Clouds, rain, snow and hail
Tests: 4 of 13 right · Exam: 2 of 4 right · Kind: ★ · Understood: 7 of 17 · Run: 2026-10-18, commit f3c23ea72
Lesson 67 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 ✗
On a hot summer afternoon, a huge cloud grows tall like a tower and dark below. What should you expect?
- 1. A light drizzle that lasts all week without stopping — ← Mova's choice · no support
- 2. Snow falling all evening — no support
- 3. A calm clear night with frost — no support
- 4. A thunderstorm with heavy rain and perhaps hail — ✓ 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 ✗
You breathe on a cold window and it turns misty. What is like this in nature?
- 1. Hail growing in a storm cloud — ← Mova's choice · no support
- 2. Dew forming on cold grass at night — ✓ the right answer · no support
- 3. Wind blowing over the sea — no support
- 4. Lava cooling into 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 3 · ★ · right ✓
Why can hail fall even in hot summer?
- 1. Thunderstorm clouds reach so high that their tops are far below freezing — ← Mova's choice · ✓ the right answer · no support
- 2. The Sun makes ice in the clouds — no support
- 3. Summer air near the ground is below freezing — no support
- 4. Hail is made on the ground and blown upward — 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 4 · ★ · right ✓
After a clear calm night, the grass is white with ice, but after a cloudy night it is only wet. Why?
- 1. Without clouds the ground lost more heat and fell below freezing — ← Mova's choice · ✓ the right answer · no support
- 2. The Moon freezes the grass on clear nights when there is no cloud to hide it — no support
- 3. Clouds bring ice to the grass — no support
- 4. Cloudy nights are always colder — 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 · ★ · wrong ✗
Which is true about a snowflake?
- 1. It is a piece of cloud that fell to the ground in one piece — no support
- 2. It is a frozen raindrop that is perfectly round like a ball — no support
- 3. It is made of ice crystals with six sides or arms — ✓ the right answer · no support
- 4. It always has four arms, just like a cross or a plus sign — ← Mova's choice · score 4
Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 67, line 13: «Snowflakes have six sides or six arms.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «snowflakes» (+2); the same thing acted on «six sides» (+1); the same light verb (be, have, do, get, go) (+1). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 6 · ★ · wrong ✗
A climber high on a mountain walks into mist that hides everything. Where is he?
- 1. Above the sky — ← Mova's choice · no support
- 2. Inside a cloud of smoke — no support
- 3. Under a rainbow — no support
- 4. Inside a cloud — ✓ 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 · ★ · right ✓
Why does a cut-open hailstone look like an onion?
- 1. It grew roots like a plant in the cloud — score 0
- 2. It went up and down in the storm many times, adding a layer each time — ← Mova's choice · ✓ the right answer · score 1
- 3. It was made by many hailstones packed together on the ground — no support
- 4. It was dyed by different colours of rain — no support
Why: It took the question to ask why something happens (its cause). It chose option 2 with score 1, against 0 for the next best. Its support: lesson 67, line 4: «Hail is made only in tall thunderstorm clouds: strong winds inside carry a frozen drop up and down again and again, and each trip adds a new layer of ice, like…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «new layer» (+2); the same action «add» (+1). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · wrong ✗
A pupil puts a straight-sided jar outside and finds 12 millimetres of water in it after one day. What has he made?
- 1. A simple thermometer — ← Mova's choice · no support
- 2. A simple barometer — no support
- 3. A simple rain gauge — ✓ the right answer · no support
- 4. A simple wind vane — 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 9 · ★ · wrong ✗
Snow falls high up, but it reaches the ground as rain. What does this tell you?
