The shape and size of the Earth, the poles and the equator

Tests: 7 of 13 right · Exam: 1 of 4 right · Kind: plain · Understood: 7 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 7 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 ✗

A traveller flies east and keeps going without turning. What happens?

1. She reaches the North Pole — ← Mova's choice · no support
2. She comes back to where she started — ✓ the right answer · no support
3. She flies away into space — no support
4. She falls off the edge of the Earth — 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 ✗

Which is true?

1. The equator runs from pole to pole — ← Mova's choice · no support
2. The equator runs all the way from the North Pole to the South Pole — no support
3. The equator passes through the North Pole — no support
4. The equator is halfway between the North and South Poles — ✓ the right answer · 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 3 · wrong ✗

Max stands on the beach and watches a sailing ship go away. What does he see last?

1. The bottom of the ship — ← Mova's choice · no support
2. All of it vanishes at once — no support
3. The middle of the ship — no support
4. The top of the mast — ✓ 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 4 · wrong ✗

A country lies on the equator. What weather is most likely there?

1. Very cold winters — ← Mova's choice · no support
2. Ice all year round — no support
3. Warm all year round — ✓ the right answer · no support
4. Snow most of the year — 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 · right ✓

Why do photographs from space show a round Earth?

1. Because space is round — no support
2. Because the Moon is in the way — no support
3. Because cameras make everything round — no support
4. Because the Earth is a ball — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask why something happens (its cause). It chose option 4 with score 5, the only option with support. Its support: lesson 7, line 16: «The Earth's shadow on the Moon is always round, which shows the Earth is a ball.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «earth» (+2); the same thing acted on «ball» (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

A penguin lives near the South Pole. In which hemisphere does it live?

1. The Northern Hemisphere — ← Mova's choice · no support
2. The Southern Hemisphere — ✓ the right answer · no support
3. In both at once — no support
4. On the equator — 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 ✗

If you could walk around the equator at about 30 kilometres a day, how long would it take?

1. About thirty long years — ← Mova's choice · no support
2. About one month of walking — no support
3. More than three years — ✓ the right answer · no support
4. About one week if you hurry — 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 ✓

Which shows best that the Earth is round?

1. The Sun is hot at noon — no support
2. Its shadow on the Moon is always round — ← Mova's choice · ✓ the right answer · score 13
3. Rivers always flow downhill towards the sea — no support
4. The sky is blue — score 5

Why: It took the question to ask who or what does it. It chose option 2 with score 13, against 5 for the next best. Its support: lesson 7, line 16: «The Earth's shadow on the Moon is always round, which shows the Earth is a ball.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+5); the same doer «earth» (+4); the same action «shadow» (+2); the same place «moon» (+2). · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

Where would you come out if you drilled from the North Pole straight through the Earth's centre?

1. You would come out at the equator — no support
2. You would come out in Australia — score 6
3. You would come out at the South Pole — ← Mova's choice · ✓ the right answer · score 8
4. You would come out in Africa — no support

Why: It took the question to ask where. It chose option 3 with score 8, against 6 for the next best. Its support: lesson 7, line 6: «The Earth is shaped like a ball, very slightly flattened at the poles.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same place «poles» (+4). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 10 · right ✓

how far round the world is it roughly

1. About 40 thousand kilometres — ← Mova's choice · ✓ the right answer · no support
2. About 4 thousand kilometres — no support
3. About 12 thousand kilometres — no support
4. About 400 thousand kilometres — 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 · right ✓

wots the equator again

1. An imaginary line round the middle, halfway between the poles — ← Mova's choice · ✓ the right answer · score 3
2. The line you'd draw from the North Pole down to the South Pole — no support
3. The edge of the world where the sea ends — no support
4. A real painted line you can stand on — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 7, line 10: «The equator is an imaginary line around the Earth, halfway between the poles.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «imaginary line» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 12 · right ✓

a video said the Earth is flat and ships just get too small to see. true?

1. No, ships sink down a little as they sail away — score 10
2. Yes, ships just shrink until you can't see them — no support
3. Yes, the sea is flat so ships only get smaller — no support
4. No, ships vanish from the bottom up because the Earth curves — ← Mova's choice · ✓ the right answer · score 12

Why: It took the question to ask which statement is true. It chose option 4 with score 12, against 10 for the next best. Its support: lesson 7, line 15: «A ship sailing away disappears from the bottom up because the Earth's surface curves.», reached through the remembered sentence the question matched. What matched: the same action «disappear» (+4); the same doer «ship» (+4); the same place «bottom» (+4). · the question and its options parsed, with trees and pragmatics

Test 13 · right ✓

Leo says the South Pole is in the middle of a frozen ocean. right?

1. Yes, and it's the North Pole that sits on land, a big frozen continent — score 8
2. Yes, both poles are frozen oceans — no support
3. No, that's the North Pole; the South Pole is on Antarctica's land — ← Mova's choice · ✓ the right answer · score 10
4. No, the South Pole is on a warm island — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 10, against 8 for the next best. Its support: lesson 7, line 14: «The North Pole is in the middle of a frozen ocean, and the South Pole is on the icy land of Antarctica.», reached through the remembered sentence the question matched. What matched: the same doer «north pole» (+4); the same place «middle» (+4); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Which of the following statements most accurately characterises the figure of the Earth?

1. A sphere slightly flattened at the poles — ← Mova's choice · ✓ the right answer · score 5
2. A perfectly flat disc — no support
3. A cube with rounded edges — no support
4. A sphere elongated at the poles — no support

Why: It took the question to ask who or what does it. It chose option 1 with score 5, the only option with support. Its support: lesson 7, line 6: «The Earth is shaped like a ball, very slightly flattened at the poles.», reached through a sentence linked to the one the question matched. What matched: the same action «flatten» (+2); the same place «poles» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

State the approximate circumference of the Earth measured at the equator.

1. Twelve thousand seven hundred kilometres — ← Mova's choice · no support
2. Four hundred thousand kilometres — no support
3. Forty thousand kilometres — ✓ the right answer · no support
4. Four thousand kilometres — 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 ✗

State the approximate proportion of the Earth's surface covered by water.

1. Three tenths — ← Mova's choice · no support
2. One half — no support
3. Seven tenths — ✓ the right answer · no support
4. Nine tenths — 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 ✗

Identify which of the following observations constitutes evidence that the surface of the Earth is curved.

1. A departing vessel remains visible indefinitely — ← Mova's choice · no support
2. A departing vessel diminishes uniformly until invisible — no support
3. A departing vessel vanishes from the mast downward — no support
4. A departing vessel vanishes from the hull upward — ✓ 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/7-shape-and-size-of-the-earth/