Volcanoes and earthquakes up close

Tests: 7 of 13 right · Exam: 0 of 4 right · Kind: ★ · Understood: 10 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 62 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 ✓

Japan, Indonesia and Chile all have many earthquakes. What do they share?

1. They all lie far from any ocean — score 8
2. They lie on the Ring of Fire where plates meet — ← Mova's choice · ✓ the right answer · score 10
3. They all have very large deserts — no support
4. They are all in the hottest part of the world, near the equator — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 10, against 8 for the next best. Its support: lesson 62, line 8: «The Ring of Fire is a belt of many volcanoes and earthquakes around the Pacific Ocean; Japan, Indonesia and Chile lie on it.», reached through the remembered sentence the question matched. What matched: the same action «lie» (+4); the same place «ring» (+4); the same doer «japan» (+2). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

Lava in Hawaii flows like a slow red river, but Mount St Helens blew its top off. Why the difference?

1. The other volcano had water instead of lava — no support
2. Hawaii's lava is runny and lets gas escape; the other magma was sticky and trapped it — ✓ the right answer · score 4
3. Hawaii's lava is cold and the other was hot — ← Mova's choice · score 5
4. Hawaii's volcano is much smaller and weaker — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 5, against 4 for the next best. Its support: lesson 12, line 13: «Lava from a volcano is rock so hot that it has melted into a liquid; when it cools it freezes back into solid rock.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «lava» (+2); the same property (+2); the same light verb (be, have, do, get, go) (+1). The right option, 2, scored 4. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

Which is true about predicting earthquakes?

1. Scientists can tell the exact hour weeks ahead of every quake — ← Mova's choice · no support
2. Scientists know where they are likely, but not the exact day — ✓ the right answer · no support
3. Earthquakes come only at night, so they are very easy to predict — no support
4. Animals always warn us a day before, so we can simply watch them — 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 ✓

Two towns are hit by the same strong earthquake. In one, buildings are made to bend and sway; in the other, they are stiff brick. Which suffers less?

1. Neither, because earthquakes do not harm buildings — no support
2. Both suffer exactly the same — no support
3. The town with buildings made to bend and sway — ← Mova's choice · ✓ the right answer · score 8
4. The town with stiff brick buildings — no support

Why: It took the question to ask who or what does it. It chose option 3 with score 8, the only option with support. Its support: lesson 62, line 18: «Buildings made to bend and sway a little stand up to earthquakes better than stiff brick ones.», reached through the remembered sentence the question matched. What matched: the same action «make» (+4); the same thing acted on «buildings» (+4). · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · wrong ✗

Why did the people of Pompeii have so little warning?

1. Volcanoes in Roman times erupted without any ash — ← Mova's choice · no support
2. The volcano had been quiet for so long that they did not know it was dangerous — ✓ the right answer · no support
3. The eruption happened under the sea — no support
4. The volcano was hidden behind clouds — 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 6 · ★ · right ✓

A ship far out in the deep ocean hardly notices a tsunami passing under it. Why does the same wave become huge at the coast?

1. In shallow water the wave slows down and piles up higher — ← Mova's choice · ✓ the right answer · score 2
2. The wave turns round at the shore and doubles itself in size — no support
3. The water near the coast is saltier and heavier, so it rises — no support
4. The wind grows stronger near the coast and pushes it higher — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 2, the only option with support. Its support: lesson 62, line 20: «Out in the deep ocean a tsunami is low, but in shallow water near the coast it slows down and piles up into a huge wave.», reached through the option's own match among the sentences about the question's things. What matched: the same action «slow down» (+2); the same place «shallow water» (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · right ✓

If the mantle stopped flowing, what would happen to the plates?

1. They would sink into the hot core at once and melt away — no support
2. They would float up into space — no support
3. They would stop moving, so mountains would stop rising — ← Mova's choice · ✓ the right answer · score 3
4. They would move faster than before — score 3

Why: It took the question to ask which statement is true. It chose option 3 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 43, line 6: «The Earth's outer shell is broken into huge plates that move very slowly.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «huge plates» (+2); the same action «move» (+1). · the question and its options parsed, with trees and pragmatics

Test 8 · ★ · wrong ✗

What would you find right on the epicentre of an earthquake?

