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Communication: letters, phones, radio and the internet

Tests: 6 of 14 right · Exam: 1 of 4 right · Kind: ★★★ · Understood: 8 of 18 · Run: 2026-10-18, commit f3c23ea72

Lesson 100 of the world course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · ★★★ · right ✓

In 1850 a merchant in London wants a reply from a friend in Sydney. Why will he wait so long?

  • 1. The letter and the reply must both go by ship — ← Mova's choice · ✓ the right answer · no support
  • 2. Letters to Australia had to be written twice — no support
  • 3. Post offices opened only once a year then — no support
  • 4. The telegraph to Australia was much too expensive to use — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 2 · ★★★ · right ✓

Beacon fires on hilltops could warn a whole country of an invasion in hours. Why could they not send a long story?

  • 1. Fire travels more slowly than a horse — no support
  • 2. Beacons could only be lit in the daytime — no support
  • 3. A fire can only show a simple signal agreed in advance — ← Mova's choice · ✓ the right answer · score 5
  • 4. Nobody could see fire from another hill — no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 5, the only option with support. Its support: lesson 100, line 1: «For most of history a long message could travel only as fast as the person or animal carrying it. A letter from Britain to Australia went by ship and took mont…», reached through the same lesson line as the sentence the question matched. What matched: the same action «agree» (+3); the same place «advance» (+3). Against it: a different thing acted on (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 3 · ★★★ · right ✓

A ship sends three short, three long and three short flashes of light at night. What is it telling you?

  • 1. It is about to leave the harbour — no support
  • 2. It has just caught many fish — no support
  • 3. It is in danger and needs help — ← Mova's choice · ✓ the right answer · score 7
  • 4. It is greeting another ship — no support

Why: It took the question to ask what it is done to. It chose option 3 with score 7, the only option with support. Its support: lesson 5, line 3: «Light from the Sun takes about eight minutes to reach us, while light from the next nearest star takes more than four years.», reached through the option's own match among the sentences about the question's things. What matched: the same action «take» (+5); the same doer «light» (+2). · the question and its options parsed, with trees and pragmatics

Test 4 · ★★★ · wrong ✗

A radio signal is sent to astronauts on the Moon, about 384,000 kilometres away. Roughly how long does it take to arrive?

  • 1. About one hour — ← Mova's choice · no support
  • 2. A little more than one second — ✓ the right answer · no support
  • 3. About one day — no support
  • 4. It arrives at exactly the same instant — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 5 · ★★★ · wrong ✗

Lightning and thunder happen together, but you see the flash before you hear the thunder. What does this show about radio waves, which travel like light?

  • 1. They travel at the speed of sound — ← Mova's choice · score 11
  • 2. They cannot travel through air — score 5
  • 3. They are slower than sound — score 4
  • 4. They are much faster than sound — ✓ the right answer · score 4

Why: It took the question to ask who or what does it. It chose option 1 with score 11, against 5 for the next best. Its support: lesson 100, line 4: «In 1876 Alexander Graham Bell patented the telephone, which turns the voice into a changing electric current and back into sound at the other end. Radio needs…», reached through the remembered sentence the question matched. What matched: the same place «speed» (+6); it fills the role the question asks for (+3); the same action «travel» (+1); the same doer «radio waves» (+1). The right option, 4, scored 4. · the question and its options parsed, with trees and pragmatics

Test 6 · ★★★ · wrong ✗

Which is a broadcast rather than a one-to-one message?

  • 1. A text message to one friend — ← Mova's choice · no support
  • 2. A private phone call to Gran — no support
  • 3. A letter to your aunt in Wales — no support
  • 4. A radio news programme — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 7 · ★★★ · right ✓

A storm snaps a telegraph wire between two towns. Which way of sending messages still works between them?

  • 1. Radio, because it needs no wire — ← Mova's choice · ✓ the right answer · score 11
  • 2. Morse code sent along the broken wire — no support
  • 3. A telephone on the same wire — score 4
  • 4. The telegraph, by shouting louder — no support

Why: It took the question to ask who or what does it. It chose option 1 with score 11, against 4 for the next best. Its support: lesson 100, line 4: «In 1876 Alexander Graham Bell patented the telephone, which turns the voice into a changing electric current and back into sound at the other end. Radio needs…», reached through a sentence linked to the one the question matched. What matched: the same action «need» (+3); the same thing acted on «wire» (+3); it fills the role the question asks for (+3); the same doer «radio» (+2). · the question and its options parsed, with trees and pragmatics

Test 8 · ★★★ · wrong ✗

Which list puts these in the order they appeared?

