SCIENCE UNIT 3

scientist decided that heat was a form of energy not a substance

the measure of the total kinetic energy

the measure of the total kinetic energy in all the particles of the substance

nerve endings on your skin can detect temp. change

heat giving off colour

most reliable tools to tell temp.

a material that is affected by change

providing info. about temp

indicates data with pointer

2 wires twisted together. can operate with by switch

a recording thermometer

used to determine the efficiency of the home

all substances r made of particles, always in motion, space between

energy is motion, a change in motion is the temp of substance

energy cant be created or destroyed, can be transformed or passed

keep shape and size, cant be compressed

no shape or size, can be compressed

shape of container, almost incompressible

gases heated, av. energy increase, when cooled, decreases

nrg required to raise the entire substance 1

nrg required to raise 1g of a substance 1

when a statu or phase occurs there is always a transfer of nrg, will be either absorbed or released during a place of change

are specific points where substances melt or boil

particles are given nrg to a point where they want to escape

is the transfer of energy

waves of radiant nrg travels in vaccum, travel acroos empty space @ high speed, travel in lines,like waves,absorb/reflected,interact w/matr

objects absorb rediant energy when r cooled and emit radiant energy when hot

objects or surface, dont absorb radiant nrg, dont emit radiant nrg readily

detected, measured and controlled

in solids the particles are closly packed together, thermal nrg can be transformed from 1 partilce to another

hot/cold packs safety lamps, radiatior, diamonds

energy isnt lost, only changed, particles allow transfer of energy to take place

this is where the energy comes to be transferred

energy is always transferred away from concentrated sources

energy can change its form when transferred

almost all the energy is transferred directly from particle to particle, some energy is lost to surrondings

a control device can start and stop the transfer of energy

chem. energy can be transferred into thermal energy when wood or coal is burned impact. polution by brun of fossil fuels

produced in many ways, hydro-electrical dams use the force of gravity wrk pulls the water over the dam to turn turbines impacts, pollution

push or pulls objects, release therm. nrg. empacts, overheating can cause breakdowns, dangerous situation for machine

volcanoes are sources of geotherm nrg, from interior of earth, can make hot water,piped into lines and make nrg,impacts,extensive use of nrg

radiant energy from the sun, impact, some devices may have aesthetics where they r located

energy of moving air, is the result of solar energy and convection. windmills provide electricity. impacts, aesthetics

living organisms burn chem. energy to generate energy. impacts, waste management

energy source that can provide energy in a useful form. are from chemicals from fossils imapcts. global warming climate change. plant growth

1.energy sources are non-renewable and supplies are running out. provide toxic chem, which can harm the environment

burning ourselves, forest fires, burning houses, storage of fossil fuels could start fire,and create smog

released from burning fossil fuels, traps heat energy into atmosphere and creates global warming

released when coal and natural gases are burned this gas is irritant to eyes, nose and throats

is produced when fires burn without with out enough oxygen.its colorless, odorless, and lethal it hinders brain reasoning and can kill u