Gravity

Tests: 5 of 13 right · Exam: 1 of 4 right · Kind: ★ · Understood: 11 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 6 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 · ★ · right ✓

A child in Australia drops a ball. Which way does it fall?

1. Up into the sky — no support
2. Sideways, towards the equator in the middle of the Earth — no support
3. Towards Europe — no support
4. Towards the ground, towards the Earth's centre — ← Mova's choice · ✓ the right answer · score 2

Why: It took the question to ask a circumstance (with what, when, how). It chose option 4 with score 2, the only option with support. Its support: lesson 6, line 2: «The Earth is so massive that its pull holds us on the ground and makes a dropped apple fall towards its centre, which is why «down» points to the middle of the…», 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 circumstance (+2). Against it: a different action (counts against) (-1); a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

If the Earth's gravity suddenly switched off, what would the Moon do?

1. Fall onto the Earth — ← Mova's choice · score 8
2. Stop and hang still — no support
3. Fly off in a straight line — ✓ the right answer · score 6
4. Go around the Earth faster — no support

Why: It took the question to ask what is done. It chose option 1 with score 8, against 6 for the next best. Its support: lesson 6, line 3: «The Moon is falling towards the Earth all the time, but it also moves sideways so fast that it keeps missing: like a ball whirled on a string, it goes round an…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same action «fall» (+4). Against it: a different doer (counts against) (-2). The right option, 3, scored 6. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

Which is true?

1. Light things fall faster than heavy ones — ← Mova's choice · no support
2. Heavy and light things fall equally fast when there is no air — ✓ the right answer · no support
3. Heavy things always fall faster, even when there is no air at all — no support
4. Nothing falls where there is no air — 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 4 · ★ · wrong ✗

Leo whirls a ball on a string around his head. What plays the part of the string for the Moon?

1. The Earth's gravity — ✓ the right answer · no support
2. The Earth's air — ← Mova's choice · score 4
3. The Moon's speed — no support
4. The Sun's light — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 4, the only option with support. Its support: lesson 6, line 3: «The Moon is falling towards the Earth all the time, but it also moves sideways so fast that it keeps missing: like a ball whirled on a string, it goes round an…», 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 «ball» (+2). Against it: a different action (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 ball is thrown sideways. Why does it curve down to the ground?

1. The air turns it downwards — no support
2. It gets tired of moving — no support
3. Gravity pulls it down while it moves sideways — ← Mova's choice · ✓ the right answer · score 1
4. The ground pulls it down with a kind of magnetism — no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 1, the only option with support. Its support: lesson 6, line 3: «The Moon is falling towards the Earth all the time, but it also moves sideways so fast that it keeps missing: like a ball whirled on a string, it goes round an…», reached through the same lesson line as the sentence the question matched. What matched: the same action «move» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

Why does the Earth go around the Sun and not around the Moon?

1. The Moon's light pushes the Earth away — score 4
2. The Moon has no gravity at all — no support
3. The Sun is nearer to the Earth than the Moon, so it pulls harder — ← Mova's choice · score 5
4. The Sun has far more mass, so its pull is far stronger — ✓ the right answer · no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 5, against 4 for the next best. Its support: lesson 2, line 5: «The seasons do not come from the Earth being nearer to or farther from the Sun: the Earth is in fact closest to the Sun in early January, in the northern winte…», reached through the option's own match among the sentences about the question's things. What matched: the same property (+2); the same circumstance (+2); the same light verb (be, have, do, get, go) (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

What would happen to the oceans if the Earth had no gravity?

1. They would freeze at once — ← Mova's choice · no support
2. Nothing would happen to them — no support
3. They would drift off into space — ✓ the right answer · no support
4. They would flow to the poles — 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 ✓

An astronaut floats inside the space station. Which is true?

1. There is no gravity where she is — no support
2. She has become weightless because she is so high above the ground — no support
3. Gravity still pulls her, but she is falling around the Earth — ← Mova's choice · ✓ the right answer · score 3
4. The station is held up by air — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 3, the only option with support. Its support: lesson 6, line 18: «Gravity works in space too; astronauts float because they are falling around the Earth together with their ship.», reached through a sentence linked to the one the question matched. What matched: the same action «fall» (+2); the same place «earth» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · wrong ✗

Two balls of the same size, one of steel and one of rubber, are dropped from a low wall. What happens?

