Rockets, satellites and astronauts

Tests: 4 of 13 right · Exam: 2 of 4 right · Kind: ★★ · Understood: 12 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 71 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 ✗

A balloon is blown up and let go, and it shoots across the room. How is this like a rocket?

1. Both burn fuel to fly — ← Mova's choice · no support
2. Both are pulled along by the wind — no support
3. Both are pushed forward by gas rushing out of the back — ✓ the right answer · no support
4. Both are lifted because they are lighter than the air around them — 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 ✓

If a satellite slowed down a lot, what would happen?

1. It would fly further and further away from the Earth into space — no support
2. It would fall lower and could drop into the air and burn up — ← Mova's choice · ✓ the right answer · score 5
3. It would start to go faster and faster by itself, all on its own — score 5
4. It would stay in exactly the same place up in the sky forever — score 5

Why: It took the question to ask which statement is true. It chose option 2 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 71, line 3: «A satellite stays up because it moves sideways very fast, about 8 kilometres every second; it keeps falling towards the Earth, but the curved ground falls away…», reached through the remembered sentence the question matched. What matched: the same action «fall» (+3); the same doer «satellite» (+2). · the question and its options parsed, with trees and pragmatics

Test 3 · ★★ · wrong ✗

Why could a jet plane not fly to the Moon?

1. The Moon is too close for a plane — no support
2. Planes are too small to see the Moon — ← Mova's choice · score 3
3. Its engines need air, and space has none — ✓ the right answer · score 1
4. Planes cannot fly at night, when the Moon is out — score 3

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 3, line 3: «When the Moon is between the Earth and the Sun, its lit half faces away from us and we see a new moon; when the Moon is on the far side of the Earth from the S…», reached through the option's own match among the sentences about the question's things. What matched: the same action «see» (+2); the same thing acted on «new moon» (+2). Against it: a different doer (counts against) (-1). The right option, 3, scored 1. · the question and its options parsed, with trees and pragmatics

Test 4 · ★★ · wrong ✗

An astronaut on the space station says she saw the Sun rise many times today. Why?

1. She was looking at different stars — ← Mova's choice · score 3
2. The station goes around the Earth every 90 minutes — ✓ the right answer · no support
3. The Sun moves faster near space — score 3
4. Clouds kept hiding and then showing the Sun again and again — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 1, line 4: «The Sun seems to rise in the east and set in the west because the Earth turns from west to east, the way trees seem to run backwards when you look out of a mov…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «sun» (+2); the same action «seem» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 5 · ★★ · wrong ✗

A sailor in the middle of the ocean knows exactly where his ship is. What most likely helps him?

1. The direction of the waves around them — ← Mova's choice · score 7
2. The shape of the clouds in the sky above — no support
3. Signals from navigation satellites — ✓ the right answer · no support
4. The colour of the sea under the ship — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 7, the only option with support. Its support: lesson 57, line 4: «We can help by the three Rs: Reduce (use less), Reuse (use things again) and Recycle (turn old materials into new things). Recycling an aluminium can saves mos…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+4); the same thing acted on «things» (+3). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 6 · ★★ · wrong ✗

Which order of events is right?

1. The Moon walk, then the first satellite, then the first person in space — ← Mova's choice · no support
2. The first person in space, then the Moon walk, then the first satellite — no support
3. The first satellite, then the first person in space, then the Moon walk — ✓ the right answer · no support
4. The first satellite, then the Moon walk, then the first person in space — 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 ✗

An astronaut comes home after six months in space. Why might she need help to walk at first?

1. The Earth's gravity grew stronger while she was away — ← Mova's choice · no support
2. Her spacesuit is still too heavy — no support
3. Her muscles and bones grew weaker in space — ✓ the right answer · no support
4. She forgot how to walk — 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 · ★★ · wrong ✗

A ball thrown sideways from a very high tower lands far away. If it could be thrown fast enough, with no air in the way, what would happen?

1. It would stop in mid-air — no support
2. It would land right at the foot of the tower — no support
3. It would fly straight up into space — ← Mova's choice · score 4
4. It would fall all the way around the Earth — ✓ the right answer · score 3

Why: It took the question to ask which statement is true. It chose option 3 with score 4, against 3 for the next best. Its support: lesson 54, line 3: «Sound needs something to travel through: air, water or solids such as wood and metal. In space there is no air, so there is no sound — astronauts talk by radio.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «air» (+2); the same place «space» (+2). The right option, 4, scored 3. · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · wrong ✗

Why is a rocket launched with an enormous amount of fuel?

