Lesson 11: Stored Energy

Objectives:1. Energy can be stored in food, fuels and electrical cells2. Describe how electricity transfers energy

Sort the cards at your table into the ones that store energy and the ones that don’t.

Where does all of our energy come from?Look on page 96 & 97 in the green science 14 textbookSummarize in your own words how the world gets it’s energy from the sun.

10.3 Energy from the SunAnimals, such as humans, need to eat to live, grow and reproduce ...

... and we eat things that grow as a result of sunshine ...

... giving us this food chain.

light energy(from the sun)

chemical (stored) energy

(in the plant)

chemical (stored) energy

(inside the animal)

• Plants have their own energy chain……

This is an energy transfer diagram.

It shows where energy is transferred to and from, and what causes the transfer. Here, the plant transfers energy from light into energy in chemicals it can use

10.1b Electrical energyElectrical energy comes from ...

chemical energy in thefossil fuels used inpower stations

kinetic energy indynamos

light energy insolar cells

chemical energy storedin batteries

10.1b Electrical energyElectrical energy can change to ...

light energysound energy

heat energy kinetic (movement) energy

10.1b Electrical energyElectrical energy helps move energy from one place to another

Here, the fossil fuel transfers stored chemical energy to electricity to light/sound/ heat.

Most power stations use fossil fuels to make electricity ...

... which is transmitted through cables ...

... which we can then use in our homes.

stored chemical energy electrical energylight energy (or sound, movement or heat energy)

The energy transferred is sometimes non-useful

The energy transfer diagram for a runner wouldlook like this:

+chemical (stored)energy

runnerkinetic

(movement)energy

heatenergy

soundenergy

What would the energy transfer be for a match?What energy is useful? What isn’t?

Stations• There are 8 stations.• You have 3 minutes at each station to draw the transfer of

energy at each one.