1. The hole the lava comes out of — no support
2. The point of the surface directly above where the rocks slipped — ✓ the right answer · no support
3. The edge where the shaking stops — no support
4. The deepest point of the fault, where the rocks first start to slip — ← Mova's choice · score 7

Why: It took the question to ask what it is done to. It chose option 4 with score 7, the only option with support. Its support: lesson 62, line 4: «In an earthquake, rocks on both sides of a crack called a fault are pushed for years, bend a little, and then suddenly slip; the energy spreads out as waves th…», 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 thing acted on «fault» (+3). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · wrong ✗

A mountain has no record of ever erupting and its crater is worn away and covered by forest. Which word fits it best?

1. Erupting — ← Mova's choice · no support
2. About to erupt — no support
3. Active — no support
4. Extinct — ✓ 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 · ★ · right ✓

why do so many farms sit right next to volcanoes, isnt that dumb

1. Lava scares away the insects and pests that eat the crops — no support
2. Volcanoes bring extra rain to all the fields nearby — no support
3. Volcanoes keep the fields warm all through the cold winter — no support
4. Volcanic ash breaks down into very rich, fertile soil — ← Mova's choice · ✓ the right answer · score 7

Why: It took the question to ask which statement is true. It chose option 4 with score 7, the only option with support. Its support: lesson 62, line 16: «Volcanic ash breaks down into very fertile soil, so many farms lie near volcanoes.», reached through a sentence linked to the one the question matched. What matched: the same action «break down» (+3); the same doer «volcanic ash» (+2); the same place «fertile soil» (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · right ✓

so what even is the epicentre of a quake

1. The place where the quake does the most damage — no support
2. The deepest point where the quake starts underground — no support
3. The middle of the plate where the quake ends — no support
4. The point on the surface right above where the quake starts — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask which statement is true. It chose option 4 with score 5, the only option with support. Its support: lesson 62, line 4: «In an earthquake, rocks on both sides of a crack called a fault are pushed for years, bend a little, and then suddenly slip; the energy spreads out as waves th…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «point» (+4); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 12 · ★ · wrong ✗

Mia says scientists can tell the exact day an earthquake will hit. true?

1. No, scientists cannot measure earthquakes at all — ← Mova's choice · score 1
2. Yes, seismometers can warn of every single quake at least a week ahead — no support
3. No, nobody can yet predict the exact day, so strong buildings matter — ✓ the right answer · no support
4. Yes, but only for quakes that happen under the sea — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 1, the only option with support. Its support: lesson 62, line 14: «Scientists measure earthquakes with instruments called seismometers.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «scientists» (+2); the same action «measure» (+1); the same thing acted on «earthquakes» (+1). Against it: one says «not», the other does not (counts against) (-3). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 13 · ★ · right ✓

a video said magma comes up cos the volcano sucks it out. right?

1. No, magma rises because the Sun heats the ground — score 5
2. Yes, the volcano pulls magma up like a straw — no support
3. No, magma rises because it is lighter than the solid rock around it — ← Mova's choice · ✓ the right answer · score 9
4. Yes, the wind over the top draws the magma up — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 9, against 5 for the next best. Its support: lesson 62, line 9: «Magma rises because it is lighter than the solid rock around it.», reached through the remembered sentence the question matched. What matched: its «because» matches the remembered cause (+4); the same action «rise» (+3); the same doer «magma» (+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 the location of the majority of volcanoes and earthquakes?

1. They occur chiefly near the North and South Poles — ← Mova's choice · no support
2. They occur with equal frequency in all places on Earth — no support
3. They occur chiefly where the Earth's plates meet — ✓ the right answer · no support
4. They occur chiefly in the centres of the largest plates — 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 principal reason for which certain eruptions are of an explosive character.

1. The volcano is wholly extinct — ← Mova's choice · no support
2. The lava is exceptionally runny — no support
3. Gas is trapped within sticky magma — ✓ the right answer · no support
4. The magma is heavier than the surrounding rock — 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 ✗

Select the response that is consistent with the established facts concerning the designation epicentre.

1. The instrument by which earthquakes are measured — ← Mova's choice · no support
2. The crater at the summit of a volcano — no support
3. The point deep underground at which an earthquake begins — no support
4. The point upon the surface directly above the origin of an earthquake — ✓ 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 4 · formal language · wrong ✗

Ascertain the cause by which a tsunami is most usually occasioned.

1. The pull of the Moon upon the tides — ← Mova's choice · no support
2. Heavy rainfall upon the coast — no support
3. A strong wind over the ocean — no support
4. An earthquake beneath the sea — ✓ 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/62-volcanoes-and-earthquakes/