Smells that warn

Tests: 12 of 19 right · Exam: 4 of 4 right · Kind: ★ · Understood: 17 of 23 · Run: 2026-10-18, commit f3c23ea72

Lesson 13 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 ✓

Leo comes home and the hallway smells of rotten eggs. He reaches for the light switch. What should he do instead?

1. Leave the switch alone and go back outside — ← Mova's choice · ✓ the right answer · score 9
2. Switch on the light to look for the leak — no support
3. Light a candle so that he can see — no support
4. Open the cooker to check the knobs — no support

Why: It took the question to ask what is done. It chose option 1 with score 9, the only option with support. Its support: lesson 13, line 5: «Example: you walk into a kitchen and smell rotten eggs — do not touch the light switch; leave, and tell an adult from outside.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same action «leave» (+4). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

Which is true about natural gas?

1. It smells of rotten eggs all by itself, straight from the ground — ← Mova's choice · score 10
2. It smells sweet, like flowers — score 6
3. Only dogs are able to smell it — score 0
4. It has no smell until a smelly chemical is added — ✓ the right answer · score 7

Why: It took the question to ask which statement is true. It chose option 1 with score 10, against 7 for the next best. Its support: lesson 13, line 9: «Leaking gas smells like rotten eggs.», reached through the remembered sentence the question matched. What matched: the same circumstance (+4); the same action «smell» (+3); the same doer «leaking gas» (+3). The right option, 4, scored 7. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

A girl finds cooked chicken in the fridge from a week ago. It smells fine. What should she think?

1. It is safe if she sniffs it a second time and it still smells fine — ← Mova's choice · score 2
2. It is safe to eat if she eats it cold — no support
3. It may still be unsafe, so better thrown out — ✓ the right answer · no support
4. It is safe to eat because it smells fine — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 2, the only option with support. Its support: lesson 10, line 5: «Stopping slowly is gentler than stopping suddenly, which is why bent knees, sand, mats and helmet foam soften a landing: a girl in Edinburgh jumping into a san…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «girl» (+2); the same property (+1). Against it: a different action (counts against) (-1). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · wrong ✗

Why is carbon monoxide called a silent danger?

1. You cannot see, smell or taste it — ✓ the right answer · no support
2. It only appears at night — no support
3. It makes no sound when it burns — ← Mova's choice · score 3
4. It is too heavy to move around — no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 3, the only option with support. Its support: lesson 13, line 20: «Carbon monoxide has no smell or colour, and it can make people sleepy, sick and even kill them.», reached through the same lesson line as the sentence the question matched. What matched: the same action «make» (+2); the same doer «monoxide» (+2). Against it: a different thing acted on (counts against) (-1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · right ✓

A room is filling with smoke. Where is the best air?

1. Near the ceiling — no support
2. Near the floor — ← Mova's choice · ✓ the right answer · score 16
3. On top of a table — no support
4. Up by the light — no support

Why: It took the question to ask where. It chose option 2 with score 16, the only option with support. Its support: lesson 13, line 12: «Hot smoke rises, so in a fire the cleaner air is near the floor.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same doer «cleaner air» (+4); the same place «floor» (+4); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · right ✓

An adult is mixing two cleaners and a sharp smell fills the bathroom. What should happen?

1. Stop, open the windows and leave the room — ← Mova's choice · ✓ the right answer · no support
2. Sniff it closely to check the smell — no support
3. Add hot water and stir it faster — no support
4. Keep mixing to make it stronger and clean better — 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 · ★ · wrong ✗

If no smell were added to gas, what would happen?

1. People would not notice leaks — ✓ the right answer · score 3
2. Gas would stop burning — no support
3. Cookers would need no flame — no support
4. Leaks would be noticed sooner — ← Mova's choice · score 5

Why: It took the question to ask which statement is true. It chose option 4 with score 5, against 3 for the next best. Its support: lesson 13, line 3: «Natural gas for cooking and heating has no smell of its own, so gas companies add a chemical that smells like rotten eggs, just so people notice a leak.», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «leak» (+4); the same action «notice» (+2). Against it: a different doer (counts against) (-1). The right option, 1, scored 3. · the question and its options parsed, with trees and pragmatics

Test 8 · ★ · wrong ✗

Why do fire safety lessons say to get out first and phone afterwards?

