Cell phone towers and emergency technology
Cellphone towers as frame structures, emergency food and shelter, and protective clothing for rescue workers. Read one part at a time and tap “I know this”. Then test yourself in the quiz.
Know it already? Jump straight to the quiz
Towers and cranes
- A flat strip of card becomes stiffer when you fold it into an L or roll it.
- A tower can be disguised to look like a tree or palm.
- Crane starting to tip? Add a counterweight or widen the base.
Protective clothing
| Worker | Clothing or equipment | Why |
|---|---|---|
| Firefighter | Outer shell, moisture barrier, liner; breathing apparatus | Resists flames and heat; the liner traps air (poor conductor); smoke is dangerous |
| NSRI sea rescuer | Bright, waterproof, with reflective strips | Stays dry and is seen; strips shine in headlights |
| Welder | Leather apron and dark visor | Blocks sparks and bright light |
| Police diver | Neoprene wetsuit | Foam full of tiny bubbles keeps warm |
| Miner | Hard hat with lamp; boots with steel toecaps | Rocks may fall, and it is dark |
| Beekeeper | White, smooth suit | Bees stay calmer near pale cloth |
| Astronaut | Spacesuit with air pressure and oxygen | There is no air in space |
- Emergency food after a flood: tinned or dried food that keeps long, and it must be nutritious for energy.
- Emergency shelter: goes up fast, keeps out the weather and is easy to transport.
- Indigenous builders: mud, reeds and thatch. Shacks of wood and plastic burn easily and stand close together.
Landline or cellphone?
| Landline | Cellphone | |
|---|---|---|
| Advantage | Clear sound; works without a battery | Works wherever there is signal; messages and internet |
| Disadvantage | Only in one place; cables can be stolen | Battery must be charged; needs towers |
Remember this and test yourself
- Towers are frame structures: strong, light and let wind through; on high ground so signals reach further.
- A wide base and cross-bracing (triangles) keep a tower stable in strong wind.
- “Spoils the view” = visual pollution; residents want to be consulted.
- Firefighter suit: outer shell, moisture barrier, liner.
- Nylon and polyester melt and stick to the skin: never under a firefighter’s suit.
Write these points in your book. Read them again the night before the test.
Firefighter suit from outside in: “Our Mighty Lifesavers” (outer shell, moisture barrier, liner).
Important words
First say what the word means, then turn the card over.
Match column A to column B
Tap a word in column A, then its meaning in column B. You can also start in column B.
True or false?
Read the question and the answer. Is the answer right? Tap True or False.
Now the real quiz!
The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.
Take the quiz: Cell phone towers and emergency technology- Read one part together and ask your child to tell it back in their own words.
- The ticks (“I know this”) are saved on this device only. We never ask for names or emails.
Follows CAPS for Grade 7 Technology (Technology). Always check your teacher’s notes and textbook too.