What is everything made of?
Tests: 4 of 10 right · Exam: 2 of 4 right · Kind: plain · Understood: 6 of 14 · Run: 2026-10-18, commit f3c23ea72
Lesson 1 of the chemistry 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 ✓
Your mate says: "I chewed my pencil, I'm gonna get lead poisoning!" What do you tell him?
- 1. Pencil lead is graphite and clay, there is no lead metal in it — ← Mova's choice · ✓ the right answer · no support
- 2. Pencils have lead only in the rubber at the end — no support
- 3. Only the red pencils still contain real lead, so check the colour — no support
- 4. He's right, he should go to hospital at once — 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 2 · wrong ✗
What would happen if you put food colouring in ice-cold water instead of hot water?
- 1. It would not spread at all, ever — ← Mova's choice · no support
- 2. It would freeze into a coloured lump at once — no support
- 3. It would spread faster than in hot water — no support
- 4. It would spread much more slowly — ✓ 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 3 · wrong ✗
"If atoms are mostly empty space, why can't I walk through the wall, huh?" Best answer?
- 1. The empty space is filled with glue — no support
- 2. You could, if you ran at it fast enough and slipped between them — no support
- 3. Electrons in you and the wall push each other away hard — ✓ the right answer · no support
- 4. Walls are the only thing not made of atoms — ← Mova's choice · score 0
Why: It took the question to ask why something happens (its cause). It chose option 4 with score 0, the only option with support. Its support: lesson 1, line 18: «Your body is built from the atoms in the food you eat, the water you drink and the air you breathe.», reached through the option's own match among the sentences about the question's things. What matched: the same action «build» (+2); the same circumstance (+2). Against it: a different thing acted on (counts against) (-1); one says «not», the other does not (counts against) (-3). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 4 · right ✓
In a cartoon, an ice cube melts and the puddle weighs much less than the ice. What's wrong?
- 1. The puddle weighs the same, the molecules are all still there — ← Mova's choice · ✓ the right answer · score 6
- 2. Melted water weighs nothing at all — no support
- 3. Nothing, water is always lighter than ice, because ice is packed tighter — no support
- 4. The puddle should weigh twice as much — 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 1, line 19: «When ice melts, the same water molecules (a molecule = a small group of atoms joined together) are there before and after; melted ice weighs the same as the ic…», reached through the remembered sentence the question matched. What matched: the same action «weigh» (+4); the same thing acted on «same» (+4). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 5 · wrong ✗
Gran says: "Everything is made of earth, air, fire and water, love." What is the truth?
- 1. She is right, scientists still use those four elements and no others today — ← Mova's choice · no support
- 2. There are exactly four atoms, one for each — no support
- 3. That was an old Greek guess; we now know of over a hundred kinds of atom — ✓ the right answer · no support
- 4. Only living things are made of those four — 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 · right ✓
"nobody's ever seen an atom so they're made up, obviously" Is that right?
- 1. Yes, atoms are only an idea in books — no support
- 2. No, experiments show they are real and special microscopes map them — ← Mova's choice · ✓ the right answer · score 4
- 3. No, you can see each one with an ordinary magnifying glass from home — no support
- 4. Yes, scientists invented them to explain magic — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 4, the only option with support. Its support: lesson 1, line 5: «Nobody has seen an atom with bare eyes, but careful experiments over two hundred years showed they are real, and special microscopes can now map single atoms.», reached through a sentence linked to the one the question matched. What matched: the same action «show» (+2); the same doer «careful experiments» (+2). · the question and its options parsed, with trees and pragmatics
Test 7 · right ✓
On a damp day the balloon trick keeps failing. Why?
- 1. Damp air is too heavy for the balloon to float in — no support
- 2. Water in the air lets the charge leak away — ← Mova's choice · ✓ the right answer · score 10
- 3. Balloons lose their electrons in the dark — no support
- 4. Wet walls are too slippery to stick to — no support
Why: It took the question to ask why something happens (its cause). It chose option 2 with score 10, the only option with support. Its support: lesson 1, line 17: «Rubbing a balloon on a jumper moves electrons onto the balloon, so it becomes charged and can cling to a wall; on a damp day the water in the air lets the char…», reached through the cause of the sentence the question matched. What matched: the same action «leak away» (+4); the same doer «charge» (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics
Test 8 · wrong ✗
Where were the atoms of your hand a hundred years ago?
- 1. Inside the Sun, which sent them down — no support
- 2. Nowhere, because your body made brand new atoms when you were born — ← Mova's choice · score 4
- 3. Somewhere else, in food, air, soil, other living things — ✓ the right answer · no support
- 4. In the same hand, waiting for you — no support
Why: It took the question to ask where. It chose option 2 with score 4, the only option with support. Its support: lesson 1, line 14: «An atom is made of smaller parts: protons and neutrons in a tiny middle called the nucleus, and electrons around it.», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+2); the same thing acted on «atom» (+2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 9 · wrong ✗
Your sister says a pencil dot has "about a hundred atoms in it". Put her right.
- 1. She is right, about a hundred — no support
- 2. It has no atoms, only ink — no support
- 3. It holds exactly one big atom — ← Mova's choice · score 8
- 4. It holds billions upon billions of them — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 3 with score 8, the only option with support. Its support: lesson 1, line 8: «Even one pencil dot holds more atoms than the number of people who have ever lived.», reached through the remembered sentence the question matched. What matched: the same action «hold» (+4); the same thing acted on «more atoms» (+4). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 10 · wrong ✗
Why does your hair stand up after you pull off a woolly hat?
- 1. The wool pulls each hair upward by gravity — ← Mova's choice · no support
- 2. Your hair gets cold and stiff, like grass on a frosty morning — no support
- 3. The hat leaves sticky wool on each hair — no support
- 4. Rubbing charged your hairs alike, so they push each other apart — ✓ 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 1 · formal language · wrong ✗
Which of the following statements most accurately characterises the constitution of ordinary matter?
- 1. Matter consists of the four elements earth, air, fire and water — ← Mova's choice · no support
- 2. Matter may be subdivided indefinitely without limit — no support
- 3. Only living matter is composed of particles — no support
- 4. All matter is composed of minute particles designated atoms — ✓ 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 2 · formal language · right ✓
It is given that a coloured substance disperses throughout still water in the absence of agitation. Identify the principal cause.
- 1. The continual random motion of the particles of the water — ← Mova's choice · ✓ the right answer · no support
- 2. Currents generated by the observer's breath — no support
- 3. Attraction exerted by the walls of the vessel — no support
- 4. The superior weight of the colouring agent, which descends and spreads — 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 · wrong ✗
Select the response that is consistent with the established facts concerning the composition of an atom.
- 1. It comprises a multitude of smaller molecules — ← Mova's choice · no support
- 2. It comprises a nucleus of protons and neutrons, surrounded by electrons — ✓ the right answer · no support
- 3. It comprises a single electron alone — no support
- 4. It comprises a solid indivisible sphere with no internal parts whatsoever — 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 4 · formal language · right ✓
Ascertain the mass of the water obtained upon the complete melting of an ice cube whereof the mass is ten grams.
- 1. Ten grams, the quantity of matter being unaltered — ← Mova's choice · ✓ the right answer · no support
- 2. Less than ten grams, owing to the loss of molecules — no support
- 3. Zero grams, liquids being without mass — no support
- 4. More than ten grams, owing to absorption of heat — 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/chemistry/1-what-is-everything-made-of/