Petrol stations, pools and things that go bang
Tests: 4 of 10 right · Exam: 2 of 4 right · Kind: ★ · Understood: 9 of 14 · Run: 2026-10-18, commit f3c23ea72
Lesson 23 of the myths 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 ✗
"dad turned off his phone at the pump lol does it rly blow up" What's the honest answer?
- 1. Only iPhones do it, not other phones — no support
- 2. No proven case, but follow the station's rules; static is the bigger risk — ✓ the right answer · no support
- 3. No, so you can use your phone however you like — ← Mova's choice · score -3
- 4. Yes, phones blow up petrol stations every week — no support
Why: It took the question to ask which statement is true. It chose option 3 with score -3, the only option with support. Its support: lesson 23, line 7: «Petrol stations still ask people not to use phones at the pump, and you should follow their rules; a phone also distracts people near fuel and cars.», reached through the option's own match among the sentences about the question's things. What matched: the same action «use» (+1). Against it: a different doer (counts against) (-1); one says «not», the other does not (counts against) (-3). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 2 · ★ · wrong ✗
Your big cousin says the pool will go red if you wee. Is that why you shouldn't?
- 1. It's fine to wee in the pool, because the red dye doesn't actually exist — ← Mova's choice · score 3
- 2. Yes, the red dye is the only reason not to — no support
- 3. No dye exists, but weeing in a pool is still unfair and unclean — ✓ the right answer · score 3
- 4. The dye exists but only works at night — no support
Why: It took the question to ask why something happens (its cause). It chose option 1 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 23, line 8: «No chemical exists that turns pool water red around someone who wees; the story is told to stop children doing it, and weeing in a pool is still unclean and un…», reached through the same lesson line as the sentence the question matched. What matched: the same place «pool» (+2); the same action «wee» (+1). The right option, 3, scored 3. · the question and its options parsed, with trees and pragmatics
Test 3 · ★ · right ✓
Ella swears a shark came into the hotel pool through the pipes. Which question shows the story can't work?
- 1. Was it the deep end or the shallow end? — no support
- 2. Did the hotel give the shark a room? — no support
- 3. What colour was the shark when it arrived in the pool? — no support
- 4. How would a shark fit through narrow, filtered pipes? — ← Mova's choice · ✓ the right answer · score 8
Why: It took the question to ask who or what does it. It chose option 4 with score 8, the only option with support. Its support: lesson 23, line 4: «But a dropped penny can't kill, there's no magic dye for wee, and no shark can squeeze through pool pipes.», reached through the remembered sentence the question matched. What matched: the same place «pool pipes» (+4); it fills the role the question asks for (+4); the same doer «shark» (+2). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 4 · ★ · wrong ✗
"if u drop a penny off the shard it kills someone, fact" What would really happen?
- 1. It would kill instantly, so pennies are banned — score 0
- 2. Air slows it; it would sting, but heavy things are still dangerous — ✓ the right answer · score 4
- 3. It would burn up in the air — ← Mova's choice · score 5
- 4. It would bounce back up to the top — 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 23, line 10: «A penny dropped from a skyscraper slows down in the air and tumbles; it would sting but would not kill, though dropping heavier things from a height can be dea…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «penny» (+3); the same place «air» (+3). Against it: a different action (counts against) (-1). The right option, 2, scored 4. · the question and its options parsed, with trees and pragmatics
Test 5 · ★ · wrong ✗
The sky rumbles while you're in the outdoor pool, and Mia says lightning will hit the pool. What do you do?
- 1. Stay in but keep your head down — ← Mova's choice · no support
- 2. Ignore her, it's only a myth — no support
- 3. Get out now; being in water in a storm is dangerous — ✓ the right answer · no support
- 4. Swim faster and faster so the lightning can't catch you — 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 ✗
Callum's hair stands up on the trampoline and he shouts that the static could kill him. Is he right?
- 1. Yes, if he jumps for more than a minute — ← Mova's choice · no support
- 2. Yes, he should call an ambulance — no support
- 3. No, but it gives you a fever — no support
- 4. No, it's a harmless zap — ✓ 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 ✓
A friend wants to mix two cleaners to make "super cleaner". What should you do?
