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Sleep and the body clock

Tests: 3 of 11 right · Exam: 0 of 4 right · Kind: ★ · Understood: 3 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 127 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 · ★ · wrong ✗

Ollie: "I'm 10, I only need 6 hours' kip like Dad." ("Kip" means sleep.) Mum: "Not a chance, sunshine." Why is Mum right?

  • 1. Children need exactly 6 hours, just the same as adults — ← Mova's choice · no support
  • 2. Adults actually need a lot more sleep than children do — no support
  • 3. Children need 6 hours on school nights, more at weekends — no support
  • 4. Children need about 9 to 12 hours, more than adults — ✓ 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 2 · ★ · wrong ✗

Lexi plays on her tablet in bed till half ten, then she's "dead on her feet" at school. What does that mean, and why?

  • 1. Very bored: school is dull after games — ← Mova's choice · no support
  • 2. Very cold: she forgot her coat — no support
  • 3. Very ill: tablets give you a fever if you use them in bed at night — no support
  • 4. Very tired: too little sleep, and the screen delayed it — ✓ 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 3 · ★ · wrong ✗

Mia: "Saturday, I could have a lie-in, but my body's like nope." (A lie-in is sleeping late.) What's happening?

  • 1. She isn't tired at all because it's the weekend — ← Mova's choice · no support
  • 2. Her body runs on a 7-day clock, not a daily one — no support
  • 3. Her body clock wakes her at the usual time — ✓ the right answer · no support
  • 4. Her body clock is broken and needs to be fixed — 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 4 · ★ · right ✓

Big brother Sam, 16, can't sleep before midnight. Dad: "Lazy." Mum: "It's his age." Who has the science on her side?

  • 1. Mum: teenage body clocks shift later — ← Mova's choice · ✓ the right answer · score 9
  • 2. Dad: teenagers just choose to be lazy — no support
  • 3. Neither: teenagers have no body clock — no support
  • 4. Dad: teenagers need only about 5 hours — score 1

Why: It took the question to ask who or what does it. It chose option 1 with score 9, against 1 for the next best. Its support: lesson 127, line 4: «In teenagers the body clock shifts later, so they feel sleepy late and hate mornings: partly biology, not just laziness. Fly across time zones and your body cl…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+4); the same doer «body clock» (+3); the same action «shift» (+2). · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · right ✓

Ivy, in LA at 3 pm, nodding off over her burger: "This is so mid." ("Mid" means rubbish.) Why's she so sleepy?

  • 1. Her body still thinks it's 11 pm London time — ← Mova's choice · ✓ the right answer · no support
  • 2. She ate too much American food — no support
  • 3. LA air has less oxygen than London — no support
  • 4. The flight made her lose a whole night — 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 6 · ★ · wrong ✗

Kai's dad, wide awake at 3 am after Tokyo: "Jet lag's a nightmare, mate." What time does his body think it is?

  • 1. About 6 pm, Tokyo time — ← Mova's choice · no support
  • 2. About noon, Tokyo time — ✓ the right answer · no support
  • 3. About 3 am, like London — no support
  • 4. About midnight, Tokyo time — 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 ✓

Ella: "Babies sleep 15 hours? Lucky." If a baby sleeps 15 hours a day, how long is it awake?

  • 1. About 9 hours, in short bits — ← Mova's choice · ✓ the right answer · no support
  • 2. About 1 hour — no support
  • 3. About 24 hours — no support
  • 4. About 15 hours in one go — 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 8 · ★ · wrong ✗

Zane, after an all-nighter at a sleepover: "Never again, bruv." He's grumpy for two days. What does this show?

  • 1. All-nighters make you stronger — ← Mova's choice · no support
  • 2. One lost night can cost two days; sleep can't be caught up at once — ✓ the right answer · no support
  • 3. Grumpiness comes from too much sleep — no support
  • 4. Sleep can be saved up before a sleepover — 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 9 · ★ · wrong ✗

What would happen if you lived in a cave with no clocks and no daylight for weeks?

  • 1. You would stop sleeping altogether — no support
  • 2. Your body would switch to a 12-hour day — no support
  • 3. You would fall asleep and wake up at totally random times — ← Mova's choice · score 4
  • 4. Your body clock would keep running on about 24 hours — ✓ the right answer · no support

Why: It took the question to ask what happens next. It chose option 3 with score 4, the only option with support. Its support: lesson 127, line 12: «Sleep from 8:30 pm to 7:00 am is 10 hours 30 minutes; to sleep 10 hours and wake at 7 am, you must fall asleep at 9 pm.», reached through the option's own match among the sentences about the question's things. What matched: the same action «fall» (+3); the same property (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

Mila: "Do flowers have body clocks, miss?" What's the answer?

  • 1. Yes, but only roses — ← Mova's choice · no support
  • 2. Yes, some open in the morning and close in the evening — ✓ the right answer · no support
  • 3. No, plants never keep time — no support
  • 4. No, only animals with brains do — 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 ✗

Jake's mate from Texas: "Y'all go to bed at 9? I'm fixin' to stay up all night!" ("Fixin' to" means about to.) Jake wakes at 7 and needs 10 hours. Who's sensible?

  • 1. Neither: 10-year-olds need only about 6 hours — ← Mova's choice · score 7
  • 2. The mate: staying up all night is really healthy — no support
  • 3. The mate: sleep only really matters for babies — no support
  • 4. Jake: asleep by 9 pm gives him his 10 hours — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 1 with score 7, the only option with support. Its support: lesson 127, line 3: «To choose a bedtime, count back from your wake-up time: up at 7 am and needing 10 hours means asleep by 9 pm. Bright screens in bed tell the brain "it's still…», reached through the remembered sentence the question matched. What matched: the same action «need» (+4); the same property (+3). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Which of the following statements most accurately characterises the circadian rhythm?

  • 1. An internal cycle of approximately seven days, reset by meals — ← Mova's choice · no support
  • 2. A cycle observable exclusively in human beings — no support
  • 3. An external cycle imposed by the striking of clocks — no support
  • 4. An internal cycle of approximately twenty-four hours, reset chiefly by light — ✓ 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

Exam question 2 · formal language · wrong ✗

Given that a child retires to sleep at 8:30 pm and rises at 7:00 am, ascertain the duration of sleep obtained.

  • 1. Eleven hours and thirty minutes — ← Mova's choice · no support
  • 2. Ten hours exactly — no support
  • 3. Nine hours and thirty minutes — no support
  • 4. Ten hours and thirty minutes — ✓ 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

Exam question 3 · formal language · wrong ✗

Identify the principal reason for which the use of bright screens before sleep delays its onset.

  • 1. The light increases the temperature of the bedroom — ← Mova's choice · no support
  • 2. The screens deplete the body's reserves of energy — no support
  • 3. The light diminishes the release of melatonin — ✓ the right answer · no support
  • 4. The screens emit sounds inaudible to the user — 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 consistent with the established facts concerning the recommended duration of sleep for children aged six to twelve years.

  • 1. Approximately fourteen to seventeen hours nightly — ← Mova's choice · no support
  • 2. Approximately nine to twelve hours nightly — ✓ the right answer · no support
  • 3. Approximately four to five hours nightly — no support
  • 4. Approximately six hours nightly, as for adults — 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/127-sleep-and-the-body-clock/