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Section 1 - Intro
Section 1 - Intro
Complete the prior knowledge placemat activity below, thinking about Heat and all the things you already know about it.
Section 2 - What is Heat?
Section 2 - What is Heat?
Summary notes to copy & complete;
All objects have heat because they are made up of a____________ and m____________________ that move.
In colder objects the particles move more s________________ so have less heat.
Heat is a form of e________________.
The amount of heat energy something has is due to;
the s____________ the particles move
how many p____________________ are in the object (how big it is)
the type of particles (solid, l_______________ or gas)
This is why an iceberg has m_________ heat energy than a hot cup of tea, and a burning match has l_______ heat energy than a large ice sculpture.
Q's to answer after watching the video;
Why did his first experiment fail? What can we learn from this for doing our own experiments?
Why does the metal feel colder than the book?
Why would the cake tin burn your hand more than the cake?
heat_energy_3-4_natl_heat_sources_ifile_sea_vents (1).pdfheat_energy_3-4_natl_heat_sources_ifile_wildfires.pdfheat_energy_3-4_natl_heat_sources_ifile_volcanoes.pdfSection 3 - Experimenting with heat - Hot chocolate practical
Section 3 - Experimenting with heat - Hot chocolate practical
Starting questions, think about the following questions and write down your ideas about these.
When you make a hot drink why doesn't it stay hot?
What factors make it cool down faster or slower?
An experiment was carried out to determine the effects of different vessels on the cooling of a hot beverage.
Identify some controlled variables that would need to be kept the same to make this a fair/valid experiment.
a) Process the data collected from the hot chocolate experiment in the table below, using google sheets calculate the change in temperature of the hot drink.
Present this data as a suitable graph (ensure you add labels, units and titles to your graph.
Complete the write up below by adding in your completed table and graph from google sheets and answering the questions.
Section 4 - Heat concepts
Section 4 - Heat concepts
Concept 1 - Expansion & Contraction
Concept 1 - Expansion & Contraction
If you carry out the expanding balloon, metal ball and ring and the rising thermometer experiments, you will see examples of solids, liquid and gases expanding and contracting.
Watch the video below about the concepts of expansion and contraction, then use that info and the images below to complete the following tasks;
Define expansion and contraction
Explain for each experiment illustrated below - a) Ball & Ring b) Rising thermometer c) expanding balloon
Why we see the results we do (in terms of particle theory)?
Identify 3 examples of where expansion and contraction of matter affects our lives.
Concept 2 - Conduction
Concept 2 - Conduction
Watch the 2 videos below, and complete the following tasks;
Define conduction
Draw a labelled diagram that illustrates conduction (at the particle level)
Complete the conduction experiments below; your teacher will demonstrate what to do, you then carry it out, collect data, answer the summary questions, conclusion and discussion.
Conduction experiment 1 - Falling paper clips
Conduction experiment 2 - Balloon or bust?
Before completing the experiment record your predictions connecting them to the ideas of conduction if you can.
Predictions: The balloon filled with air will ....... due to ........
where as the balloon filled with water will ....... due to .........
Balloon or bust
a) Fill one balloon with air.
b) Fill a second ballon with approximately the same amount of water
c) Light the candle.
d) Prepare a stop watch, start timing when you hold the balloon filled with air directly in contact with your candle flame. Stop timing when the balloon pops.
e) Repeat step d) with the water filled balloon.
Record your results.
Write a conclusion and a discussion linking to the science ideas of why you see the results you do.
Conduction experiment 3 - Heat transfer
Concept 3 - Convection
Concept 3 - Convection
a)The diagrams above all illustrate convection. After looking at these diagrams write down any ideas you have about what convection is.
b) Now use https://www.britannica.com/ and search for a definition for convection. Write this in your notes.
c) Complete the 3 convection related practicals (your teacher will provide demonstrations & equipment, see images below)
CONVECTION SPIN
HOT & COLD JARS
FLYING TEABAGS
d) Record your observations. Including illustrations of what happens.
e) Explain the science of these observations (Key words/kupu to use - Convection, density, particles, gas, liquid, energy, convection current, heat)
f) Copy and complete the convection current image & notes below.
g) Use these ideas to explain how a hot air balloon works to take people on hot air balloon flights.