1. Calls from inside go to the wrong place — ← Mova's choice · no support
2. The fire stops while you are on the phone — no support
3. Phones only work outdoors — no support
4. Staying in to call wastes precious time — ✓ 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 9 · ★ · right ✓

After an hour in a freshly painted room, Jack can no longer smell the paint. Why?

1. His nose has got used to the smell — ← Mova's choice · ✓ the right answer · score 4
2. The paint has stopped smelling — no support
3. The smell has all gone up to the ceiling — no support
4. He has caught a cold from it — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 4, the only option with support. Its support: lesson 13, line 18: «After you smell something for a while, your nose gets used to it and you notice it less.», reached through the same lesson line as the sentence the question matched. What matched: the same action «use» (+2); the same doer «nose» (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

kitchen smells like rotten eggs, turn the light on?

1. Yes, so you can find the leak — ← Mova's choice · score 6
2. Yes, then open the oven — no support
3. Light a match so you can see the cooker better — no support
4. No, leave and call for help from outside — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 1 with score 6, the only option with support. Its support: lesson 13, line 3: «Natural gas for cooking and heating has no smell of its own, so gas companies add a chemical that smells like rotten eggs, just so people notice a leak.», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «leak» (+4); the same action «notice» (+2). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · right ✓

milk smells fine but it's way past the date, drink it?

1. When in doubt, throw it out — ← Mova's choice · ✓ the right answer · no support
2. Yes, smell is always a safe test — no support
3. Yes, just boil it a bit — no support
4. Yes, if it looks white — 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 · ★ · wrong ✗

can i mix bleach n the other cleaner to make it stronger

1. Yes, if you use cold water — ← Mova's choice · no support
2. Only in a small bucket — no support
3. No, some mixes give off poisonous gas — ✓ the right answer · no support
4. Yes, it cleans twice as well — 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 13 · ★ · right ✓

smell smoke upstairs, what do i do

1. Tell an adult and get out if unsure — ← Mova's choice · ✓ the right answer · score 4
2. Open all the windows first — no support
3. Wait and see if it gets worse — no support
4. Go and look for the fire alone — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 4, the only option with support. Its support: lesson 13, line 13: «If you smell smoke, tell an adult at once, and get out if it is not clearly safe.», reached through the same lesson line as the sentence the question matched. What matched: the same action «tell» (+2); the same receiver «adult» (+2). · the question and its options parsed, with trees and pragmatics

Test 14 · ★ · right ✓

kitchen smells like rotten eggs, mum's out

1. Turn on the lights to look for it — no support
2. Light a candle to cover the smell — no support
3. Open the oven to check it, then ring mum at work — no support
4. Get out and call for help from outside — ← Mova's choice · ✓ the right answer · score 2

Why: It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 13, line 6: «A family in Boston had a boiler that leaked carbon monoxide, a gas with no smell; they kept getting headaches and feeling sleepy until a carbon monoxide alarm…», reached through the option's own match among the sentences about the question's things. What matched: the same action «get out» (+2); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 15 · ★ · right ✓

whole family's got headaches and feels sleepy, the co alarm's beeping

1. Take a nap and see if it passes — no support
2. Turn the alarm off and open one window in the kitchen a bit — no support
3. Make tea and sit down together — no support
4. Get everyone out into fresh air and call for help — ← Mova's choice · ✓ the right answer · score 2

Why: It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 13, line 6: «A family in Boston had a boiler that leaked carbon monoxide, a gas with no smell; they kept getting headaches and feeling sleepy until a carbon monoxide alarm…», reached through the same lesson line as the sentence the question matched. What matched: the same action «get out» (+2); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 16 · ★ · right ✓

Ben says if u can't smell anything there's no gas danger. true?

