Weather signs and the 30-30 rule

Tests: 9 of 19 right · Exam: 1 of 4 right · Kind: ★ · Understood: 17 of 23 · Run: 2026-10-18, commit f3c23ea72

Lesson 15 of the everyday 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 ✓

At a picnic in Colorado, Ella counts 15 seconds from a flash to the thunder. Which is true?

1. The lightning is about 5 km away, so they should go inside — ← Mova's choice · ✓ the right answer · score 7
2. They should wait until it is closer before moving — no support
3. The storm is too far away to be any danger to them at all yet — no support
4. They are safe if they stay under a big tree — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 7, the only option with support. Its support: lesson 15, line 3: «Light reaches you almost instantly, but sound travels only about 1 kilometre in 3 seconds (about 1 mile in 5 seconds), so counting from flash to bang tells you…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «lightning» (+4); the same property (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

Why should a family caught in lightning stay inside their car?

1. Lightning cannot hit cars — ← Mova's choice · score 3
2. Its tyres keep them off the ground — no support
3. Its metal body shields them — ✓ the right answer · no support
4. Lightning bounces off heavy things — score 1

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 3, against 1 for the next best. Its support: lesson 15, line 5: «Example: on a beach in Florida, a boy counts 12 seconds from flash to bang — the lightning is about 4 kilometres away, close enough to strike, so his family le…», reached through the cause of the sentence the question matched. What matched: the same action «strike» (+4); the same doer «lightning» (+4). Against it: one says «not», the other does not (counts against) (-5). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · right ✓

If sound travelled as fast as light, what would you notice in a storm?

1. No thunder at all — no support
2. Lightning lasting for minutes — no support
3. Thunder and lightning at the same moment — ← Mova's choice · ✓ the right answer · score 4
4. Thunder arriving long before the lightning flash — no support

Why: It took the question to ask what it is done to. It chose option 3 with score 4, the only option with support. Its support: lesson 15, line 11: «Light travels so fast that you see lightning almost the moment it happens.», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+3); the same thing acted on «lightning» (+2). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · right ✓

The last thunder was 10 minutes ago and the sun is coming out. Can you go swimming now?

1. Not yet; wait until 30 minutes after the last thunder — ← Mova's choice · ✓ the right answer · score 3
2. Yes, as long as you swim quickly — no support
3. Yes, but only in the shallow end — no support
4. Yes, because the sun has come out and the storm is over — 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 15, line 4: «The 30-30 rule: if thunder comes 30 seconds or less after the flash, go inside now, and wait 30 minutes after the last thunder before going out. Today experts…», reached through the same lesson line as the sentence the question matched. What matched: the same action «wait» (+3); the same property (+2); the same circumstance (+2). Against it: a different doer (counts against) (-1); one says «not», the other does not (counts against) (-3). · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · wrong ✗

On a hike with no buildings near, a storm is overhead. Which is the safest choice?

1. Stand still in the middle of an open field — ← Mova's choice · no support
2. Shelter under the tallest tree you can find — no support
3. Get off high ground and away from tall lone trees — ✓ the right answer · no support
4. Climb to the top of the hill to watch the storm — 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 6 · ★ · wrong ✗

Which is NOT a sign of a coming thunderstorm?

1. A sudden cool gust of wind — ← Mova's choice · score 3
2. Small white fluffy clouds on a calm day — ✓ the right answer · no support
3. Tall dark clouds building up fast in the afternoon — no support
4. Distant rumbles of thunder — 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 15, line 9: «A sudden cool gust of wind often comes just before a thunderstorm arrives.», reached through the remembered sentence the question matched. What matched: the same doer «sudden cool gust» (+2); the same property (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

Thunder comes 3 seconds after a flash. What does this mean?

1. The lightning struck about 3 km away — ← Mova's choice · no support
2. The lightning struck about 1 km away — ✓ the right answer · no support
3. The storm is very far away — no support
4. The storm has already ended — 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 do storm experts say «When thunder roars, go indoors»?

