---
title: The solar system and the planets — how Mova does on the tests · World
description: Lesson 4 of the world course of Mova's primary school: 8 of 13 tests right, exam 0 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/school-run/world/4-the-solar-system/)

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# The solar system and the planets

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**Tests:** 8 of 13 right · **Exam:** 0 of 4 right · **Kind:** plain · **Understood:** 8 of 17 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 4 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](https://md.mova.elamur.ai/free/en/corpora/school/world/4-the-solar-system/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/).

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### Test 1 · wrong ✗ {#t1}

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A rocket leaves the Earth and flies outward. Which planet could it pass first?

- **1.** Mercury — **← Mova's choice** · score 5
- **2.** Mars — **✓ the right answer** · score 5
- **3.** Saturn — score 5
- **4.** Venus — score 5

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**Why:** It took the question to ask who or what does it. It chose option 1 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 4, line 2: «In order from the Sun the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune: a way to remember them is «My Very Easy Method Just Spe…», 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 «mercury» (+2). The right option, 2, scored 5. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t1/)

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### Test 2 · wrong ✗ {#t2}

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Which is true?

- **1.** Mercury takes the longest to go around the Sun — **← Mova's choice** · no support
- **2.** A year on Mercury is shorter than a year on the Earth — **✓ the right answer** · no support
- **3.** All planets have years of the same length — no support
- **4.** A year on Neptune is shorter than a year on the Earth — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t2/)

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### Test 3 · right ✓ {#t3}

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Which group are all giant planets?

- **1.** Jupiter, Saturn, Uranus, Neptune — **← Mova's choice** · **✓ the right answer** · score 14
- **2.** Pluto, Neptune, Venus, Uranus — score 14
- **3.** Jupiter, Mars, Saturn, Earth — score 14
- **4.** Earth, Mars, Venus, Mercury — score 14

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**Why:** It took the question to ask who or what does it. It chose option 1 with score 14, tied with another option at 14 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 4, line 12: «Jupiter, Saturn, Uranus and Neptune are giant planets with no solid surface.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+5); the same doer «jupiter» (+4); the same light verb (be, have, do, get, go) (+3); the same thing acted on «giant planets» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t3/)

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### Test 4 · right ✓ {#t4}

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A girl says the closest planet to the Sun must be the hottest. Why is she wrong?

- **1.** The Sun does not warm the planets — no support
- **2.** Neptune is the hottest planet — score 5
- **3.** Mercury is the farthest planet — score 5
- **4.** Venus is hotter because its thick air holds heat — **← Mova's choice** · **✓ the right answer** · score 7

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**Why:** It took the question to ask why something happens (its cause). It chose option 4 with score 7, against 5 for the next best. Its support: lesson 4, line 13: «Venus is the hottest planet, because its thick air traps heat.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «venus» (+2); the same property (+2); its «because» matches the remembered cause (+2); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t4/)

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### Test 5 · wrong ✗ {#t5}

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If you made a model with the Sun as a football, how big would the Earth be?

- **1.** Like a grain of dust far smaller than sand — **← Mova's choice** · score 6
- **2.** Like a peppercorn — **✓ the right answer** · score 6
- **3.** Like a beach ball — score 6
- **4.** Like a tennis ball — score 6

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**Why:** It took the question to ask what something is like. 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 1, line 9: «The Sun does not go around the Earth to make day and night.», reached through the remembered sentence the question matched. What matched: the same action «make» (+4); the same circumstance (+4). Against it: a different doer (counts against) (-2). The right option, 2, scored 6. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t5/)

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### Test 6 · right ✓ {#t6}

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Which planet is between Venus and Mars?

- **1.** Earth — **← Mova's choice** · **✓ the right answer** · score 14
- **2.** Saturn — score 8
- **3.** Jupiter — score 8
- **4.** Mercury — score 14

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**Why:** It took the question to ask who or what does it. It chose option 1 with score 14, tied with another option at 14 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 4, line 11: «Mercury, Venus, Earth and Mars are small rocky planets.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+5); the same doer «mercury» (+4); the same light verb (be, have, do, get, go) (+3); the same circumstance (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t6/)

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### Test 7 · wrong ✗ {#t7}

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How many planets are farther from the Sun than the Earth?