- 1. The cloud was too low to snow — no support
- 2. The ground was much colder than the cloud above it — ← Mova's choice · score 4
- 3. The snow was never made of ice — score 4
- 4. The air near the ground was warmer than freezing — ✓ the right answer · no support
Why: It took the question to ask what it is done to. It chose option 2 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 16, line 2: «Near the equator the Sun's rays strike the ground most directly, so it is hot all year; near the poles the rays come in at a low slant and spread their heat th…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «ground» (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · right ✓
why's fog so thick in the mornings, what even is it
- 1. Steam that rises up from the warm ground — no support
- 2. Smoke that has blown in from far away — no support
- 3. Dust that is lifted by the morning wind — no support
- 4. A cloud that has formed at ground level — ← 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, the only option with support. Its support: lesson 67, line 12: «Fog is a cloud that forms at ground level.», reached through the same lesson line as the sentence the question matched. What matched: the same action «form» (+4); the same doer «cloud» (+4); the same thing acted on «cloud» (+2); the same place «ground level» (+2). · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · wrong ✗
big tall dark clouds coming, what's that gonna be
- 1. A cumulonimbus storm cloud with heavy rain, maybe thunder and hail — ✓ the right answer · no support
- 2. A cirrus cloud bringing fine weather — score 2
- 3. A stratus cloud bringing a light breeze — score 2
- 4. A cumulus cloud bringing a clear sunny day — ← Mova's choice · score 3
Why: It took the question to ask which statement is true. It chose option 4 with score 3, against 2 for the next best. Its support: lesson 67, line 11: «Cumulonimbus clouds are tall storm clouds that bring heavy rain, thunder and hail.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «tall storm clouds» (+2); the same action «bring» (+1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 12 · ★ · wrong ✗
Leo says clouds are made of water vapour like steam. true?
- 1. No, clouds are made of smoke and dust — ← Mova's choice · score 4
- 2. No, clouds are tiny water droplets or ice crystals — ✓ the right answer · no support
- 3. Yes, clouds are steam rising off the sea — no support
- 4. Yes, clouds are pure water vapour floating high up in the sky — score 4
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 14, line 3: «As the moist air rises it cools, and the vapour condenses on tiny specks of dust, smoke and sea salt into droplets that make clouds.», reached through the remembered sentence the question matched. What matched: the same action «make» (+3); the same thing acted on «clouds» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 13 · ★ · wrong ✗
my brother said hail is just frozen rain falling once. right?
- 1. No, hail is ice that falls from high cirrus clouds — no support
- 2. Yes, hail is rain that froze on the way down — ← Mova's choice · score 3
- 3. No, hail gets ice layers as winds carry it up and down in a storm cloud — ✓ the right answer · score 2
- 4. Yes, hail is snow that was squeezed into balls — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 3, against 2 for the next best. Its support: lesson 67, line 2: «Clouds have names by their shape and height: cumulus are white puffy heaps of fair weather; stratus are flat grey sheets that may bring drizzle; cirrus are thi…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «towering storm cloud» (+2); the same thing acted on «heavy rain» (+1). The right option, 3, scored 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 composition of clouds?
- 1. Smoke rising from fires and big factories — ← Mova's choice · no support
- 2. Invisible water vapour and nothing else — no support
- 3. Dust raised high into the sky by the wind — no support
- 4. Tiny water droplets or ice crystals — ✓ 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 · wrong ✗
Identify the type of cloud which brings heavy rain, thunder and hail.
- 1. Cirrus — ← Mova's choice · no support
- 2. Cumulus — no support
- 3. Cumulonimbus — ✓ the right answer · no support
- 4. Stratus — 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 fog.
- 1. It is a cloud formed at ground level — ← Mova's choice · ✓ the right answer · no support
- 2. It is smoke trapped near the ground — no support
- 3. It is frost which has melted — no support
- 4. It is rain falling very slowly through cold air — 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 · right ✓
It is given that water vapour condenses upon a surface whose temperature is below freezing. Ascertain the designation of the deposit so formed.
- 1. Frost — ← Mova's choice · ✓ the right answer · no support
- 2. Hail — no support
- 3. Dew — no support
- 4. Sleet — 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/67-clouds-rain-snow-hail/