Mini Minds Hub · Free printable
Wave Mystery Trading Cards: Free Printable Card Set for Year 9
- ForYear 9
- StageKey Stage 3
- CostFree
- FormatPrintable PDF
Wave Mystery Trading Cards is a free printable card set for Year 9 (ages 13 to 14), in Key Stage 3. Children read the clues on each card, name the electromagnetic wave, then rank the waves from longest to shortest wavelength. It needs only paper, scissors and a pencil, and page 2 gives the grown up the notes, help ideas, a stretch task and the answers.
It comes from the Mini Minds Hub, the free library of printables from Jaques of London, the British games and toy company that has been making games for families since 1795. Print both pages, give page 1 to your teenager or class and keep page 2 for yourself. Black and white printing works well.
What is on the sheet
Children cut out a set of six mystery cards. Each card gives clues about the uses and properties of one electromagnetic wave. They work out which wave it is, write the name in a table, then rank the six from longest to shortest wavelength. Numbered questions follow, with space to write answers. Some ask for a reason, so children must explain their thinking, not just name a wave.
- Card
- Wave name
- Wavelength rank (1 = longest, 6 = shortest)
- Do cards B and E travel at the same speed in a vacuum? Explain.
Why study the electromagnetic spectrum?
Electromagnetic waves are all around us. They carry energy from place to place, and we use them in communication, medicine, cooking, security and astronomy. Scientists group them into a family called the electromagnetic spectrum. The waves in this family differ in wavelength and frequency, and that difference explains why each type is useful for different jobs.
In Key Stage 3 physics, pupils start to link what a wave is like with what it can be used for. Clue based tasks help because pupils must connect a use to a property, then place the wave in order. That is the same thinking they will need later in GCSE physics, where the spectrum appears again in more detail.
Quick wave facts
- Wavelength is the distance from one peak of a wave to the next peak.
- Frequency is the number of waves that pass a point each second. It is measured in hertz.
- For electromagnetic waves, a longer wavelength means a lower frequency.
- Visible light is only a small part of the electromagnetic spectrum.
- Sound is not an electromagnetic wave. It needs a material to travel through, such as air.
Skills and curriculum link
- Using clues to identify
- Ordering by wavelength
- Explaining wave properties
- Scientific vocabulary
- Reasoning from evidence
Thinking skills on this sheet
- IdentifyingPick out the key words in each clue. Some clues describe a use and some describe a property. Use both together to narrow down which wave the card is about.
- OrderingRank by wavelength, not by frequency or by how useful a wave seems. Write which end is longest and which is shortest before you start.
- ExplainingA good explanation states an idea and then gives a reason for it. Pupils should write a full sentence, not just yes or no.
- CheckingOnce the table is full, read the order from top to bottom. Ask if each wave fits between its neighbours. Then compare with the key on page 2.
Key words
- Electromagnetic waveA wave of energy made of electric and magnetic fields. Light is one example.
- WavelengthThe distance from one peak of a wave to the next peak.
- FrequencyThe number of waves that pass a point each second.
- SpectrumThe whole range of electromagnetic waves, arranged in order of wavelength or frequency.
- VacuumA space with no matter in it, not even air.
- PropertyA feature that describes how something behaves or what it is like.
How to use it
- Print both pages. Page 1 is for the child. Keep page 2, which has the notes and answers.
- Cut out the cards. Read them one at a time and underline the key clue words.
- Name each wave in the table. Then rank the waves from 1 (longest wavelength) to 6 (shortest).
- Answer the questions in full sentences. Give a reason, not only a short answer.
- Check against the key on page 2. Talk about any card that was placed differently, then come back to the sheet another day.
Help, stretch and game ideas
If it feels too hard
Give a word bank of the six wave names and the order of the spectrum from radio to gamma. Start by matching the easiest clues first. Then use the spectrum order to place the rest. Work on two or three cards at a time.
To stretch confident children
Write a seventh card for visible light. Then add one safety fact to each card. Swap your new card with a partner and see whether they can name the wave and place it correctly in the ranking.
Make it a game
Cut the cards out. One player reads a clue aloud and the others race to name the wave. The first correct answer wins the card. When all cards are won, players line up their cards in wavelength order.
Mistakes to watch for
Watch forThe ranking is the wrong way round, with the shortest wavelength ranked 1.
Try thisWrite longest at the top of the table and shortest at the bottom before starting. Check the key words in the table heading.
Watch forWavelength and frequency get mixed up.
Try thisDraw a short wave and a long wave. Count the peaks in the same space and link more peaks to higher frequency.
Watch forThe explanation is only yes or no.
Try thisAsk why. Use the sentence starter: I think this because. Then add one fact that supports the answer.
Talk about it
- Which clue helped you most, and why?
- Which card was hardest to name? What made it tricky?
- How did you decide which wave had the longest wavelength?
- What is the difference between wavelength and frequency?
- Where might you meet electromagnetic waves in everyday life?
- What would you put on a card for visible light?
Take it off the page
Rope waves
Two people hold a long skipping rope. One shakes it gently. Try slow shakes and fast shakes, and look at how the distance between peaks changes.
Draw the waves
Draw three waves on paper with different wavelengths. Label one peak to peak distance on each. Say which has the highest frequency.
Home spectrum hunt
List devices at home that use electromagnetic waves. Talk about what each device needs the waves to do.
Who it is for
Parents
You do not need to be a physicist. Read the cards with your teenager and ask them to explain each choice. If you are unsure, check page 2 together afterwards and talk about any differences.
Teachers
Use it as a starter, plenary, early finisher task or homework. It needs no preparation beyond printing and cutting. Pairs can swap cards and justify their rankings, which suits mixed ability groups.
Home educators
Print the sheet as part of a wider science plan. It pairs well with books about light and waves, simple rope experiments and everyday talk. It can be reused later for revision or for a younger sibling.
Where this fits
Before this sheet, pupils will have met waves in general, including ideas such as amplitude, wavelength and frequency. They may also have compared sound waves with light waves. Confident use of those words makes the clues easier to read.
After it, pupils can move on to how different waves are absorbed, reflected or transmitted, and to the uses and risks of electromagnetic radiation. These ideas are built on further in GCSE physics.
Questions parents and teachers ask
- What age is Wave Mystery Trading Cards for?
It is written for Year 9 (ages 13 to 14), in Key Stage 3. It also works for confident Year 8 pupils or as revision for older pupils who need a quick recap of the electromagnetic spectrum.
- What will children practise?
Children practise identifying electromagnetic waves from clues about their uses and properties, and ordering them by wavelength in physics. They also practise explaining wave properties in their own words.
- How do I use it?
Print both pages. Children read the clues, fill in the table and answer the questions. They can work alone or in pairs. Then check against the key on page 2 and talk about any differences.
- What if it feels too hard?
Give a word bank of the six wave names and the order of the spectrum from radio to gamma. Let the child match the easiest clues first, then use the order to place the rest.
- Is it free?
Yes. It is free to print for home and classroom use. You can print it again for brothers, sisters, other classes or revision later in the term.
- Can teachers use it in class?
Yes. It works as a starter, plenary, early finisher task, homework or table activity. It needs no preparation beyond printing and cutting out the cards, and page 2 supports mixed ability groups.
- Do I need to print in colour?
No. It prints well in black and white on plain A4 paper. It is also a screen free activity that needs only paper, scissors and a pencil, so it suits quiet time at home.
Preview the full PDF
Made by Jaques of London, making games for families since 1795. A printable supports classroom learning and does not replace a teacher.