  • 1. World Wide Web, radio, telephone, postage stamp — ← Mova's choice · score 5
  • 2. Telephone, postage stamp, World Wide Web, radio — score 5
  • 3. Radio, World Wide Web, postage stamp, telephone — score 5
  • 4. Postage stamp, telephone, radio across the Atlantic, World Wide Web — ✓ the right answer · score 5

Why: It took the question to ask who or what does it. It chose option 1 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 48, line 1: «History is the story of how people lived in the past; we put events in order on a timeline, a line where each step stands for the same number of years, like th…», reached through the remembered sentence the question matched. What matched: the same place «order» (+6); the same action «put» (+1). Against it: a different doer (counts against) (-1); a different thing acted on (counts against) (-1). The right option, 4, scored 5. · the question and its options parsed, with trees and pragmatics

Test 9 · ★★★ · wrong ✗

Why could the Morse telegraph send any word, unlike beacon fires?

  • 1. Each word had its own separate wire — ← Mova's choice · no support
  • 2. The wires carried the sender's real voice — no support
  • 3. The operators knew every message in advance — no support
  • 4. Every letter had its own pattern of signals — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 10 · ★★★ · wrong ✗

A message travels around the Earth's equator, about 40,000 kilometres, at the speed of light. About how long would it take?

  • 1. About one minute and a half — ← Mova's choice · no support
  • 2. Around one hour, maybe more — no support
  • 3. Roughly ten whole seconds — no support
  • 4. A small part of a second — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 11 · ★★★ · wrong ✗

whats SOS in morse

  • 1. Six dots and six dashes — ← Mova's choice · no support
  • 2. Three dashes, three dots, three dashes — no support
  • 3. Three dots, three dashes, three dots — ✓ the right answer · no support
  • 4. One dot, one dash, one dot — no support

Why: Nothing it remembers matched the question, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 12 · ★★★ · right ✓

how'd people send a long msg before the telegraph

  • 1. Someone had to carry it by foot, horse or ship — ← Mova's choice · ✓ the right answer · no support
  • 2. They sent it by radio — no support
  • 3. They just rang them up on the telephone from home — no support
  • 4. They emailed it — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 13 · ★★★ · right ✓

Leo says Tim Berners-Lee invented the phone. true?

  • 1. Yes, and also the radio — no support
  • 2. No, he invented the telegraph — score 3
  • 3. No, he invented the World Wide Web; Bell patented the telephone — ← Mova's choice · ✓ the right answer · score 7
  • 4. Yes, he made the first phone in 1876 — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 7, against 3 for the next best. Its support: lesson 100, line 17: «Tim Berners-Lee invented the World Wide Web in 1989.», reached through the remembered sentence the question matched. What matched: the same action «invent» (+4); the same thing acted on «world wide web» (+2); the same doer «tim» (+1). · the question and its options parsed, with trees and pragmatics

Test 14 · ★★★ · wrong ✗

my brother reckons radio waves are way slower than sound. right?

  • 1. Yes, they move as fast as a car — score 5
  • 2. No, they travel at the same speed as sound — ← Mova's choice · score 9
  • 3. No, they travel at the speed of light, much faster than sound — ✓ the right answer · score 9
  • 4. Yes, radio waves move slower than sound — score 5

Why: It took the question to ask which statement is true. It chose option 2 with score 9, tied with another option at 9 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 100, line 4: «In 1876 Alexander Graham Bell patented the telephone, which turns the voice into a changing electric current and back into sound at the other end. Radio needs…», reached through the remembered sentence the question matched. What matched: the same action «travel» (+4); the same place «speed» (+4); the same doer «radio waves» (+1). The right option, 3, scored 9. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Which of the following statements most accurately characterises Morse code?

  • 1. Each letter is written as a pattern of short and long signals — ← Mova's choice · ✓ the right answer · score 9
  • 2. Each letter is drawn as a small picture — no support
  • 3. Each letter is written as a coloured flag — score 8
  • 4. Each letter is spoken aloud over a telephone — no support

Why: It took the question to ask who or what does it. It chose option 1 with score 9, against 8 for the next best. Its support: lesson 100, line 9: «Morse code writes each letter as a pattern of short and long signals, called dots and dashes.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «letter» (+5); the same action «write» (+3); the same circumstance (+1). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Identify the person who patented the telephone, together with the year thereof.

  • 1. Tim Berners-Lee, in 1989 — ← Mova's choice · no support
  • 2. Alexander Graham Bell, in 1876 — ✓ the right answer · no support
  • 3. Alexander Graham Bell, in 1840 — no support
  • 4. Guglielmo Marconi, in 1901 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Ascertain the speed at which radio waves travel.

  • 1. The speed of a fast train — ← Mova's choice · no support
  • 2. The speed of sound, about one kilometre in three seconds — no support
  • 3. The speed of light, about 300,000 kilometres per second — ✓ the right answer · no support
  • 4. About 300 kilometres per second — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response that is consistent with the established facts concerning a broadcast.

  • 1. One sender transmits a private message to one person — ← Mova's choice · no support
  • 2. Many senders transmit to one person — no support
  • 3. Messages are carried by hand from house to house — no support
  • 4. One sender transmits the same message to many people at once — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/100-communication-letters-to-internet/