Eclipses

Tests: 5 of 13 right · Exam: 1 of 4 right · Kind: ★★ · Understood: 10 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 8 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 ✗

Kai holds a ball between a lamp and a globe. What is he showing?

1. A full moon — ← Mova's choice · no support
2. The seasons — no support
3. A lunar eclipse — no support
4. A solar eclipse — ✓ 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 ✗

Tonight there is a half moon. Which is true?

1. A lunar eclipse could happen tonight — ← Mova's choice · no support
2. A solar eclipse could happen tonight — no support
3. No eclipse can happen tonight — ✓ the right answer · no support
4. Both eclipses could happen tonight — 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 · ★★ · right ✓

If the Moon were twice as far away, how would solar eclipses change?

1. They would happen every month — score 6
2. They would be seen from the whole Earth — score 4
3. The Moon would cover the Sun for much longer — score 6
4. The Moon would look too small to cover the whole Sun — ← Mova's choice · ✓ the right answer · score 8

Why: It took the question to ask what something is like. It chose option 4 with score 8, against 6 for the next best. Its support: lesson 8, line 13: «During a total lunar eclipse the Moon often looks red, because a little sunlight is bent through the Earth's air onto it.», reached through the remembered sentence the question matched. What matched: the same action «look» (+4); the same doer «moon» (+4). · the question and its options parsed, with trees and pragmatics

Test 4 · ★★ · right ✓

In one town the Sun goes dark for a few minutes, while a city 2 thousand kilometres away sees nothing special. What is happening?

1. A sunset — no support
2. A solar eclipse — ← Mova's choice · ✓ the right answer · score 6
3. A lunar eclipse — score 6
4. A new moon — score 6

Why: It took the question to ask which statement is true. It chose option 2 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 8, line 9: «A solar eclipse can happen only at new moon.», reached through the remembered sentence the question matched. What matched: the same doer «solar eclipse» (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics

Test 5 · ★★ · wrong ✗

Astronauts on the Moon look at the Earth during a lunar eclipse. What do they see?

1. The Earth hiding the Sun, with a red ring of light around it — ✓ the right answer · no support
2. The Moon's dark round shadow sliding slowly across the Earth below — ← Mova's choice · score 4
3. Nothing unusual at all — no support
4. A full Earth shining brightly — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 4, the only option with support. Its support: lesson 8, line 1: «An eclipse happens when the Sun, the Earth and the Moon stand in one straight line, so that one of them casts its shadow on another.», reached through the option's own match among the sentences about the question's things. What matched: the same action «shadow» (+2); the same doer «eclipse» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 6 · ★★ · wrong ✗

A friend wants to watch a solar eclipse through dark sunglasses. What should you tell him?

1. They are safe because the Moon blocks the heat — ← Mova's choice · no support
2. They are safe if he looks only quickly — no support
3. They are safe if the glasses are very dark — no support
4. They are not safe; only special eclipse glasses are — ✓ 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 ✗

Which is true about the shadow in a lunar eclipse?

1. It is a thin straight line across the Moon — score 8
2. It is round, because the Earth is a ball — ✓ the right answer · score 8
3. It is the shadow of the Sun falling on the Moon — ← Mova's choice · score 12
4. It is square, because of the shapes of the continents — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 12, against 8 for the next best. Its support: lesson 8, line 3: «In a lunar eclipse the Earth passes between the Sun and the Moon and the Earth's shadow falls on the Moon: the Moon goes dim and often turns coppery red, and e…», reached through the remembered sentence the question matched. What matched: the same action «fall» (+4); the same doer «shadow» (+4); the same place «moon» (+4). The right option, 2, scored 8. · the question and its options parsed, with trees and pragmatics

Test 8 · ★★ · wrong ✗

Why does a lunar eclipse last much longer than a total solar eclipse in one place?

1. A lunar eclipse happens in winter only — ← Mova's choice · score 5
2. The Earth's big shadow takes long to cross the small Moon — ✓ the right answer · score 5
3. The Sun goes behind the Earth for the night — no support
4. The Moon moves faster during a lunar eclipse — no support

Why: It took the question to ask why something happens (its cause). 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 8, line 10: «A lunar eclipse can happen only at full moon.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «lunar eclipse» (+3); the same action «happen» (+2). The right option, 2, scored 5. · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · right ✓

If the Moon's path were not tilted at all, what would happen?