1. No, carbon monoxide has no smell at all — ← Mova's choice · ✓ the right answer · score 9
2. Yes, unless you have a cold and a blocked nose — no support
3. Yes, gas always smells like smoke — score 6
4. Yes, all dangerous gases smell — score 6

Why: It took the question to ask which statement is true. It chose option 1 with score 9, against 6 for the next best. Its support: lesson 13, line 3: «Natural gas for cooking and heating has no smell of its own, so gas companies add a chemical that smells like rotten eggs, just so people notice a leak.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «natural gas» (+4); the same thing acted on «smell» (+4); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 17 · ★ · right ✓

did u hear the Patels' flat nearly blew up cos someone flicked the light on when it smelled of gas, the windows came out

1. It is gossip, so a gas smell is nothing to worry about — no support
2. Real lesson: if you smell gas, touch no switches and get out; «windows came out» may be exaggerated — ← Mova's choice · ✓ the right answer · score 7
3. Real lesson: lights are always dangerous to switch on — no support
4. It proves gas only explodes in flats — 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 13, line 11: «If you smell gas, do not touch switches; leave the building and call for help from outside.», reached through the remembered sentence the question matched. What matched: the same thing acted on «gas» (+4); the same action «smell» (+3). · the question and its options parsed, with trees and pragmatics

Test 18 · ★ · right ✓

my mate says you'd smell carbon monoxide straight away, it smells like burning

1. He is right, it smells like rotten eggs — score 3
2. That is false; carbon monoxide has no smell, which is why homes need alarms — ← Mova's choice · ✓ the right answer · score 5
3. He is right, it smells like smoke — score 0
4. He is right, but only at night — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 5, against 3 for the next best. Its support: lesson 13, line 20: «Carbon monoxide has no smell or colour, and it can make people sleepy, sick and even kill them.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «carbon monoxide» (+2); the same thing acted on «smell» (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 19 · ★ · right ✓

someone's spreading that Ella's lunch box stinks cos her family's dirty, it's going round

1. Do not pass it on; it is cruel and probably untrue, and it hurts her — ← Mova's choice · ✓ the right answer · no support
2. Pass it on, so she brings different food — no support
3. Pass it on, because a smell is a fact — no support
4. Pass it on, but only to her friends — 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 1 · formal language · right ✓

Which of the following statements most accurately characterises the odour associated with a leak of domestic gas?

1. A leak of gas produces no detectable odour of any kind — score 5
2. Natural gas being odourless, a strong-smelling substance resembling rotten eggs is added to it — ← Mova's choice · ✓ the right answer · score 7
3. Natural gas smells faintly of flowers — score 7
4. Natural gas possesses of itself a strong odour of rotten eggs — score 6

Why: It took the question to ask who or what does it. It chose option 2 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 13, line 3: «Natural gas for cooking and heating has no smell of its own, so gas companies add a chemical that smells like rotten eggs, just so people notice a leak.», 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 «natural gas» (+3). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

It being given that an odour of gas is perceived within a dwelling, select the response consistent with established guidance.

1. To refrain from operating switches, to leave the building, and to summon assistance from outside — ← Mova's choice · ✓ the right answer · no support
2. To light a match so as to burn away the gas — no support
3. To telephone for help from within the kitchen — no support
4. To switch on the lights in order to locate the leak — 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 food of doubtful condition.

1. Food that smells normal is invariably safe to consume — score 4
2. Some harmful bacteria alter neither smell nor appearance, wherefore doubtful food should be discarded — ← Mova's choice · ✓ the right answer · score 7
3. Heating spoiled food always renders it safe — score 3
4. Food spoiled by bacteria always smells sour — score 5

Why: It took the question to ask which statement is true. It chose option 2 with score 7, against 5 for the next best. Its support: lesson 13, line 17: «A safe rule for doubtful food is: when in doubt, throw it out.», reached through the remembered sentence the question matched. What matched: the same thing acted on «food» (+4); the same action «throw out» (+3). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · right ✓

Identify the principal reason for which cleaning products must never be mixed together.

1. The containers are rendered unfit for recycling — no support
2. The mixture becomes excessively sticky — no support
3. Certain mixtures give off a poisonous gas — ← Mova's choice · ✓ the right answer · score 5
4. The mixture invariably ceases to clean — 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 13, line 19: «Some cleaning products give off a poisonous gas when mixed, so they must never be mixed.», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «poisonous gas» (+4); the same action «give off» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

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