1. The fuel is used to make air on the Moon — no support
2. Rockets are made heavier on purpose — ← Mova's choice · score 4
3. Fuel keeps the astronauts warm — no support
4. It must lift its own heavy weight and reach a huge speed — ✓ the right answer · no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, the only option with support. Its support: lesson 71, line 2: «Fuel needs oxygen to burn, and there is no air in space, so a rocket carries its own oxygen as well as its fuel. Big rockets are built in stages, and each empt…», 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 «rocket» (+2). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · ★★ · right ✓

why do astronauts on the space station gotta work out every day

1. Muscles and bones weaken in space, so they exercise about two hours a day — ← Mova's choice · ✓ the right answer · score 3
2. It keeps them warm, since space is very cold — no support
3. Exercise keeps the station spinning the right way — no support
4. There is too much food on board, so they need to burn it off — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 38, line 13: «Astronauts exercise every day in space to keep their muscles and bones strong.», reached through the remembered sentence the question matched. What matched: the same action «exercise» (+3); the same property (+2). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 11 · ★★ · wrong ✗

who went up into space first

1. Sputnik's pilot, in 1957 — ← Mova's choice · no support
2. Neil Armstrong, in 1969 — no support
3. Yuri Gagarin, in 1961 — ✓ the right answer · no support
4. Buzz Aldrin, in 1957 — 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 12 · ★★ · right ✓

Leo says satellites stay up cos there's no gravity up there. true?

1. Yes, gravity stops a little way above the clouds — no support
2. Yes, but only above the Moon — no support
3. No, satellites stay up because they hang from strong cables — score 9
4. No, a satellite is falling around the Earth while moving sideways fast — ← Mova's choice · ✓ the right answer · score 10

Why: It took the question to ask which statement is true. It chose option 4 with score 10, against 9 for the next best. Its support: lesson 71, line 3: «A satellite stays up because it moves sideways very fast, about 8 kilometres every second; it keeps falling towards the Earth, but the curved ground falls away…», reached through the same lesson line as the sentence the question matched. What matched: the same action «fall» (+4); the same doer «satellite» (+4); the same place «earth» (+2). · the question and its options parsed, with trees and pragmatics

Test 13 · ★★ · right ✓

my brother reckons rockets push on the air to fly. right?

1. No, the rocket pushes hot gas backwards and the gas pushes it forwards — ← Mova's choice · ✓ the right answer · score 8
2. No, rockets are pulled up by the Sun — no support
3. Yes, the rocket pushes off the air below it — no support
4. Yes, so rockets cannot fly at all once they reach space where there is no air — score 4

Why: It took the question to ask which statement is true. It chose option 1 with score 8, against 4 for the next best. Its support: lesson 71, line 6: «A rocket pushes hot gas backwards, and the gas pushes the rocket forwards.», reached through the remembered sentence the question matched. What matched: the same action «push» (+3); the same doer «rocket» (+2); the same property (+2); the same thing acted on «hot gas» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Which of the following statements most accurately characterises the propulsion of a rocket?

1. It is lifted by wings as an aeroplane is lifted — no support
2. It pushes hot gas backwards, and the gas pushes the rocket forwards — ← Mova's choice · ✓ the right answer · score 12
3. It is drawn upwards by the gravity of the Moon — no support
4. It pushes against the air beneath it, which lifts it upwards — score 4

Why: It took the question to ask who or what does it. It chose option 2 with score 12, against 4 for the next best. Its support: lesson 71, line 6: «A rocket pushes hot gas backwards, and the gas pushes the rocket forwards.», reached through the remembered sentence the question matched. What matched: the same action «push» (+4); the same thing acted on «rocket» (+4); the same property (+2); it fills the role the question asks for (+2). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Identify the principal reason for which a rocket carries its own oxygen.

1. There is no air in space — ✓ the right answer · no support
2. Oxygen is required for the astronauts' food alone — ← Mova's choice · score 6
3. Oxygen protects the rocket from heat — no support
4. Oxygen renders the rocket lighter — score 1

Why: It took the question to ask which statement is true. It chose option 2 with score 6, against 1 for the next best. Its support: lesson 71, line 2: «Fuel needs oxygen to burn, and there is no air in space, so a rocket carries its own oxygen as well as its fuel. Big rockets are built in stages, and each empt…», reached through the same lesson line as the sentence the question matched. What matched: the same action «need» (+4); the same thing acted on «oxygen» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Ascertain the person who became the first in space, together with the year thereof.

1. Yuri Gagarin, in 1957 — ← Mova's choice · no support
2. Neil Armstrong, in 1969 — no support
3. Yuri Gagarin, in 1961 — ✓ the right answer · no support
4. Buzz Aldrin, in 1957 — 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 a satellite in orbit.

1. It rests upon the top of the atmosphere — no support
2. It floats because there is no gravity in space — no support
3. It is held aloft by its engines continuously — no support
4. It falls around the Earth whilst moving sideways very fast — ← Mova's choice · ✓ the right answer · score 2

Why: It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 71, line 10: «A satellite in orbit is falling around the Earth while it moves sideways very fast.», reached through the option's own match among the sentences about the question's things. What matched: the same place «earth» (+2); the same action «fall» (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

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