1. There would be eclipses every month — ← Mova's choice · ✓ the right answer · score 8
2. The Moon would stop going around the Earth — score 4
3. There would be no eclipses ever — score 6
4. The Moon would have no phases — score 4

Why: It took the question to ask what happens next. It chose option 1 with score 8, against 6 for the next best. Its support: lesson 8, line 5: «There is no eclipse every month because the Moon's path is tilted a little, so usually it passes just above or below the line between the Sun and the Earth.», reached through what followed the sentence the question matched. What matched: the same doer «eclipse» (+4); the same property (+2); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★★ · right ✓

wot's a solar eclipse then

1. The Moon gets between the Sun and the Earth — ← Mova's choice · ✓ the right answer · score 4
2. The Sun switches off for a few minutes — no support
3. The Earth gets between the Sun and the Moon — score 4
4. The Sun goes behind a big cloud — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 3, line 3: «When the Moon is between the Earth and the Sun, its lit half faces away from us and we see a new moon; when the Moon is on the far side of the Earth from the S…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «moon» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · ★★ · wrong ✗

can i look at the eclipse tmrw with my sunnies

1. Yes, dark sunglasses are enough — ← Mova's choice · no support
2. Yes, the Moon blocks all the harmful light, so sunnies are fine — no support
3. No, only special eclipse glasses are safe for a solar eclipse — ✓ the right answer · no support
4. Yes, if you only look for a minute — 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 12 · ★★ · wrong ✗

my sister says we get a solar eclipse every new moon. true?

1. No, the Moon's path is tilted so it usually misses the line — ✓ the right answer · no support
2. Yes, every single new moon makes one — no support
3. Yes, but only when it's cloudy — no support
4. No, solar eclipses happen at full moon — ← Mova's choice · score 6

Why: It took the question to ask which statement is true. It chose option 4 with score 6, the only option with support. Its support: lesson 8, line 10: «A lunar eclipse can happen only at full moon.», reached through the option's own match among the sentences about the question's things. What matched: the same action «happen» (+2); the same doer «lunar eclipse» (+2); the same place «full moon» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 13 · ★★ · right ✓

Tom reckons the Moon goes red in a lunar eclipse cos it gets hot. right?

1. Yes, it glows red like hot metal — score 4
2. No, a little sunlight bends through Earth's air onto it — ← Mova's choice · ✓ the right answer · score 6
3. No, it's red because of rusty dust that covers it all over — score 6
4. Yes, the Moon heats up in the Earth's shadow — score 4

Why: It took the question to ask which statement is true. It chose option 2 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 8, line 13: «During a total lunar eclipse the Moon often looks red, because a little sunlight is bent through the Earth's air onto it.», reached through a sentence linked to the one the question matched. What matched: the same action «bend» (+2); the same place «air» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Which of the following statements most accurately characterises a solar eclipse?

1. A cloud is interposed between the Sun and the Earth — ← Mova's choice · no support
2. The Sun is interposed between the Earth and the Moon — no support
3. The Earth is interposed between the Sun and the Moon — no support
4. The Moon is interposed between the Sun and the Earth — ✓ 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 · right ✓

State the lunar phase at which, and at which alone, a lunar eclipse may occur.

1. Full moon — ← Mova's choice · ✓ the right answer · score 6
2. New moon — score 6
3. Last quarter — no support
4. First quarter — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 8, line 10: «A lunar eclipse can happen only at full moon.», reached through the remembered sentence the question matched. What matched: the same doer «lunar eclipse» (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Identify the principal reason for which eclipses do not occur in every month.

1. The Earth's atmosphere conceals them from view — ← Mova's choice · no support
2. The orbit of the Moon is slightly inclined — ✓ the right answer · no support
3. The Moon moves too rapidly to come into alignment — no support
4. The Sun is too large to be obscured by the Moon — 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 safe observation of eclipses.

1. Both may be observed safely with the naked eye — ← Mova's choice · no support
2. A lunar eclipse requires special glasses; a solar eclipse does not — no support
3. Neither may be observed safely by any means — no support
4. A solar eclipse requires special eclipse glasses; a lunar eclipse does not — ✓ 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/8-eclipses/