Measuring the world — length, mass, time and temperature
Tests: 8 of 13 right · Exam: 1 of 4 right · Kind: plain · Understood: 8 of 17 · Run: 2026-10-18, commit f3c23ea72
Lesson 90 of the world 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 ✗
An astronaut with a mass of 60 kilograms goes to the Moon. What is his mass there?
- 1. About 10 kilograms — ← Mova's choice · no support
- 2. About 360 kilograms — no support
- 3. Still 60 kilograms — ✓ the right answer · no support
- 4. Nothing at all — 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 2 · right ✓
Which is true?
- 1. A kilometre is longer than a thousand centimetres — ← Mova's choice · ✓ the right answer · no support
- 2. A minute is 100 seconds — no support
- 3. Water freezes at 100 degrees Celsius — no support
- 4. A kilogram is less than a gram — 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 3 · wrong ✗
Sam and his dad each measure the garden in steps and get different numbers. What would solve the problem?
- 1. Walking faster — ← Mova's choice · no support
- 2. Using a tape measure in metres — ✓ the right answer · no support
- 3. Taking much smaller steps each time — no support
- 4. Measuring at night — 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 4 · right ✓
Ella measures a pencil starting from the 1 cm mark and reads 13 cm. How long is it really?
- 1. 12 cm — ← Mova's choice · ✓ the right answer · no support
- 2. 13 cm — no support
- 3. 1 cm — no support
- 4. 14 cm — 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 5 · right ✓
Which pair matches the right tool?
- 1. Time and a stopwatch — ← Mova's choice · ✓ the right answer · no support
- 2. Length and kitchen scales — no support
- 3. Temperature and a ruler — no support
- 4. Mass and a thermometer — 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 ✗
A full 2-litre bottle of water is put on scales. About what will they show, not counting the bottle?
- 1. 200 kilograms — ← Mova's choice · score 6
- 2. 20 kilograms — score 6
- 3. 2 kilograms — ✓ the right answer · score 6
- 4. 2 grams — score 6
Why: It took the question to ask what it is done to. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 49, line 15: «A larger scale, such as 1 centimetre to 10 metres, shows a small area in great detail.», reached through the option's own match among the sentences about the question's things. What matched: the same action «show» (+5); the same doer «larger scale» (+2). Against it: a different thing acted on (counts against) (-1). The right option, 3, scored 6. · the question and its options parsed, with trees and pragmatics
Test 7 · wrong ✗
A child's thermometer shows 39 degrees Celsius. What does it suggest?
- 1. Water would freeze on the child's skin — ← Mova's choice · score 7
- 2. The temperature is normal — score 6
- 3. The child's body is too cold — no support
- 4. The child has a fever — ✓ the right answer · score 5
Why: It took the question to ask what it is done to. It chose option 1 with score 7, against 6 for the next best. Its support: lesson 90, line 11: «Water freezes at 0 degrees Celsius and boils at about 100 degrees Celsius.», reached through the option's own match among the sentences about the question's things. What matched: the same action «freeze» (+5); the same doer «water» (+2). The right option, 4, scored 5. · the question and its options parsed, with trees and pragmatics
Test 8 · wrong ✗
Three pupils time the same toy car run: 4.1, 4.3 and 4.2 seconds. What is the best value to report?
- 1. Only the slowest, 4.3 seconds — ← Mova's choice · no support
- 2. Only the fastest, 4.1 seconds — no support
- 3. The average, about 4.2 seconds — ✓ the right answer · no support
- 4. The total, 12.6 seconds — 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 9 · right ✓
Why do shops all use the same kilogram?
