--- title: Galaxies and the Big Bang — how Mova does on the tests · Space description: Lesson 24 of the space course of Mova's primary school: 3 of 11 tests right, exam 2 of 4, every question with the options, the student's choice, the right answer and why it chose. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/school-run/space/24-galaxies-and-the-big-bang/) [home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [Space](https://md.mova.elamur.ai/free/en/school-run/space/) / 24 # Galaxies and the Big Bang **Tests:** 3 of 11 right · **Exam:** 2 of 4 right · **Kind:** ★ · **Understood:** 9 of 15 · **Run:** 2026-10-18, commit `f3c23ea72` Lesson 24 of the space 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/space/24-galaxies-and-the-big-bang/). 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/space/24-galaxies-and-the-big-bang/). ### Test 1 · ★ · wrong ✗ {#t1} Sam says "the Big Bang was a massive explosion in one spot in empty space". What is right? - **1.** It was two galaxies crashing — no support - **2.** It was all of space stretching at once, everywhere — **✓ the right answer** · no support - **3.** It was the Sun exploding and throwing out all the planets — no support - **4.** He is right, it was one bomb in the middle — **← Mova's choice** · score 4 **Why:** It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 24, line 5: «The Big Bang was not a bomb going off in one spot, but all of space stretching at once, everywhere, and still stretching today.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «big bang» (+4); the same thing acted on «bomb» (+2); the same light verb (be, have, do, get, go) (+1). Against it: one says «not», the other does not (counts against) (-3). The right option, 2, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t1/) ### Test 2 · ★ · right ✓ {#t2} In a rising raisin cake, which raisins move apart from each other fastest? - **1.** The ones farthest apart — **← Mova's choice** · **✓ the right answer** · score 6 - **2.** They all stay still — score 4 - **3.** Only the ones on top — score 6 - **4.** The ones closest together — score 6 **Why:** It took the question to ask who or what does it. 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 24, line 2: «Now we know there are hundreds of billions of galaxies, and they are all moving apart: the farther away a galaxy is, the faster it goes.», reached through the remembered sentence the question matched. What matched: the same action «move» (+4); the same property (+3). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t2/) ### Test 3 · ★ · wrong ✗ {#t3} If the universe is expanding, what was it like long ago? - **1.** Bigger and colder — **← Mova's choice** · no support - **2.** Smaller, hotter and denser — **✓ the right answer** · no support - **3.** Empty of all space — no support - **4.** Exactly as it is now — 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t3/) ### Test 4 · ★ · wrong ✗ {#t4} Which is true? - **1.** The Sun made all the gold that we dig up here on Earth — **← Mova's choice** · no support - **2.** Your body contains elements made in stars — **✓ the right answer** · no support - **3.** Stars make only hydrogen and nothing heavier than that — no support - **4.** All the elements were made in the Big Bang, all at once — 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t4/) ### Test 5 · ★ · wrong ✗ {#t5} Hubble pointed at an "empty" dark patch and found thousands of galaxies. What does this show? - **1.** That dark patch is the very edge of space, where it all stops — **← Mova's choice** · no support - **2.** Dark parts of the sky are empty, and the camera made a mistake — no support - **3.** Galaxies only exist in that one small patch and nowhere else — no support - **4.** The universe is crowded with galaxies everywhere — **✓ 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t5/) ### Test 6 · ★ · wrong ✗ {#t6} my mate says dark matter is just space dust lol. is it - **1.** No, nobody yet knows what dark matter is — **✓ the right answer** · score 4 - **2.** No, it is made only of black holes, which we know well — **← Mova's choice** · score 6 - **3.** Yes, it is just grey space dust drifting between stars — no support - **4.** Yes, it is the black smoke that comes off burning stars — no support **Why:** It took the question to ask which statement is true. It chose option 2 with score 6, against 4 for the next best. Its support: lesson 24, line 18: «Nobody yet knows what dark matter is made of.», reached through the remembered sentence the question matched. What matched: the same action «make» (+3); the same thing acted on «dark matter» (+3). The right option, 1, scored 4. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t6/) ### Test 7 · ★ · wrong ✗ {#t7} Why does a very distant galaxy show us the young universe? - **1.** Old galaxies glow younger colours — no support - **2.** Telescopes can see into the future as well as the past — **← Mova's choice** · score 5 - **3.** Its light has travelled for billions of years — **✓ the right answer** · no support - **4.** Distant galaxies are made of baby stars only — score 4 **Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 5, against 4 for the next best. Its support: lesson 24, line 15: «The James Webb Space Telescope has seen galaxies as they were only about 300 million years after the Big Bang.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «james space telescope» (+3); the same action «see» (+2). The right option, 3, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t7/) ### Test 8 · ★ · right ✓ {#t8} In a cartoon, someone stands safely outside the universe watching the Big Bang go off. What is wrong? - **1.** There was no outside: all of space itself was stretching — **← Mova's choice** · **✓ the right answer** · no support - **2.** The Big Bang was much too quiet and dark for anyone to watch — no support - **3.** The Big Bang happened on Earth — no support - **4.