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Let's test it! Experiments and fair tests

Tests: 9 of 11 right · Exam: 3 of 4 right · Kind: ★★ · Understood: 6 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 29 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 · ★★ · right ✓

"talk to my tomatoes every day and they're massive, so it works innit" What's the problem with this proof?

  • 1. There's no untalked-to tray to compare with — ← Mova's choice · ✓ the right answer · no support
  • 2. Tomatoes can't be grown in pots — no support
  • 3. It proves that talking works on every single plant — no support
  • 4. The tomatoes might be the wrong colour — 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 ✓

Lola puts one pot by the radio in a sunny window and one in a dark cupboard. The radio pot grows better. What can she conclude?

  • 1. Nothing about music, because she changed the light too — ← Mova's choice · ✓ the right answer · no support
  • 2. Music makes plants grow better — no support
  • 3. Radios give out plant food — no support
  • 4. Darkness makes plants hate the music, so they grow slower — 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 · ★★ · right ✓

Ben says, "Hot water ALWAYS freezes faster, my science club proved it once." What's the honest reply?

  • 1. One try isn't enough, and scientists still argue about it — ← Mova's choice · ✓ the right answer · score 7
  • 2. He's right, one try proves it forever — score 0
  • 3. He's wrong, hot water can never freeze before cold water does — score 0
  • 4. Only scientists are allowed to test it — score 6

Why: It took the question to ask which statement is true. It chose option 1 with score 7, against 6 for the next best. Its support: lesson 29, line 7: «The idea that hot water can freeze faster than cold is called the Mpemba effect, after a Tanzanian schoolboy who noticed it in 1963; scientists still argue abo…», reached through the same lesson line as the sentence the question matched. What matched: the same action «argue» (+5); the same doer «scientists» (+2). · the question and its options parsed, with trees and pragmatics

Test 4 · ★★ · right ✓

"bloody toast landed butter down AGAIN, it always does" What's true?

  • 1. Toast is magnetic on the buttered side — no support
  • 2. It never really happens, you imagine it — no support
  • 3. From table height it often does, because it turns about half a turn — ← Mova's choice · ✓ the right answer · score 6
  • 4. It's pure bad luck, there's no reason at all — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 6, the only option with support. Its support: lesson 29, line 8: «Toast falling off a table often turns about half a turn before it lands, so it lands butter side down quite often from table height; a scientist tested this wi…», reached through the same lesson line as the sentence the question matched. What matched: the same action «turn about» (+5); the same thing acted on «turn» (+1). · the question and its options parsed, with trees and pragmatics

Test 5 · ★★ · wrong ✗

Uncle Pete unplugs his phone at 80% and leaves it in a hot car all afternoon. Which habit is worse for the battery?

  • 1. Unplugging it when it hits 80% — ← Mova's choice · no support
  • 2. Charging it at night — no support
  • 3. Turning it off sometimes — no support
  • 4. Leaving it in the hot car — ✓ 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 6 · ★★ · right ✓

Leah's gran puts a spoon in the cola every time. How could they test the trick fairly?

  • 1. Two opened bottles, one with a spoon, one without, checked after a day — ← Mova's choice · ✓ the right answer · no support
  • 2. One bottle with a spoon, checked after a minute — no support
  • 3. Ask gran whether she thinks it works — no support
  • 4. Use a spoon in lemonade and a lid on cola — 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 ✓

Charlie drops a book and a flat sheet of paper; the book wins. Then he lays the paper flat on top of the book. What happens?

  • 1. The paper falls first and lands under the book — score 2
  • 2. The book falls slower because of the paper — score 4
  • 3. The paper flies off and floats away — no support
  • 4. They fall together, because the book shields the paper from air — ← Mova's choice · ✓ the right answer · score 6

Why: It took the question to ask what happens next. It chose option 4 with score 6, against 4 for the next best. Its support: lesson 29, line 13: «Without air in the way, heavy and light things fall at the same speed; on the Moon in 1971 an astronaut dropped a hammer and a feather and they landed together…», reached through what followed the sentence the question matched. What matched: the same doer «sheet» (+4); its «because» matches the remembered cause (+4). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 8 · ★★ · right ✓

In a cartoon, a cannonball smashes the floor while a feather drifts down, and a robot says gravity pulls the cannonball harder. What should he say instead?