1. Thunder itself is loud enough to hurt your ears badly — no support
2. Thunder shows the storm is moving away — no support
3. If you can hear thunder, lightning can reach you — ← Mova's choice · ✓ the right answer · score 4
4. Thunder means that the rain will stop — score 4

Why: It took the question to ask why something happens (its cause). It chose option 3 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 12, line 16: «If you can hear thunder, you are close enough to be struck by lightning, so get out of the water and go inside a building.», reached through the option's own match among the sentences about the question's things. What matched: the same action «hear» (+2); the same thing acted on «thunder» (+2). · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · wrong ✗

A boy in Texas wants to ride his bike through a flooded underpass. What is the right advice?

1. Push the bike through slowly instead — ← Mova's choice · score 6
2. Ride through if he can see the bottom — score 0
3. Turn around, because the water may be deep and fast — ✓ the right answer · no support
4. Ride fast so the water cannot stop him — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 6, against 0 for the next best. Its support: lesson 5, line 6: «A boy in Florida rode his bike without a helmet down a hill; he hit a crack in the path, flew over the handlebars and hurt his head so badly he needed hospital…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same thing acted on «bike» (+4). Against it: a different action (counts against) (-2); a different doer (counts against) (-2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

flash then counted 9 secs till thunder, how far

1. About 9 km away — ← Mova's choice · no support
2. About 3 km, or about 2 miles — ✓ the right answer · no support
3. About 30 km away — no support
4. Right overhead — 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 · ★ · wrong ✗

thunder 20 secs after the flash, keep playing footy?

1. Yes, until the rain starts — ← Mova's choice · no support
2. No, go inside, it's under 30 seconds — ✓ the right answer · no support
3. Yes, if you stay low — no support
4. Yes, it's still far away — 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 · ★ · right ✓

storm, can we hide under that big tree

1. Yes, if you hug the trunk — no support
2. Yes, if it's the tallest one — no support
3. Yes, trees keep you dry and safe — no support
4. No, lightning often hits tall trees — ← 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 15, line 19: «Lightning can strike more than 10 miles (about 16 kilometres) away from the storm that makes it, even where it is still sunny.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «lightning» (+4); the same action «strike» (+3). · the question and its options parsed, with trees and pragmatics

Test 13 · ★ · right ✓

last thunder 10 mins ago, back outside?

1. Wait until 30 minutes after the last thunder — ← Mova's choice · ✓ the right answer · score 7
2. Yes, once you see blue sky — no support
3. Yes, 10 minutes is long enough, the storm is over now — no support
4. Yes, as soon as the rain stops — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 7, the only option with support. Its support: lesson 15, line 14: «Wait 30 minutes after the last thunder before going back outside.», reached through the remembered sentence the question matched. What matched: the same circumstance (+4); the same action «wait» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 14 · ★ · right ✓

heard thunder but it's still sunny, can we keep playing

1. Yes, if you stay under a tree — no support
2. No, go indoors, lightning can strike far from the storm — ← Mova's choice · ✓ the right answer · score 7
3. Yes, keep playing until it actually starts to rain properly — no support
4. Yes, sunny means it is safe — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 7, the only option with support. Its support: lesson 12, line 16: «If you can hear thunder, you are close enough to be struck by lightning, so get out of the water and go inside a building.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «lightning» (+4); the same action «strike» (+3). · the question and its options parsed, with trees and pragmatics

Test 15 · ★ · wrong ✗

storm's coming, nearest shelter is a big tree

1. Get into a building or a car, not under the tree — ✓ the right answer · no support
2. Climb the tree to be safe — no support
3. Lie on the grass next to the tree — no support
4. Stand under the tree, it is tall — ← 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 15, line 15: «A tall lone tree is a dangerous place to shelter, because lightning often strikes tall objects.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «tall lone tree» (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 16 · ★ · wrong ✗

Mia says lightning never hits the same place twice. right?