- 1. So that everyone gets the same amount for the same price — ← Mova's choice · ✓ the right answer · no support
- 2. So that scales need no batteries — no support
- 3. So that bags break less often — no support
- 4. So that food stays fresh longer — 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 10 · right ✓
how many grams in a kilo again
- 1. 1000 — ← Mova's choice · ✓ the right answer · score 6
- 2. 100 — no support
- 3. 10 — no support
- 4. 10,000 — 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 90, line 8: «A kilogram is 1000 grams.», reached through the remembered sentence the question matched. What matched: the number the lesson gave for it (+6). · the question and its options parsed, with trees and pragmatics
Test 11 · right ✓
measured the table 3 times and got 3 diff numbers, what now
- 1. Use only the biggest number, because it's safest — no support
- 2. Take the average of the measurements — ← Mova's choice · ✓ the right answer · score 7
- 3. Throw them all away and guess — no support
- 4. Use only the first number — 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 90, line 16: «Measuring the same thing several times and taking the average (add the results up and divide by how many there are) gives a more reliable result.», reached through a sentence linked to the one the question matched. What matched: the same action «take» (+4); the same thing acted on «average» (+3). · the question and its options parsed, with trees and pragmatics
Test 12 · right ✓
Leo says u'd have less mass on the Moon. true?
- 1. Yes, and your weight stays the same — score 3
- 2. No, you weigh more on the Moon — no support
- 3. Yes, the Moon takes away some of your mass — no support
- 4. No, mass stays the same, but you weigh less there — ← 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, against 3 for the next best. Its support: lesson 90, line 4: «Mass is how much stuff is in something; weight is how hard gravity pulls on it. On the Moon an astronaut's mass stays the same but his weight is about six time…», reached through the option's own match among the sentences about the question's things. What matched: the same action «stay» (+3); the same doer «mass» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics
Test 13 · right ✓
my brother started measuring from the end of the ruler, not the zero. is that right?
- 1. Yes, if you add one centimetre — no support
- 2. No, you must start from the zero mark — ← Mova's choice · ✓ the right answer · score 8
- 3. Yes, any end of the ruler works — no support
- 4. No, you must start from the 1 mark — score 8
Why: It took the question to ask which statement is true. It chose option 2 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 90, line 15: «When measuring with a ruler you must start from the zero mark.», reached through the remembered sentence the question matched. What matched: the same action «start» (+4); the same place «zero mark» (+4). · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
Ascertain the number of grams contained in one kilogram.
- 1. Ten thousand — ← Mova's choice · no support
- 2. One thousand — ✓ the right answer · no support
- 3. One hundred — no support
- 4. Ten — 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 ✓
Which of the following statements most accurately characterises the distinction between mass and weight?
- 1. Mass is the pull of gravity; weight is the amount of matter — score 11
- 2. Mass changes upon the Moon; weight does not — score 9
- 3. Mass and weight are identical in every place — score 11
- 4. Mass is the amount of matter; weight is the pull of gravity upon it — ← Mova's choice · ✓ the right answer · score 12
Why: It took the question to ask who or what does it. It chose option 4 with score 12, against 11 for the next best. Its support: lesson 90, line 13: «Mass is the amount of matter in an object; weight is the pull of gravity on it.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «pull» (+4); it fills the role the question asks for (+3); the same doer «weight» (+2); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · wrong ✗
It is given that an object is transported from the Earth to the Moon. Determine which of its quantities remains unaltered.
- 1. Its weight — ← Mova's choice · no support
- 2. Neither its mass nor its weight — no support
- 3. Its mass — ✓ the right answer · no support
- 4. Both its mass and its weight — 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 the obtaining of a reliable measurement.
- 1. Measure once only and with great speed — no support
- 2. Choose the largest of several measurements — no support
- 3. Measure several times and take the average — ✓ the right answer · no support
- 4. Measure from any mark upon the ruler — ← Mova's choice · score 5
Why: It took the question to ask which statement is true. It chose option 4 with score 5, the only option with support. Its support: lesson 90, line 15: «When measuring with a ruler you must start from the zero mark.», reached through the option's own match among the sentences about the question's things. What matched: the same action «measure» (+3); the same circumstance (+2). The right option, 3, 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/world/90-measuring-the-world/