  • 1. Air slows the feather; without air they'd fall together — ← Mova's choice · ✓ the right answer · score 15
  • 2. The feather is too clever to fall — no support
  • 3. Cannonballs have their own gravity — no support
  • 4. He's right, heavy things are always pulled down much faster — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 15, the only option with support. Its support: lesson 29, line 13: «Without air in the way, heavy and light things fall at the same speed; on the Moon in 1971 an astronaut dropped a hammer and a feather and they landed together…», reached through the same lesson line as the sentence the question matched. What matched: the same action «slow» (+5); the same doer «air» (+5); it fills the role the question asks for (+3); the same thing acted on «hammer» (+2). · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · wrong ✗

Josh says, "Seven folds, max, no one can ever do more." What's the clever reply?

  • 1. Folding paper is impossible after two — ← Mova's choice · no support
  • 2. With ordinary paper, yes, but a student folded a long strip 12 times — ✓ the right answer · no support
  • 3. You're right, eight folds would explode — no support
  • 4. Anyone can fold paper 100 times — 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 ✓

Dev guesses sugar dissolves faster in cold water. What's the best thing to do?

  • 1. Time a spoonful in cold and in warm water — ← Mova's choice · ✓ the right answer · no support
  • 2. Use boiling water and skip the cold one altogether — no support
  • 3. Tell him he's silly for guessing — no support
  • 4. Agree, because guesses are usually right — 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 11 · ★★ · right ✓

Ruby's coach says bananas stop cramp. What's fair to say?

  • 1. Bananas cause cramp, never eat them — score 2
  • 2. The coach is lying to sell bananas — no support
  • 3. Cramp only ever happens to people who refuse to eat bananas — no support
  • 4. Bananas are a good snack, but they don't really stop cramp — ← 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, against 2 for the next best. Its support: lesson 29, line 11: «A banana is a good snack, but it does not prevent cramp in sport for most people.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «banana» (+2); the same thing acted on «good snack» (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the principal characteristic of a fair test.

  • 1. A single trial is deemed sufficient — ← Mova's choice · no support
  • 2. Only one condition is varied whilst all others are held constant — ✓ the right answer · no support
  • 3. All conditions are varied simultaneously — no support
  • 4. The outcome is decided before the test is conducted — 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 ✓

Which of the following statements most accurately characterises the present scientific position concerning the more rapid freezing of warm water?

  • 1. The matter remains disputed among scientists — ← Mova's choice · ✓ the right answer · no support
  • 2. It has been conclusively disproven in all circumstances — no support
  • 3. It has been conclusively proven in all circumstances — no support
  • 4. It has never been investigated — 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 ✓

It is given that a hammer and a feather were released simultaneously upon the lunar surface in 1971. Select the response consistent with the established facts.

  • 1. Both objects reached the surface at the same moment — ← Mova's choice · ✓ the right answer · no support
  • 2. The feather did not descend at all — no support
  • 3. The hammer reached the surface considerably earlier — no support
  • 4. The feather reached the surface considerably earlier — 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 · right ✓

Ascertain the condition under which granulated sugar dissolves more rapidly.

  • 1. In water devoid of motion — no support
  • 2. In frozen water — no support
  • 3. In cold water — no support
  • 4. In warm water — ← 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 29, line 15: «Sugar dissolves (breaks up and vanishes into the water) faster in warm water than in cold, because the tiny particles of warm water move faster.», reached through the remembered sentence the question matched. What matched: the same place «warm water» (+3); the same property (+3). · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/myths/29-let-s-test-it-experiments-and-fair-tests/