energy study cards
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| renewable | something that is not dissipated or depleted by use over and over
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| crest | highest point in a wave
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| trough | lowest point in a wave
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| non renewable | something that is dissipated or depleted by one use
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| medium | the intervening substance through which impressions are conveyed to the senses or a force acts on objects at a distance
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| vacuum | a space completely devoid of matter
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| forms of energy (7) | -chemical
-electrical
-light
-mechanical
-solar
-sound
-thermal
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| energy states (2) | -potential
-kinetic
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| electromagnetic waves | radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
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| mechanical waves | A mechanical wave is a wave that propagates as an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited
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| work calculations | force x distance
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| vibration | a repeated back and forth up and down motion
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| newton | a measurement of force and weight.
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| speed calculations | distance x time
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| wavelength | the distance between successive crests of a wave
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| amplitude | height of a crest from the rest position.
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| newton meters | the force of one newton and distance.
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| energy transfer conversions | kg and meters to joules
weight distance and time to watts
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| four factors of friction | mass, texture, density, and weight
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| reduction | the action or fact of making a specified thing smaller or less in amount, degree, or size
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| pitch | the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone
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| law of conservation of energy | energy is not created or destroyed only conserved
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| energy in a closed system | is reused and keeps going around and around
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| energy in an open system | is let free to appear to be dissipated
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| System boundaries | A system boundary is an optional visual aid in the diagram; it does not add semantic value to the model.
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| wave | a disturbance that transfers energy from place to place.
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| transverse waves | a wave vibrating at right angles to the direction of its propagation
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| longitudinal waves | a wave vibrating in the direction of propagation
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| a closed system _______________ | keeps the energy reproducing and converted
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| Why does it appear that energy has been lost or disappears in an open system? | Because the energy isn't reused, but instead released into the air, and energy is very difficult if not impossible to capture.
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| Human body Open / Closed Explanation: | closed, because we are born, we eat, we decompose food, that food goes into the ground, that food grows more food, we eat it, etc.
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| Mental Boundary /Physical Boundary / Both Explanation | physical, because there is only a certain extent your body can go to.
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| Earth’s Atmosphere Open / Closed Explanation: | closed, because out atmosphere traps heat in. Heat is energy.
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| Mental Boundary /Physical Boundary / Both | this would be a physical but unseeable boundary.
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| Ecosystem Open / Closed Explanation: | closed, because we are born, we eat, we decompose food, that food goes into the ground, that food grows more food, we eat it, WE decompose and also help food grow.
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| Mental Boundary /Physical Boundary / Both Explanation: | physical, we are seen decomposing in real life, not in our heads.
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| How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m to the side of the road? | 3150Nx75.5M=237825J
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| When you drop a penny in a water fountain, explain the vibrations of the water particles as the energy travels through them | the vibrations are high pitched and quiet.
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| How does a wave move? (Hint: Describe the direction and movement of particles.) | the waves of energy move in a certain direction as they move up and down.
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| label the parts of a transverse wave. Describe the motion of the energy as it passes through the medium. | Highest part:crest
lowest part:trough
space between crest and resting point: amplitude
the motion of energy becomes less as the medium resists the energy.
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| Give an example of a medium that mechanical waves travel through. | water
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| A tuning fork has a frequency of 310Hz. The wavelength of the sound produced by the tuning fork is 1.32m. Calculate the velocity of the wave | 310x1.32=409.2λ
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| How does the state of matter affect a wave’s length and/or speed? (solid, liquid, gas) | the matter resists the energy of the wave, making the length and/or speed less.
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