes in a light wave