Batteries

Tests: 6 of 11 right · Exam: 0 of 4 right · Kind: ★ · Understood: 10 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 34 of the technology 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 ✓

«my AA is dead, just chuck it in the kitchen bin» What is the right answer?

1. Bury it in a flower pot — no support
2. The kitchen bin is fine for batteries — no support
3. Burn it in the garden to get rid of it — no support
4. Take it to a battery recycling bin — ← Mova's choice · ✓ the right answer · 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 34, line 4: «Batteries store a lot of energy in a small space, so they have strong rules: never open, burn or crush one, never mix old and new, keep chargers off beds, and…», reached through the remembered sentence the question matched. What matched: the same action «take» (+4); the same place «battery bin» (+4). Against it: a different doer (counts against) (-2); a different thing acted on (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · right ✓

«put the new batteries in with the old ones, who cares» What is the right rule?

1. Mixing them makes the toy go faster — score 6
2. Mixing is fine if they are the same colour — score 5
3. Old ones recharge from new ones — score 5
4. Never mix old and new batteries — ← Mova's choice · ✓ the right answer · score 7

Why: It took the question to ask who or what does it. It chose option 4 with score 7, against 6 for the next best. Its support: lesson 34, line 7: «Never open, burn or crush a battery, and never mix old and new batteries in the same toy.», reached through the remembered sentence the question matched. What matched: the same thing acted on «old batteries» (+4); the same action «mix» (+3). · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · right ✓

«phone's getting hot on charge, eh whatever» What should you do?

1. Put it in the fridge or freezer for an hour to cool it — no support
2. Stop charging, unplug it and tell an adult — ← Mova's choice · ✓ the right answer · score 5
3. Put it under a pillow so that it cools down quietly — no support
4. Keep charging so it finishes faster and stops being hot — no support

Why: It took the question to ask what is done. It chose option 2 with score 5, the only option with support. Its support: lesson 16, line 7: «Never put fingers, keys, pencils or anything else into a socket, and tell an adult if a socket is broken or scorched.», reached through the option's own match among the sentences about the question's things. What matched: the same receiver «adult» (+2); it fills the role the question asks for (+2); the same action «tell» (+1). · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · wrong ✗

In a cartoon, a hero opens a battery to drink the electricity for power. What is the real rule?

1. It is fine if the battery is flat — score 0
2. Opening it lets the air in and makes the battery last much longer — ← Mova's choice · score 5
3. Never open a battery; the chemicals inside are harmful — ✓ the right answer · no support
4. Batteries are full of a sweet energy drink — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 5, against 0 for the next best. Its support: lesson 34, line 17: «Giant grid batteries, made of thousands of cells in containers, store electricity to smooth out wind and solar and can respond in less than a second.», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+2); it fills the role the question asks for (+2); the same thing acted on «giant grid batteries» (+1). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · right ✓

What would happen if a power bank went in a checked suitcase and caught fire in the hold?

1. No one could reach it to put the fire out, which is why airlines forbid it — ← Mova's choice · ✓ the right answer · score 3
2. The pilot would land on the nearest cloud — no support
3. The suitcase would charge the plane — no support
4. Nothing, the hold is fireproof and empty — no support

Why: It took the question to ask what happens next. It chose option 1 with score 3, the only option with support. Its support: lesson 34, line 13: «Old batteries go in a special recycling bin so their metals can be used again and their chemicals stay out of landfill; batteries thrown in normal bins have st…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «batteries» (+2); the same thing acted on «fires» (+2). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

Count them: a remote control needs 2 AA batteries and a torch needs 3. How many for both?

1. 3 — ← Mova's choice · no support
2. 6 — no support
3. 4 — no support
4. 5 — ✓ 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 · ★ · wrong ✗

Count them: a science class lights an LED with lemons. Each group needs 4 lemons and there are 3 groups. How many lemons?

1. 7 — ← Mova's choice · no support
2. 12 — ✓ the right answer · no support
3. 4 — no support
4. 16 — 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 ✓

Count them: your phone shows 80% and uses 10% every hour. After 3 hours, about what does it show?

1. 50% — ← Mova's choice · ✓ the right answer · no support
2. 77% — no support
3. 30% — no support
4. 70% — 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 ✓

«my brother says a wireless charger squirts electricity through the air like a hose» What is the best correction?

