Physics 1

Energy & Temperature

C/W Energy Transfer Apr 19, 2023

Aims:- 4 list energy forms

5 draw energy transfer diagrams

6 explain what efficiency means

• Starter – 5 minutes

• Write down as many different forms of energy as you can think of e.g. heat energy

Copy notes – 2 minutes

• There are nine forms of energy; four stored and five ‘on the move’ …

Stored Moving

Chemical Kinetic (movement)

Elastic Heat

Gravitational Light

Nuclear Sound

Electrical

Copy notes – 5 minutes

• Energy is measured in joules (J) and never gets used up – it is “conserved”

• When something happens, energy is being changed from one form into another– e.g. dropping a ball turns gravitational energy

into kinetic energy– e.g. using a toaster turns electrical energy into

heat energy

Activity – 15 minutes

• Cut out 4 devices from the catalogue

• Decide what energy changes they cause

• Stick-in the picture and add arrows to show the energy transfers, like this …

Electrical

Heat

Sound

Extension: make up numbers of joules to add to the arrows

Copy notes – 2 minutes

• Some energy transfers are useful and others are wasted– e.g. a light bulb transfers energy usefully as

light, but wastes energy as heat

• Devices that waste less energy are called energy efficient

Activity – 10 minutes

• On your arrows, highlight the transfers that are useful and wasted using different colours

Electrical

Heat

Sound

Extension: work out how efficient the device is using your numbers

Plenary – Questions – 10 mins

1. What form of energy is stored in a battery?

2. What is the unit of energy?3. If 100J of energy goes into a kettle, and

90J is converted to heat, how much sound energy comes out? How do you

know?4. What device turns sound energy

into electrical energy?

Homework

• Either (easier)• Do three more devices using pictures from

the newspaper or magazines at home• Or (harder)• Make a chart with all forms of energy on it

and lines joining them up – on the lines write the name of a device that converts those types of energy into each other

Are You On Target Today?

Aims:- 4 list energy forms

5 draw energy transfer diagrams

6 explain what efficiency means

C/W Energy Resources Apr 19, 2023

Aims:- 4 name some energy resources

5 describe how they are useful

6 compare their pro’s and con’s• Starter – 5 minutes• Which energy resources are these?

We ‘av Sam is bo!

Can rule Is full of e’s

Arsol

Copy notes – 5 minutes

• Energy resources are used to generate electricity by turning a turbine attached to a generator

• Resources which will not run out are called renewable

• Fossil fuels (coal, oil and gas) are non-renewable

• Burning fuels releases carbon dioxide into the atmosphere which may cause global warming

Practical – Wind Power – 30 mins

• Set-up the equipment as shown

• Draw a labelled diagram• Record the voltage

generated with the hairdryer at different distances from the turbine

• Plot a graph of your results

Cork

Slots forcardboard vanes

Generator

Voltmeteron 200mV

Wires to COMand VΩmA holes

Turbine

Plenary – Questions – 10 mins

1. What did you find out from the experiment? (Hint: The more … the more …)

2. How did you make it a fair test?

3. List three fossil fuels

4. What does renewable mean?

5. List three renewable energy resources

Homework• Everyone (easier)• Find two examples of ‘biomass’ and describe

them (include one pro and one con)• Extra for superstars (harder)• Find out what ‘hydroelectric’ power is, and draw

an energy transfer diagram (Hint: it has three steps ending with ‘electrical’)

For help on both, look on: http://home.clara.net/darvill/altenerg/index.htm

Email Word docs to drwelch@teacher.com

Are You On Target Today?

Aims:- 4 name some energy resources

5 describe how they are useful

6 compare their pro’s and con’s

C/W What is Heat? Apr 19, 2023

Aims:- 4 know that heat flows from hot to cold

5 describe what happens when heating

6 explain features of a cooling curve

Starter – 5 minutes – True or False?1. Heat is a form of energy

2. Heat is measured in ºC

3. Heat rises

4. There are particles of heat

5. A fridge door stops the cold getting out

C/W What is Heat? Apr 19, 2023

Aims:- 4 know that heat flows from hot to cold

5 describe what happens when heating

6 explain features of a cooling curve

Starter – 5 minutes – True or False?1. Heat is a form of energy

2. Heat is measured in ºC

3. Heat rises

4. There are particles of heat

5. A fridge door stops the cold getting out

Copy notes – 5 minutes

• Heat is a form of energy

• Heat energy moves from areas of high temperature (hot) to areas of low temperature (cold)

• Remember: Heat energy can move to or

from the surroundings (the air)

Copy notes – 5 minutes

• When something absorbs heat energy– its particles move faster– it expands and– its temperature goes up …

• … until it melts/boils, then– its particles spread apart and– its temperature stays the same while it is

melting/boiling.

Watch Animation

Play ‘heating’ in ‘KS3 Resources’

Watch Demo

Datalog stearic acid curve

Copy and label graph from demo

Plenary – Interactive

DnD ‘particles’ in ‘Whiteboard’

Homework• Everyone (easier)

• Describe what happens to an ice cube left out in a warm room – use these words: ‘heat’, ‘energy’, ‘flow’, ‘temperature’, ‘melt’, ‘particles’, ‘surroundings’

• Extra for superstars (harder)–Explain why the temperature of water in

a pan never goes above 100ºC no matter how much heat you put in (Think: where is heat also getting out?)

Are You On Target Today?

Aims:- 4 know that heat flows from hot to cold

5 describe what happens when heating

6 explain features of a cooling curve

C/W How is Heat Transferred Apr 19, 2023

Aims:- 4 know four ways for heat to flow

5 describe how each is different

6 explain each using a particle model

• Starter – 5 minutes

• What is this dingbat?

HOT!

Copy notes – 2 minutes

• Heat can be transferred in four ways:– Conduction– Convection– Radiation– Evaporation

Find Out and Explain

• Heat can be transferred in four ways:– Conduction p106 p8, 50 p84

p4.7– Convection p110 p8-9, 50-1 p84

p4.7– Radiation p112 p9-11, 51 p84

p4.7– Evaporation p115

Pages in orange in orange book (Heinemann 2)Pages in blue in blue book (Physics by Milner)Pages in purple in purple book (Physics for AQA)Pages in yellow in yellow book (Modular Science)

Demo’s

When finished, draw and explain each demo in your own words

Wood/metal rod, conv ring, alcohol

Homework• Revision for test

Are You On Target Today?

Aims:- 4 know four ways for heat to flow

5 describe how each is different

6 explain each using a particle model