Warm up

1. Are fossil fuels renewable or nonrenewable? Why?

2. Where do fossil fuels get their energy from?

3. What are some examples of fossil fuels?

Heat/Temperature

Temperature:

Measure of the AVERAGE KINETIC ENERGY of the particles

Depends upon KINETIC energy

How do we measure temperature?

3 Scales:FahrenheitCelsiusKelvin

What is absolute zero?

Thermal energy:

TOTAL energy of the PARTICLES in an object

TE

depends on TEMPERATURE AND AMOUNT of particles

SO…

Which has a higher temperature?

Which has more TE?

Why?

Explain the energy transfer shown below:

Transfer of THERMAL energy

TE always moves from higher-temperature to lower-temperature

Heating stops when the objects are the same temperature

Conduction

Transfer of TE when objects are touching

Radiation

Transfer of TE through matter or space as EM waves (ex: visible light, infrared, etc)

Where can we see examples of this?

Convection

Transfer of thermal energy by the movement of liquid or gas

How exactly does this work?

Where can we see examples of this?

Problems: Use your textbook, page 153, to answer

the following:

1. 24oC to _____ oF 2. 17oC to _____ oF 3. -4 oF to _____ oC 4. 98.6 oF to _____ oC