Concept 4 - Radiation
Concept 4 - Radiation
Work through the thermal energy transfer interactive below, with focus on the radiation slide.
a) Summarise 3 key points about radiation
b) How does radiation affect you when cooking marshmallows over a campfire?
c) why does a room full with many people get warmer than a room with just a few people?
Designing an experiment - Which types/colours of surfaces absorb radiant heat the best?
Complete the following before carrying out your experiment. Check with your teacher about available equipment. (See picture right for ideas)
Identify a hypothesis,
Independent variable,
Dependent variable
3 controlled variables
Basic method
Results table
Write a conclusion from your collected data.
4. Radiant Heat
Watch the 2 video clips and answer the questions to recap your understanding about radiant heat;
Heat Transfer/Radiation video
a) What type of cameras detect infrared radiation?
b) Why can we still feel heat from the sun even though it is so far away?
c) Copy and complete the sentence;
Dark, Matt surfaces are _____________ absorbers and emitters of r______________, where as, light and shiny surfaces are ____________ absorbers and emitters of radiation.
d) Why are solar panels black?
e) Why is the inside of a thermos cup/flask shiny?
Radiant Heat video
f) What causes most deaths from bushfires?
g) What damage can small amounts of radiant heat do to your skin?
h) What effects does heat stroke have on your body?
i) What are some things you could do to help protect yourself in bushfires?
5. Absorbing radiant heat - Interpreting experiments
Each flask is painted a different colour; matt black, matt grey, white and shiny silver.
Each flask has 200mL of cold water inside, and they are placed next to a radiant heat source for 20 mins.
a) Which flask would get the hottest? Why?
b) Which flask would be the coldest after 20 minutes? Why?
c) Explain how the heat gets from the radiant heat source into the water using the heat transfer ideas of radiation and conduction.
d) Use your ideas from above to explain why solar showers used for camping are black.
Need more information or not sure about some ideas... watch the videos below or read the following summary notes.
Summary notes on Heat transfer methods;
Summary notes on Heat transfer methods;
- Conduction; Conduction is the transfer of heat energy by direct contact. The particles within a hot object vibrates and causes neighbouring particles to vibrate allowing the heat to travel through the material from the heat source to the colder parts of the material. As the particles gain heat energy they vibrate more (have more kinetic energy) and can bump into neighbouring particles and pass on some of this heat energy to them. Materials that allow heat to easily travel through them are called conductors. Metals are good conductors of heat due to the way the particles are arranged closely together with free electrons. Non-metals are poor conductors and are called insulators.
- Convection; Convection is the transfer of heat energy by movement of liquid and gas(fluids) particles from one place to another. When heated, a fluid expands and becomes less dense as the particles move further apart. This creates a convection current as the hotter fluids rise and cooler fluids sink due to being more dense.
- Radiation; Radiation is the transfer of heat energy by electromagnetic waves. It can occur through empty space(vacuum). Like light, heat can be absorbed or reflected by objects. White or shiny surfaces reflect more heat energy than black or dull surfaces. Any warm object radiates heat. We rely on the sun's radiation to provide energy to our planet.
Section 5 - Applying heat transfer concepts
Section 5 - Applying heat transfer concepts
Complete the activities below to apply all your understanding of the 3 heat transfer methods.
Answer the questions in your books or on the worksheets provided by your teacher.
Energy-Worsheet-7th-Grade.pdf3-4_heat_energy_book_quiz_-_high.pdf
Section 6 - Heat of Hangi
Section 6 - Heat of Hangi
Use the videos and resource sheets below to help clarify your understanding of the heat concepts that apply to cooking Hangi.
2. In order to be best prepared for your assessment, you are to make a one page A3 resource sheet that covers all the key ideas about heat and heat transfer.
You may like to do this digitally and print it or by hand on a piece of A3 paper.
Make your resource sheet in a way that is easy for you to follow.
Some suggestions include;
Connecting ideas - making it like a mind map
Listing or bullet pointing key ideas in sections
Adding key headings in bold
Using colour
Adding labelled diagrams
Adding examples
You may like to look at the examples below to help you get started.
heat transfer revision.pptxSection 8 - Practise assessment
Section 8 - Practise assessment
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