Week 09 · Computers Talk to Each Other
Monday
Wi-Fi is radio
// Wi-Fi, the internet and packets
⏱ about 15 min
Monday: Wi-Fi is radio
Rocket waves the tablet in the air.
"How does the video get in here?"
Raven looks around. "What do you notice? No wire!"
Nova hums. "Hint: radio waves are invisible."
Information in the air
Wi-Fi sends information with radio waves.
Radio waves move through the air.
You cannot see them or feel them.
A Wi-Fi box in your home sends the waves.
The tablet has a tiny radio inside.
It catches the waves and sends some back.
Walls and distance can make Wi-Fi weaker.
The Wi-Fi icon
- The Wi-Fi icon shows curved bars.
- More bars means a stronger signal.
- No bars means no Wi-Fi right now.
WI-FI CHECK
- Read the question.
- Tap your answer.
What does Wi-Fi use to send information?
Can you see radio waves?
What sends the Wi-Fi waves in a home?
The Wi-Fi icon shows many bars. What does that mean?
Think about what Nova said about the waves.
| Sentence | True or false? |
|---|---|
| Wi-Fi uses radio waves. | ? |
| You can feel radio waves on your skin. | ? |
| Walls can make Wi-Fi weaker. | ? |
| The tablet has a tiny radio inside. | ? |
WHY THIS EXERCISERadio waves are invisible. You cannot see or feel them.
A VIDEO REACHES THE TABLET
- Tap a card.
- Then tap its spot.
1First
2Next
3Then
4Last
Try it
With a grown-up, find the Wi-Fi icon on a device.
Count the bars.
Walk to another room. Count again.
What do you notice?
Count the bars.
Walk to another room. Count again.
What do you notice?
Safety first
Ask a grown-up before you touch the device.
Never touch the Wi-Fi box or its cords.
Walk, do not run, with a device.
Never touch the Wi-Fi box or its cords.
Walk, do not run, with a device.
STORY CHECK
- Read the question.
- Tap your answer.
What did Raven notice about the tablet?
What catches the radio waves in the tablet?
What comes right after the waves travel through the air?
Check the Wi-Fi icon list and the safety box.
| Sentence | True or false? |
|---|---|
| More bars means a stronger signal. | ? |
| Wi-Fi needs a wire to the tablet. | ? |
| A child should not touch the Wi-Fi box. | ? |
WHY THIS EXERCISEWi-Fi travels through the air. The box and cords are for grown-ups.
Draw a Wi-Fi box sending waves to a tablet.
Word Spot: put
Here are new sight words.
Look at each word. Say it. Spell it.
Put: P-U-T.
FIND THE WORD
- Listen to the word.
- Tap it.
Find the word you hear.
Find the word you hear.
FILL THE GAP
- Listen to the sentence.
- Tap the missing word.
I ___ my boots on.
___ the book on the shelf.
You found the invisible waves! Tomorrow we meet the internet.