1. The steel ball lands much sooner — ← Mova's choice · score 4
2. The rubber ball floats upward — score 4
3. They land almost together — ✓ the right answer · score 4
4. The rubber ball lands much sooner — score 4

Why: It took the question to ask what happens next. It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 5, line 11: «When you look at a far star, you see light that left it long ago, so you see the star as it was when that light set off.», reached through what followed the sentence the question matched. What matched: the same doer «star» (+4). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

why don't people at the bottom of the world fall off

1. They really are upside down and need belts to hold them on — ← Mova's choice · no support
2. Gravity pulls everyone towards the Earth's centre — ✓ the right answer · no support
3. The air pushes them against the ground — no support
4. They hold on because the ground is sticky — 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 11 · ★ · wrong ✗

drop a hammer n a feather on the moon, which lands first

1. The hammer, coz heavy things always fall faster than light ones — no support
2. Neither, nothing falls on the Moon — ← Mova's choice · score 3
3. The feather, it floats down faster without air — no support
4. Both land together, there's no air to slow the feather — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 2 with score 3, the only option with support. Its support: lesson 3, line 1: «The Moon is a ball of rock that goes around the Earth about once a month; it makes no light of its own and shines only because sunlight falls on it.», reached through the option's own match among the sentences about the question's things. What matched: the same action «fall» (+2); the same place «moon» (+2). Against it: a different doer (counts against) (-1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 12 · ★ · right ✓

my brother says there's no gravity in space, that's why astronauts float. true?

1. Yes, gravity stops where the air ends — no support
2. No, they float because they're falling around the Earth with their ship — ← Mova's choice · ✓ the right answer · score 12
3. Yes, space has no gravity at all — no support
4. No, they float because their suits are filled with air to keep them up — score 8

Why: It took the question to ask which statement is true. It chose option 2 with score 12, against 8 for the next best. Its support: lesson 6, line 18: «Gravity works in space too; astronauts float because they are falling around the Earth together with their ship.», reached through the remembered sentence the question matched. What matched: the same action «float» (+4); the same doer «astronauts» (+4); its «because» matches the remembered cause (+4). · the question and its options parsed, with trees and pragmatics

Test 13 · ★ · right ✓

Mia reckons heavy stuff always falls faster than light stuff. right?

1. No, without air they fall at the same speed — ← Mova's choice · ✓ the right answer · score 12
2. Yes, twice as heavy falls twice as fast — no support
3. Yes, that's why a feather falls slowly — score 10
4. No, light things always fall faster — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 12, against 10 for the next best. Its support: lesson 6, line 13: «Without air, light and heavy objects fall at the same speed.», reached through the remembered sentence the question matched. What matched: the same action «fall» (+4); the same place «same speed» (+4); the same circumstance (+4). · 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 quantity designated as weight?

1. The volume an object occupies — ← Mova's choice · no support
2. The quantity of matter an object contains — no support
3. The force exerted by gravity upon an object — ✓ the right answer · no support
4. The density of the material of an object — 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 · wrong ✗

Identify the principal agency by which the planets are retained in their orbits.

1. The friction of interplanetary air — ← Mova's choice · no support
2. The pressure of the solar wind — no support
3. The gravitational attraction of the Sun — ✓ the right answer · no support
4. The magnetism of the Earth — 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 ✗

It is given that a hammer and a feather are released simultaneously in the absence of air. Determine the outcome.

1. The hammer descends considerably more rapidly — ← Mova's choice · no support
2. The feather descends considerably more rapidly — no support
3. Both descend at an identical rate — ✓ the right answer · no support
4. Neither descends, gravity being absent — 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 ✓

Select the response that is consistent with the established facts concerning astronauts in orbit about the Earth.

1. They float because the Moon draws them upward — score 4
2. They float because gravity is wholly absent at such a distance from the Earth — score 4
3. They float because they and their vessel are falling about the Earth together — ← Mova's choice · ✓ the right answer · score 6
4. They float because the vessel is lighter than air — score 4

Why: It took the question to ask which statement is true. It chose option 3 with score 6, against 4 for the next best. Its support: lesson 6, line 18: «Gravity works in space too; astronauts float because they are falling around the Earth together with their ship.», reached through the option's own match among the sentences about the question's things. What matched: the same action «float» (+2); the same doer «astronauts» (+2); its «because» matches the remembered cause (+2). · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/6-gravity/