- 1. Mix them, but only a little — no support
- 2. Say no and tell an adult; some mixtures make poisonous gas — ← Mova's choice · ✓ the right answer · score 4
- 3. Add water so it isn't dangerous — no support
- 4. Mix them outside where it's safe — no support
Why: It took the question to ask what is done. It chose option 2 with score 4, the only option with support. Its support: lesson 7, line 5: «The best friends of animals check with a vet or an animal charity, and gently pass the real facts on without making anybody feel silly.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same action «make» (+2). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · right ✓
"mentos + coke = kitchen explosion, my mate's kitchen got destroyed" What would really happen in an open bottle?
- 1. A blast that knocks down the walls — no support
- 2. The cola would catch fire — no support
- 3. A fizzy fountain and a sticky mess — ← Mova's choice · ✓ the right answer · score 3
- 4. The bottle would fly to the ceiling — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 3, the only option with support. Its support: lesson 1, line 15: «Mints dropped into an open bottle of cola make a real fizzy fountain, but in a body the gas just comes back up as burps; the stomach does not explode.», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «real fizzy fountain» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics
Test 9 · ★ · right ✓
Henry charges his phone under the duvet every night. What is the real risk?
- 1. Nothing at all could ever happen — no support
- 2. It could overheat and start a fire — ← Mova's choice · ✓ the right answer · score 3
- 3. He will be electrocuted in his sleep — no support
- 4. His phone will stop working forever — no support
Why: It took the question to ask what it is done to. It chose option 2 with score 3, the only option with support. Its support: lesson 23, line 15: «A phone charger in bed will not electrocute you (give you a deadly electric shock), but a phone or charger under a pillow or duvet can overheat and start a fir…», reached through the option's own match among the sentences about the question's things. What matched: the same action «start» (+3); it fills the role the question asks for (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · wrong ✗
Ava says holding your breath helps you float. Her brother says that's a myth. Who is right?
- 1. Her brother: breath makes no difference — no support
- 2. Ava: air in the lungs helps you float — ✓ the right answer · no support
- 3. Neither: holding your breath makes you sink — ← Mova's choice · score 5
- 4. Both: it helps only in salty sea water — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 5, the only option with support. Its support: lesson 23, line 16: «Holding your breath does help you float, because air in your lungs makes you lighter for your size.», reached through the remembered sentence the question matched. What matched: the same thing acted on «breath» (+3); the same action «hold» (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
Identify the principal cause of fires occurring at fuel pumps, as ascertained from investigations.
- 1. The operation of mobile telephones — ← Mova's choice · no support
- 2. The heating of fuel by sunlight — no support
- 3. The discharge of static electricity — ✓ the right answer · no support
- 4. The use of electric vehicle chargers nearby — 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 ✓
It is given that thunder is audible while a person is swimming in an outdoor pool. Select the response consistent with established safety guidance.
- 1. The person should remain submerged until the thunder ceases — no support
- 2. The person may continue swimming, the water affording protection — no support
- 3. The person should leave the water and remain out until the storm has passed — ← Mova's choice · ✓ the right answer · score 0
- 4. The person should proceed to the deepest part of the pool — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 0, the only option with support. Its support: lesson 16, line 4: «The best weapon is a simple test. Pull the plug in your sink five times, balance an egg on an ordinary Tuesday, leave salty water in the sun, stir cornflour an…», reached through the option's own match among the sentences about the question's things. What matched: the same action «leave» (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · right ✓
Which of the following statements most accurately characterises the hazard of combining bleach with other cleaning products?
- 1. Certain combinations liberate poisonous gases — ← Mova's choice · ✓ the right answer · no support
- 2. The combination merely diminishes the bleach's colour — no support
- 3. All such combinations are entirely harmless — no support
- 4. The combination solely impairs the cleaning effect — 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 ✗
Determine the principal hazard associated with the charging of a telephone beneath bedding.
- 1. Electrocution of the person sleeping beside it — ← Mova's choice · no support
- 2. Permanent loss of all the data stored upon it — no support
- 3. Overheating, with a consequent risk of fire — ✓ the right answer · no support
- 4. Interference with the sleeper's dreams and rest — 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/myths/23-petrol-stations-pools-and-things-that-go-bang/