- **1.** Three — **← Mova's choice** · score 12
- **2.** Two — score 12
- **3.** Five — **✓ the right answer** · score 12
- **4.** Seven — score 12

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**Why:** It took the question to ask what it is done to. It chose option 1 with score 12, tied with another option at 12 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 4, line 4: «The farther a planet is from the Sun, the longer its year: Mercury goes around in 88 days, but Neptune needs about 165 of our years.», reached through the remembered sentence the question matched. What matched: the same doer «planet» (+4); the same place «sun» (+4); the same property (+2); the same light verb (be, have, do, get, go) (+2). The right option, 3, scored 12. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t7/)

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### Test 8 · right ✓ {#t8}

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A space probe lands on a planet with a red, dusty, rocky ground. Where is it?

- **1.** On Mars — **← Mova's choice** · **✓ the right answer** · no support
- **2.** On Neptune — no support
- **3.** On Saturn — no support
- **4.** On Jupiter — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t8/)

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### Test 9 · right ✓ {#t9}

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Why is Pluto no longer counted among the planets?

- **1.** It is a small dwarf planet among many like it — **← Mova's choice** · **✓ the right answer** · no support
- **2.** It moved out of the solar system — no support
- **3.** It has fallen into the Sun — no support
- **4.** It was found to be a star — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t9/)

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### Test 10 · wrong ✗ {#t10}

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which planet's the biggest one again

- **1.** Neptune — **← Mova's choice** · no support
- **2.** Jupiter — **✓ the right answer** · no support
- **3.** Saturn — no support
- **4.** Earth — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t10/)

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### Test 11 · right ✓ {#t11}

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how come mars looks kinda red

- **1.** Its dust has rust in it — **← Mova's choice** · **✓ the right answer** · no support
- **2.** It is the hottest planet — no support
- **3.** It is the closest planet to the Sun — no support
- **4.** It is covered in red lava — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t11/)

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### Test 12 · right ✓ {#t12}

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Tom says Mercury's the hottest planet cos it's closest to the Sun. true?

- **1.** Yes, the closest planet must be the hottest — no support
- **2.** No, Venus is hottest because its thick air traps heat — **← Mova's choice** · **✓ the right answer** · score 6
- **3.** Yes, Mercury is hotter than all the others by far — no support
- **4.** No, Jupiter is hottest because it is biggest — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 6, the only option with support. Its support: lesson 4, line 13: «Venus is the hottest planet, because its thick air traps heat.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «venus» (+2); its «because» matches the remembered cause (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t12/)

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### Test 13 · right ✓ {#t13}

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my cousin says there's nine planets, Pluto too. right?

- **1.** No, there are eight; Pluto is a dwarf planet — **← Mova's choice** · **✓ the right answer** · score 5
- **2.** Yes, nine, but Pluto is the first one — no support
- **3.** No, there are ten if you count the Moon — no support
- **4.** Yes, nine, and Pluto is the ninth — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 5, the only option with support. Its support: lesson 4, line 16: «Pluto is a dwarf planet, not one of the eight planets: it is small, and many other small icy worlds like it go around the Sun far out beyond Neptune.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «pluto» (+2); the same thing acted on «dwarf planet» (+2); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/t13/)

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### Exam question 1 · formal language · wrong ✗ {#e1}

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State the number of bodies presently classified as planets within the solar system.

- **1.** Ten — **← Mova's choice** · no support
- **2.** Nine — no support
- **3.** Seven — no support
- **4.** Eight — **✓ the right answer** · no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/e1/)

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### Exam question 2 · formal language · wrong ✗ {#e2}

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Identify, from among the following, the planet of greatest dimensions.

- **1.** Neptune — **← Mova's choice** · no support
- **2.** Saturn — no support
- **3.** Jupiter — **✓ the right answer** · no support
- **4.** Earth — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Identify the principal reason for which Venus possesses the highest surface temperature of all the planets.

- **1.** It rotates with exceptional rapidity — **← Mova's choice** · no support
- **2.** It is the planet nearest the Sun — no support
- **3.** Its dense atmosphere retains heat — **✓ the right answer** · no support
- **4.** It is composed chiefly of molten metal — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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Select the response that is consistent with the established facts concerning the present classification of Pluto.

- **1.** It is designated a moon of Neptune — **← Mova's choice** · no support
- **2.** It is designated a star — no support
- **3.** It is designated a dwarf planet — **✓ the right answer** · no support
- **4.** It is designated the ninth planet — no support

<!-- .why -->
**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](https://md.mova.elamur.ai/free/en/corpora/questions/world/4-the-solar-system/e4/)

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- ← previous: [3. The Moon and its phases](https://md.mova.elamur.ai/free/en/school-run/world/3-the-moon-and-its-phases/)
- next →: [5. The Sun as a star and the stars](https://md.mova.elamur.ai/free/en/school-run/world/5-the-sun-and-the-stars/)
- ↑ back to [World](https://md.mova.elamur.ai/free/en/school-run/world/)