1. Right, it sprays tiny drops of electricity — no support
2. It charges using the light from the room — no support
3. It works by heating the phone up — no support
4. A coil makes a changing magnetic field and a coil in the phone turns it back into electricity — ← Mova's choice · ✓ the right answer · score 6

Why: It took the question to ask which statement is true. It chose option 4 with score 6, the only option with support. Its support: lesson 34, line 15: «A wireless charger has a coil in the pad that makes a changing magnetic field, and a coil in the phone turns it back into electricity; electric toothbrushes ha…», reached through the option's own match among the sentences about the question's things. What matched: the same action «turn back» (+2); the same doer «coil» (+2); the same thing acted on «field» (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

«why does the battery go from like 10 to dead so fast, rubbish phone» What is the real reason?

1. The phone hides 10% for itself — no support
2. Batteries always run down much faster at the very end of the day — ← Mova's choice · score 4
3. The percentage is only an estimate made by a chip — ✓ the right answer · score 2
4. The screen counts in tens — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, against 2 for the next best. Its support: lesson 34, line 17: «Giant grid batteries, made of thousands of cells in containers, store electricity to smooth out wind and solar and can respond in less than a second.», reached through the cause of the sentence the question matched. What matched: the same doer «giant grid batteries» (+4). The right option, 3, scored 2. · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · wrong ✗

A house has solar panels. Why might the family want a home battery too?

1. To make the panels keep working at night in the dark — ← Mova's choice · score 4
2. To use the sunshine's electricity in the evening — ✓ the right answer · no support
3. To stop the panels getting dirty from rain and bird mess — no support
4. To sell the battery later for more than they paid for 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 33, line 7: «In a solar panel, light hits special silicon cells and knocks tiny electrons free, which flow as electricity; panels still work on cloudy days and in winter, j…», reached through the option's own match among the sentences about the question's things. What matched: the same action «work» (+2); the same doer «panels» (+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 reason for which a battery ceases to supply electricity.

1. The external casing has become excessively cold — no support
2. The terminals have been reversed by the user — no support
3. The chemical substances within it have been consumed by reaction — ✓ the right answer · no support
4. The electricity has gradually escaped through the casing into the surrounding air — ← Mova's choice · score 3

Why: It took the question to ask which statement is true. It chose option 4 with score 3, the only option with support. Its support: lesson 11, line 1: «Every cooking machine in the kitchen does one job: it turns electricity or burning gas into heat and puts that heat into food.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «electricity» (+2); the same circumstance (+2). 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

Exam question 2 · formal language · wrong ✗

Select the response consistent with the established facts concerning the carriage of a power bank upon an aircraft.

1. It shall be placed exclusively within a checked suitcase in the hold — ← Mova's choice · no support
2. It shall be surrendered to the pilot upon boarding the aircraft — no support
3. No restriction whatsoever applies to its carriage upon an aircraft — no support
4. It shall be carried in hand luggage and not in a checked bag — ✓ 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

Exam question 3 · formal language · wrong ✗

Ascertain the reason for which spent batteries are to be deposited in a separate recycling receptacle.

1. Refuse vehicles are permitted to accept them only upon Sundays and upon public holidays — ← Mova's choice · no support
2. They emit an offensive odour in ordinary receptacles — no support
3. They are of excessive weight for ordinary receptacles — no support
4. Their metals may be recovered and they may otherwise cause fires in refuse vehicles — ✓ 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 4 · formal language · wrong ✗

Which of the following statements most accurately characterises the operation of a wireless charger?

1. Electricity is transmitted through the air in the form of visible sparks — no support
2. The device is charged by heat conducted from the pad — no support
3. The device is charged by light emitted from the pad — ← Mova's choice · score 4
4. A coil in the pad produces a changing magnetic field which a coil in the device converts into electricity — ✓ the right answer · no support

Why: It took the question to ask who or what does it. It chose option 3 with score 4, the only option with support. Its support: lesson 21, line 7: «Rails are fixed to sleepers laid on a bed of stones; at a level crossing, lights flash and barriers close the road before a train comes, and a second train may…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+3); the same doer «lights» (+2). Against it: a different action (counts against) (-1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/technology/34-batteries/