Science Week 4 Lesson

oil, coal, and natural gas buried inside Earth millions of years ago

Humans use them for fuel

Comes from decomposing plants and animals under pressure and heat

not renewable

Temperature = measures heat energy (how fast molecules are moving)

Heat = the amount of heat energy are in an object

Heat moves from hot to cold

When you feel cold, heat is leaving your body and into the environment

Conduction= when heat energy "rubs off" on another object.

Conductors (metal) can hold and transfer heat very well

Convection = when heat moves in air

hot air rises, cool air sinks

Radiation = when something gives off heat

hot molecules move faster will expand to take up more room

cool molecules move slower will contract and get smaller

*water is one exception

buildings and bridges have expansion gaps

prevent breaking

Daniel Fahrenheit invented thermometers

Anders Celsius an astronomer who invented the temperature scale (0 is freezing and 100 is boiling)

Lord Kelvin invented absolute zero

Heat energy is measured in Btu

Energy is measured in joules

Joules = amount of energy it takes to life a one-pound object 9 inches.

1000 J = 1 Btu