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waves
states of matter
energy
sound
waves
100
a disturbance that transfers energy from one place to another without requiring matter to move the entire distance
What is a wave?
100
a substance that cannot be broken down into a simpler substance by ordinary chemical changes
What is an element?
100
the ability to do work or cause a change
What is energy?
100
a space containing few or no particles
What is a vacuum?
100
the bouncing back of a wave after it strikes a barrier
What is reflection?
200
a substance through which a wave moves
What is a medium?
200
a substance made up of two or more different types of atoms bonded together
What is a compound?
200
a measurement of usable energy after an energy conversion; the ratio of usable energy to the total energy after energy conservation
What is energy efficiency?
200
the quality of highness or lowness of a sound
What is pitch?
200
the bending of a wave as it crosses the boundary between two mediums at an angle other than 90 degrees
What is refraction?
300
a type of wave in which the disturbance moves at right angles or perpendicular, to the direction in which the wave travels
What is a transverse wave?
300
a combination of two or more substances that do not combine chemically but remain the same individual substance
What is a mixture?
300
a type of technology in which light-sensitive materials convert sunlight into electrical energy
What is solar cells?
300
sound waves with frequencies above 20,000 hertz, the upper limit of typical hearing levels in humans, used for medical purposes, among other things
What is ultrasound?
300
the meeting and combining of waves; the adding or subtracting of wave amplitudes that occurs as waves overlap
What is interference?
400
the distance from one wave peak or crest to the next peak or crest
What is wavelength?
400
a characteristic of a substance that can be observed without changing the identity of the substance
What is a physical property?
400
a law stating that no matter how energy is transferred or transformed, it continues to exist in one form or another
What is law of conservation of energy?
400
the strengthening of a sound wave when it combines with an object's natural vibration
What is resonance?
400
a wave, such as a sound wave or a seismic wave, that transfers kinetic energy through matter
What is a mechanical wave?
500
the spreading out of waves as they pass through an opening or around the edges of an obstacle
What is diffraction?
500
a characteristic of a substance that describes how it can for a new substance
What is a chemical property?
500
the energy of motion
What is kinetic energy?
500
a change in the observed frequency of a wave, occurring when the source of the wave or the observer is moving
What is Doppler effect?
500
the number of waves that pass a fixed point in a given amount of time, usually one second; the number of cycles per unit time
What is frequency?