Magnets, compasses and big Earth facts

Tests: 4 of 10 right · Exam: 0 of 4 right · Kind: ★ · Understood: 8 of 14 · Run: 2026-10-18, commit f3c23ea72

Lesson 17 of the myths 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 ✓

You're on a hike far in the north of Canada and the compass needle points a bit off from the real North Pole. What is going on?

1. The compass is broken and needs a new battery to work again — no support
2. It points to magnetic north, which is in a different place — ← Mova's choice · ✓ the right answer · score 5
3. The North Pole moved there last night — no support
4. Compasses stop working in the cold — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 5, the only option with support. Its support: lesson 17, line 1: «"Thunder? That's just two big clouds bumping their heads, love," says Grandad, the way his own grandad told him. It's a lovely picture, and so are the others:…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «compass needle» (+3); the same action «point» (+2). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · right ✓

"bruh it's cold cos we're further from the sun, obviously" What do you say?

1. Yes, the Earth goes far away every winter — no support
2. Actually we're nearest the Sun in January; it's the slant of the light — ← Mova's choice · ✓ the right answer · score 6
3. No, it's cold because the Moon blocks the Sun — no support
4. Yes, and in summer we touch the Sun — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 6, the only option with support. Its support: lesson 17, line 3: «Winter isn't cold because the Sun is far away: the Earth is actually closest to the Sun in early January! Winter is cold because the Earth is tilted, so the li…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+4); the same place «early january» (+2); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

What would happen to winter if the Earth had no tilt at all?

1. There would be almost no seasons, and days would stay about the same — ✓ the right answer · no support
2. Winter would last all year everywhere — score 4
3. The Earth would stop going round the Sun — ← Mova's choice · score 5
4. Every country would get summer at once twice a year — no support

Why: It took the question to ask what happens next. It chose option 3 with score 5, against 4 for the next best. Its support: lesson 13, line 15: «The Earth goes round the Sun once a year and spins once a day, which makes the Sun seem to move across the sky; Copernicus and Galileo argued for this centurie…», reached through a sentence linked to the one the question matched. What matched: the same doer «earth» (+2); the same place «sun» (+2); the same light verb (be, have, do, get, go) (+1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · wrong ✗

A cartoon shows a hero digging to the middle of the Earth and splashing into a lava lake. What would he really find?

1. A big lava lake, just like the cartoon — ← Mova's choice · score 7
2. A liquid metal outer core, then a solid iron and nickel ball — ✓ the right answer · no support
3. Cold rock all the way through — score 3
4. A hollow cave with a little sun inside — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 7, against 3 for the next best. Its support: lesson 1, line 13: «Spinach is healthy, but it gives no sudden muscles; muscles grow over months with exercise, food and rest, and Popeye is a cartoon that exaggerates on purpose.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «cartoon» (+3); it fills the role the question asks for (+2); the same thing acted on «cartoon» (+1); a different action (counts against) (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · right ✓

Your mate goes, "Shut up, I'm literally looking at the map, Greenland's massive." Best move?

1. Agree with him, maps are always exactly right about sizes — no support
2. Tell him he's stupid — no support
3. Look at a globe together; flat maps stretch the top — ← Mova's choice · ✓ the right answer · score 2
4. Rip the map off the wall — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 2, the only option with support. Its support: lesson 17, line 4: «Flat maps fool us too: you can't peel a ball flat without stretching it, so common maps stretch places near the poles, and Greenland looks enormous when Africa…», reached through the remembered sentence the question matched. What matched: the same action «stretch» (+2); the same doer «common maps» (+2). Against it: a different thing acted on (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

Someone at the park says, "I'm going on holiday to Africa, they speak African there." What's a kind and true reply?

1. Laugh at them in front of everyone — ← Mova's choice · no support
2. No, they all speak English there — no support
3. Yes, everybody there speaks African — no support
4. Which country? Africa has 54, with thousands of languages — ✓ 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 · ★ · wrong ✗

Your kettle is boiling. Just above the spout there's a small clear gap, then a white cloud. What is the white cloud?

1. Smoke coming off the hot metal element inside — ← Mova's choice · no support
2. Pure invisible steam — no support
3. Air turned white by the heat — no support
4. Tiny water drops formed as the steam cools — ✓ 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 8 · ★ · right ✓

You see lightning, then hear thunder a few seconds later. What made the bang?

1. The lightning hitting the ground and echoing back up — score 8
2. Raindrops crashing together in the cloud — no support
3. The clouds bumping together after the flash — score 9
4. The air heated by the lightning expanding suddenly — ← Mova's choice · ✓ the right answer · score 12

Why: It took the question to ask who or what does it. It chose option 4 with score 12, against 9 for the next best. Its support: lesson 17, line 15: «Thunder is the bang made when lightning heats the air extremely fast and the air expands suddenly; clouds do not bump together.», 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 action «expand» (+3); the same doer «air» (+3); the same property (+2). · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · wrong ✗

Grandad tells his clouds-bumping story with a big smile. How do you argue wisely?

1. Tell him he's too old to know science — ← Mova's choice · score 4
2. Refuse to listen to his stories any more — no support
3. Say it's a lovely picture, then share the real reason kindly — ✓ the right answer · no support
4. Pretend to agree with him, and then laugh at him later with friends — no support

Why: It took the question to ask what something is like. It chose option 1 with score 4, the only option with support. Its support: lesson 14, line 5: «And you can enjoy the stories while knowing the science: make a wish on a shooting star, read your horoscope for fun, and still know which is astronomy.», reached through the option's own match among the sentences about the question's things. What matched: the same action «know» (+2); the same thing acted on «science» (+2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

You shine sunlight through a glass of water and look closely at the rainbow patch. What do you see?

1. Exactly seven stripes with dark gaps between — no support
2. Colours blending smoothly into each other — ✓ the right answer · no support
3. Only red and blue, with nothing in between — no support
4. A plain white light with no colours at all — ← Mova's choice · score 0

Why: It took the question to ask what it is done to. It chose option 4 with score 0, the only option with support. Its support: lesson 14, line 11: «The Moon makes no light of its own; it reflects sunlight, and its phases come from how much of its lit half we can see.», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+2); the same thing acted on «light» (+1). Against it: a different action (counts against) (-1); a different doer (counts against) (-2). The right option, 2, 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 cause of lower temperatures during the winter months?

1. The Sun's output of heat diminishes during winter — ← Mova's choice · no support
2. The Moon intercepts a portion of the sunlight — no support
3. The inclination of the Earth's axis causes oblique sunlight and abbreviated days — ✓ the right answer · no support
4. The Earth is then at its greatest distance from the Sun — 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 ✗

Identify the location toward which the needle of a magnetic compass is directed.

1. The geographic North Pole precisely — ← Mova's choice · no support
2. The nearest deposit of iron ore — no support
3. The star known as Polaris — no support
4. The magnetic north pole, which is distinct from the geographic pole — ✓ 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 ✗

It is given that common flat maps of the world represent Greenland as comparable in area to Africa. Select the response consistent with the established facts.

1. The two land masses are of equal area — ← Mova's choice · no support
2. Africa exceeds Greenland in area approximately fourteenfold — ✓ the right answer · no support
3. The areas of the two land masses cannot be determined at present — no support
4. Greenland exceeds Africa in area — 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 the cause of thunder.

1. It results from the collision of clouds — ← Mova's choice · no support
2. It results from the sudden expansion of air heated by lightning — ✓ the right answer · no support
3. It results from the impact of heavy rain upon the surface of the ground — no support
4. It results from wind passing over mountains — 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/myths/17-magnets-compasses-and-big-earth-facts/