1. No, it can and often does — ✓ the right answer · no support
2. Yes, the ground stops it coming back — no support
3. Yes, it always moves somewhere new — ← Mova's choice · score 4
4. Yes, unless there is metal — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 4, the only option with support. Its support: lesson 12, line 16: «If you can hear thunder, you are close enough to be struck by lightning, so get out of the water and go inside a building.», reached through the remembered sentence the question matched. What matched: the same action «strike» (+2); the same doer «lightning» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 17 · ★ · wrong ✗

my cousin's mate got struck by lightning sheltering under a tree and his trainers melted to his feet

1. Real lesson: rubber trainers attract lightning, so you should always go barefoot in a storm — no support
2. Real lesson: never shelter under a lone tall tree in a storm; the trainers bit is probably exaggerated — ✓ the right answer · no support
3. It proves lightning only strikes boys — ← Mova's choice · score 4
4. It is only gossip, so it proves nothing, and a big tree is still the best shelter from a storm — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 4, the only option with support. Its support: lesson 12, line 16: «If you can hear thunder, you are close enough to be struck by lightning, so get out of the water and go inside a building.», reached through the remembered sentence the question matched. What matched: the same action «strike» (+2); the same doer «lightning» (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 18 · ★ · right ✓

everyone says lightning never strikes the same place twice so stand where it already hit lol

1. It is true, so the old saying keeps you safe, because lightning always looks for somewhere new — no support
2. That is a myth; lightning can strike the same place again, and tall towers are struck many times a year — ← Mova's choice · ✓ the right answer · score 10
3. It is true, so a spot that has already been struck is the very safest place to stand in a storm — no support
4. It is true, but only for trees — 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 15, line 17: «Lightning can strike the same place more than once; tall towers are struck many times a year.», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «tall towers» (+5); the same action «strike» (+3); the same property (+2). · the question and its options parsed, with trees and pragmatics

Test 19 · ★ · right ✓

they're saying Finn's dad drove into the flood and the car floated off, shall i tell everyone

1. Spread it, since floods make good stories and everyone in the class will want to hear it straight away — score 0
2. Spread it, so everyone laughs at his dad — no support
3. Do not spread it about his family; the lesson for you is never to walk or drive into flood water — ← Mova's choice · ✓ the right answer · score 3
4. Spread it, but add that the car sank as well, so the story sounds even more exciting — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 3, against 0 for the next best. Its support: lesson 1, line 7: «A little girl's family left a toy car on the stairs; her grandad stepped on it in the dark, fell and hurt his hip so badly he spent weeks in hospital.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «toy car» (+2); the same circumstance (+2). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

It being given that the interval between a flash of lightning and the ensuing thunder is fifteen seconds, determine the appropriate course of action.

1. To remain out of doors, the storm being at such a distance as to lie beyond any possible danger to persons — ← Mova's choice · no support
2. To wait until the interval falls below five seconds before taking any action whatsoever — no support
3. To shelter beneath the tallest tree in the vicinity — no support
4. To proceed at once into a building or a hard-topped vehicle, the interval being thirty seconds or less — ✓ 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 ✗

Which of the following statements most accurately characterises the protection afforded by a hard-topped metal car during a thunderstorm?

1. Its glass windows repel the lightning — no support
2. It affords no protection whatsoever — no support
3. Its rubber tyres insulate the occupants entirely from the ground beneath them — ← Mova's choice · score 7
4. Its metal body conducts the electrical current around the occupants — ✓ the right answer · score 6

Why: It took the question to ask who or what does it. It chose option 3 with score 7, against 6 for the next best. Its support: lesson 15, line 16: «A hard-topped metal car protects you because its metal body carries the lightning around you; the rubber tyres do not.», 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 doer «rubber tyres» (+3). The right option, 4, scored 6. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Identify the period which should elapse after the last thunder before a return out of doors.

1. Thirty minutes — ← Mova's choice · ✓ the right answer · no support
2. Three minutes — no support
3. Thirty seconds — no support
4. Three hours — 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 shallow flood water.

1. Only stationary flood water presents any danger — no support
2. Flood water is hazardous only when it is cold — ← Mova's choice · score 3
3. Flood water of a depth of less than one metre presents no danger to a person on foot — no support
4. Fast-flowing water of a depth of only fifteen centimetres may knock a person over — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 2 with score 3, the only option with support. Its support: lesson 7, line 18: «Lakes, rivers and the sea can be very cold even on a hot day, and sudden cold water makes you gasp; a gasp with your face under water can make you breathe in w…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «sudden cold water» (+2); the same property (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

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