Science- Unit 3

stephanieyw's version from 2018-01-17 02:27

Section 1

Question Answer
Mechanical Potential EnergyEnergy that comes from position and condition; gives it the ability to fall+ includes 2 types- stored (muscles, food, sun) and position (object on ground, ready to move)
Mechanical Kinetic EnergyEnergy that comes from motion/velocity; dependent on speed and mass ( moving objects )
Radiant EnergyElectromagnetic energy that travels in transverse waves; includes visible light + solar energy--relates to the Electromagnetic spectrum
Chemical EnergyEnergy stored in the bonds of atoms + molecules; holds and breaks particles apart--biomass, petroleum, natural gas, propane
Electrical Energythe movement of electrical charges; applying a force can move some electrons; charges move through a wire (electricity)--lightening
Nuclear EnergyEnergy that is stored in the nucleus of an atom- the energy that holds the nucleus together- can release energy when combined or split
Thermal EnergyHEAT; internal energy in substances; vibration/movement of atoms + molecules within substances--geothermal energy
Sound Energyproduced when a force causes an object/ substance to vibrate; movement of energy through substances in longitudinal waves
Radiationheat transfer through waves; does not require a medium to travel through

Section 2

Question Answer
Electromagnetic Spectrumthe range of wavelengths of frequencies over which electromagnetic radiation extends
gamma rayshigh frequencies, high energy + short wave lengths- used in medical; produced by sun, stars radioactive material
x-rayshigh frequency; absorbed in dense matter, produced by sun and stars
ultravioletcarries more energy than x-rays- can damage skin used to sterilize medical equipment
visiblewavelengths visible to most human eyes; causes the sensation of light-- fireflies, light bulbs, stars
infraredassociated with heat emited thermal infrared shorter ones are not hot (invisible to the human eye)
microwavefor cell phones and radar- receives reflection then converts to visual
radiolongest wave length; frequencies are easier to travel through materials

Section 3

Question Answer
HeatA form of energy associated with movement of atoms/ molecules in any material
Temperaturea measure of the average kinetic energy
Energy Transerthe passing of energy from one object to another-- jumping on a trampoline
Energy Transformationany change of energy from one form to another; energy is neither lost nor gained; occurs everywhere
Differential Heatingdifferent materials heat and cool at different rates; darker colors absorbs more energy-- think of water, soil, sand lab
Conductionthe process by which heat/ electricity is directly transmitted through a substance when there is a difference of temp. ( particle to particle )
Convectionthe transfer of heat through fluids (gases + liquids) affected by density of liquad

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