https://www.youtube.com/watch?v=wHYuMlV55EY

These lessons were made in another platform (Canva) so they are also provided below as a PDF.


✈️ Lead-in questions

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1. Match the definitions with their words

# Definition Word
1 a pattern resembling a series of crosses, intersecting each other a. glimpses
2 continuously increasing in size or number b. akin to
3 very strong or intense; difficult to resist or control c. ever-growing
4 similar to; sharing some characteristics with d. overpowering
5 spreading widely throughout an area or group of people; having an effect on everything e. jamming
6 interfering with radio signals by broadcasting other signals on the same frequency f. prompts
7 the act of interrupting or causing disorder or chaos g. rogue (radio waves)
8 a sudden and powerful increase or movement forward h. surge
9 present or found everywhere i. disruption
10 to assert one's right or ownership over something j. pervasive
11 radio waves that interfere with other signals and are not under anyone's control k. to lay claim to
12 cues or reminders that encourage someone to take action or do something l. ubiquitous
13 a brief or quick view or look at something m. crisscross

2. Fill in the gaps, then watch the video

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Word bank: the · in · crowded · of (×2) · can · between · to (×4) · just · for (×2) · less · as · from · into · by · waves · even · on (×2)

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Invisible signals, primarily radio ___(1), constantly crisscross the air around us, transmitting data ___(2) various electronic devices such ___(3) computers, GPS systems, and cell phones. These waves are so pervasive that, theoretically, if our eyes could see them, the signal from our mobile phone could be detected as far away as Jupiter.

However, this vast sea of signals can get ___(4) and cause interference, especially with the proliferation ___(5) Wi-Fi and the ever-growing demand ___(6) specific radio wave lengths.

A primary source ___(7) interference comes ___(8) cell phones, particularly those ___(9) airplanes. When people fail to switch their phones to airplane mode during a flight, the devices work harder to connect, emitting stronger signals.

Due ___(10) the plane's high speed, a phone can unexpectedly get too close to a cell tower, bombarding it with an overpowering signal and causing disruption ___(11) other devices on the ground. This is akin to unintentionally jamming radio signals, which can impact various services. Moreover, the ubiquitous use of electronics has led ___(12) a surge in rogue radio waves, affecting internet speeds and call quality, driving consumers to seek more bandwidth.

This, ___(13) turn, prompts service providers to lay claim ___(14) more of the available spectrum, leading to an ___(15) more congested airwave space. Furthermore, this over-saturation of radio signals isn't ___(16) an inconvenience for our daily communications; it also poses challenges for ___(17) field of astronomy. Radio telescopes, which observe deep space, rely ___(18) certain wave lengths.

___(19) instance, the Very Large Array ___(20) detect signals within our solar system ranging from 1 to 50 GHz. However, phones on 5G networks might interfere with signals below 5 GHz. In this radio-noisy world, only a few places remain where the skies are ___(21) congested, allowing for clearer cosmic observations.

These spots provide glimpses ___(22) the mysteries of space, such as the Milky Way's central black hole, unless they're interrupted ___(23) signals from carelessly used devices.