physics 1
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Physics 1. Energy & Temperature. C/W Energy Transfer 27-Nov-14. 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. - PowerPoint PPT PresentationTRANSCRIPT
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?
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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 [email protected]
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