Soil
Tests: 6 of 10 right · Exam: 1 of 4 right · Kind: plain · Understood: 4 of 14 · Run: 2026-10-18, commit f3c23ea72
Lesson 56 of the geography 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 ✗
kid at school: "soil's just dead dirt, nothing lives in it lol" — what's true?
- 1. Soil only lives in spring — ← Mova's choice · no support
- 2. A handful of healthy soil has more living things than people on Earth — ✓ the right answer · no support
- 3. Only worms live in soil, nothing else at all, and only a handful of them — no support
- 4. He's right, soil is lifeless — 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 · right ✓
People cut down a rainforest to farm, but after a few years the crops fail. Why?
- 1. The soil was poor; most nutrients were in the trees — ← Mova's choice · ✓ the right answer · no support
- 2. The crops were scared of the jungle — no support
- 3. It rained too little in the rainforest — no support
- 4. Rainforest soil is too rich for crops and burns their roots — 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 · right ✓
A builder digs a deep hole. Which order of layers does he most likely see from top to bottom?
- 1. Topsoil, subsoil, broken rock, bedrock — ← Mova's choice · ✓ the right answer · no support
- 2. Broken rock, topsoil, bedrock, subsoil — no support
- 3. Subsoil, bedrock, topsoil, broken rock — no support
- 4. Bedrock, subsoil, topsoil, broken 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
Test 4 · wrong ✗
What would happen to a lawn if all its earthworms vanished?
- 1. Nothing would change at all — no support
- 2. Soil would turn into rock at once — ← Mova's choice · score 2
- 3. Grass would grow twice as fast with nobody eating its roots underground — score 2
- 4. Soil would get packed and airless, and dead leaves would rot slower — ✓ the right answer · no support
Why: It took the question to ask what happens next. It chose option 2 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 56, line 9: «Earthworms mix soil, make tunnels for air and water, and turn dead leaves into rich soil.», reached through what followed the sentence the question matched. What matched: the same action «turn» (+4). Against it: a different doer (counts against) (-2). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 5 · right ✓
Why was Ukraine called "the breadbasket of Europe"?
- 1. It has no soil, so wheat grows on rock — no support
- 2. Its black chernozem soils are among the most fertile in the world — ← Mova's choice · ✓ the right answer · score 9
- 3. It is covered in rainforest — no support
- 4. It has the most rain in the world — no support
Why: It took the question to ask why something happens (its cause). It chose option 2 with score 9, the only option with support. Its support: lesson 56, line 11: «The black soils of Ukraine and southern Russia, called chernozem, are among the most fertile in the world, which is why Ukraine is called the breadbasket of Eu…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «black soils» (+3); the same property (+3); the same place «world» (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics
Test 6 · right ✓
grandad: "lose the topsoil in a storm, it's back next spring, no worries" — is he right?
- 1. No, soil can never form at all — no support
- 2. No, a few centimetres can take hundreds to a thousand years to form — ← Mova's choice · ✓ the right answer · score 10
- 3. Yes, rain makes new soil in weeks — no support
- 4. Yes, soil grows back every spring once the worms wake up and get going — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 10, the only option with support. Its support: lesson 56, line 4: «Soil grows painfully slowly: a few centimetres can take hundreds to a thousand years. Yet it can be washed or blown away in one bad storm, and about a third of…», reached through the same lesson line as the sentence the question matched. What matched: the same action «take» (+3); the same doer «few centimetres» (+3); the same thing acted on «hundreds» (+2); the same property (+2). · the question and its options parsed, with trees and pragmatics
Test 7 · wrong ✗
Sam's garden soil turns into a puddle that won't drain after rain. What does it probably have too much of?
- 1. Earthworm tunnels — ← Mova's choice · no support
- 2. Clay — ✓ the right answer · no support
- 3. Air spaces — no support
- 4. Rich humus — 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 ✓
Why might protecting soil help fight global warming?
- 1. Soil cools the air like a fridge — no support
- 2. Soil soaks up sunlight and stores it as ice for winter — score 3
- 3. Soils hold more carbon than all plants and the air — ← Mova's choice · ✓ the right answer · score 6
- 4. Soil makes the Sun weaker — no support
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 6, against 3 for the next best. Its support: lesson 56, line 15: «Soils hold more carbon than all the world's plants and the air put together.», reached through the option's own match among the sentences about the question's things. What matched: the same action «hold» (+2); the same doer «soils» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics
Test 9 · right ✓
A farmer's field grows weaker every year. What does she most likely add?
- 1. Fertiliser with nitrogen, phosphorus and potassium — ← Mova's choice · ✓ the right answer · no support
- 2. Sand from the beach only — no support
- 3. Nothing, since soil never runs out — no support
- 4. Pure salt from the sea — 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 · wrong ✗
Which is a way soil gets degraded?
- 1. Rain soaking in slowly — ← Mova's choice · no support
- 2. Leaves falling and rotting on top — no support
- 3. Erosion, salt, pollution or overuse — ✓ the right answer · no support
- 4. Earthworms digging lots of tunnels — 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
Exam question 1 · formal language · wrong ✗
Which of the following statements most accurately characterises the composition of soil?
- 1. A deposit consisting exclusively of decayed vegetation — ← Mova's choice · no support
- 2. A homogeneous substance consisting solely of crushed rock — no support
- 3. A mixture of mineral particles, humus, water, air and living organisms — ✓ the right answer · no support
- 4. A mixture of sand and sea water alone — 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 numerous rainforest soils are deficient in nutrients.
- 1. Rainfall in such regions is wholly insufficient — ← Mova's choice · no support
- 2. Heavy rainfall leaches nutrients, the greater part being retained within vegetation — ✓ the right answer · no support
- 3. Such soils consist entirely of bedrock — no support
- 4. Temperatures are too low for decomposition — 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 · right ✓
Select the response that is consistent with the established facts concerning loam.
- 1. It is a balanced mixture of sand, silt and clay most suitable for agriculture — ← Mova's choice · ✓ the right answer · no support
- 2. It is a soil consisting wholly of clay that does not drain — no support
- 3. It is the bedrock beneath the subsoil — no support
- 4. It is a soil consisting wholly of gravel — 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
Exam question 4 · formal language · wrong ✗
Ascertain the approximate duration required for the formation of a few centimetres of soil.
- 1. A single season of cultivation — ← Mova's choice · no support
- 2. Several million years — no support
- 3. Several days following a period of heavy rainfall — no support
- 4. Several hundred to one thousand years — ✓ 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
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/geography/56-soil/