** Nothing, that is how it was — 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t8/) ### Test 9 · ★ · wrong ✗ {#t9} If a galaxy were twice as far away as another, how would its speed away from us compare? - **1.** It would move away half as fast — score 7 - **2.** It would come towards us — **← Mova's choice** · score 8 - **3.** It would move away about twice as fast — **✓ the right answer** · score 7 - **4.** It would not move at all — score 3 **Why:** It took the question to ask what something is like. It chose option 2 with score 8, against 7 for the next best. Its support: lesson 23, line 15: «The Large and Small Magellanic Clouds are two small galaxies near ours, seen as misty patches in the southern sky.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «large magellanic clouds» (+4); the same circumstance (+4). The right option, 3, scored 7. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t9/) ### Test 10 · ★ · right ✓ {#t10} How were Penzias and Wilson surprised by their discovery? - **1.** They found the radiation by accident, as a puzzling hiss — **← Mova's choice** · **✓ the right answer** · score 6 - **2.** They saw it with their own eyes — no support - **3.** They had been searching for it on purpose for over 50 years — no support - **4.** Hubble told them where to look — no support **Why:** It took the question to ask what something is like. It chose option 1 with score 6, the only option with support. Its support: lesson 24, line 13: «The universe is filled with faint microwave radiation left from the Big Bang, discovered by accident in 1965 by Arno Penzias and Robert Wilson, who at first he…», reached through the same lesson line as the sentence the question matched. What matched: the same action «discover» (+2); the same thing acted on «faint microwave radiation» (+2); the same circumstance (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t10/) ### Test 11 · ★ · wrong ✗ {#t11} why don't galaxies fly apart if they spin so fast - **1.** Astronomers think dark matter's gravity holds them — **✓ the right answer** · score 4 - **2.** They are glued together by the light that shines between stars — score 5 - **3.** They spin slowly really, much slower than it looks in photos — **← Mova's choice** · score 7 - **4.** The black hole in the middle pulls every star in towards it — no support **Why:** It took the question to ask which statement is true. It chose option 3 with score 7, against 5 for the next best. Its support: lesson 2, line 7: «As the cloud collapsed it spun faster and flattened into a disc, which is why the planets orbit in nearly the same flat plane.», reached through the remembered sentence the question matched. What matched: the same doer «cloud» (+4); the same action «spin» (+3). The right option, 1, scored 4. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/t11/) ### Exam question 1 · formal language · right ✓ {#e1} Which of the following statements most accurately characterises the Big Bang theory? - **1.** The universe originated as an explosion at a single point situated in empty space — no support - **2.** The universe has remained unchanged in size throughout its existence — score 5 - **3.** The universe was formerly hot and dense and has since expanded and cooled — **← Mova's choice** · **✓ the right answer** · score 7 - **4.** The universe was formed by the explosion of the Sun — no support **Why:** It took the question to ask who or what does it. It chose option 3 with score 7, against 5 for the next best. Its support: lesson 24, line 11: «About 13.8 billion years ago the universe was extremely hot and dense, and it has been expanding and cooling ever since; this is the Big Bang theory.», 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 «universe» (+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/space/24-galaxies-and-the-big-bang/e1/) ### Exam question 2 · formal language · wrong ✗ {#e2} Ascertain the approximate age of the universe according to the Big Bang theory. - **1.** About thirteen point eight million years — **← Mova's choice** · no support - **2.** About thirteen point eight billion years — **✓ the right answer** · no support - **3.** About four point six billion years — no support - **4.** About six thousand years — 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/e2/) ### Exam question 3 · formal language · right ✓ {#e3} Identify the person who demonstrated in 1923-1924 that the Andromeda nebula was a separate galaxy. - **1.** Edwin Hubble — **← Mova's choice** · **✓ the right answer** · no support - **2.** Arno Penzias — no support - **3.** Galileo Galilei — no support - **4.** Isaac Newton — 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](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/e3/) ### Exam question 4 · formal language · wrong ✗ {#e4} Select the response that is consistent with the established facts concerning the motion of distant galaxies. - **1.** The more distant a galaxy, the faster it recedes — **✓ the right answer** · no support - **2.** All galaxies approach the Milky Way — **← Mova's choice** · score 7 - **3.** All galaxies are at rest relative to one another — no support - **4.** The nearer a galaxy, the faster it recedes — 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 23, line 15: «The Large and Small Magellanic Clouds are two small galaxies near ours, seen as misty patches in the southern sky.», reached through the remembered sentence the question matched. What matched: the same doer «large magellanic clouds» (+4); the same thing acted on «two small galaxies» (+3). The right option, 1, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/space/24-galaxies-and-the-big-bang/e4/) - ← previous: [23. The Milky Way](https://md.mova.elamur.ai/free/en/school-run/space/23-the-milky-way/) - next →: [25. Black holes](https://md.mova.elamur.ai/free/en/school-run/space/25-black-holes/) - ↑ back to [Space](https://md.mova.elamur.ai/free/en/school-run/space/)