--- title: Migration: the great journeys — how Mova does on the tests · Biology description: Lesson 54 of the biology course of Mova's primary school: 5 of 12 tests right, exam 1 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/biology/54-migration-the-great-journeys/) [home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/) / 54 # Migration: the great journeys **Tests:** 5 of 12 right · **Exam:** 1 of 4 right · **Kind:** ★★ · **Understood:** 8 of 16 · **Run:** 2026-10-18, commit `f3c23ea72` Lesson 54 of the biology 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/biology/54-migration-the-great-journeys/). 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/biology/54-migration-the-great-journeys/). ### Test 1 · ★★ · wrong ✗ {#t1} in the cartoon the birds pack suitcases and read a map going south lol. how do they really know the way - **1.** A leader bird has been to a special school for it and teaches the rest — score 2 - **2.** Sun, stars, landmarks, smells and magnetism, and some of it is inborn — **✓ the right answer** · no support - **3.** They just follow the nearest motorway — no support - **4.** They fly anywhere until it feels warm — **← Mova's choice** · score 3 **Why:** It took the question to ask which statement is true. It chose option 4 with score 3, against 2 for the next best. Its support: lesson 54, line 16: «Young cuckoos are raised by other birds and fly to Africa alone, so the route must be inborn; trackers showed cuckoos crossing the Sahara in one flight lasting…», reached through the option's own match among the sentences about the question's things. What matched: the same action «fly» (+2); the same doer «other birds» (+1). 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/biology/54-migration-the-great-journeys/t1/) ### Test 2 · ★★ · right ✓ {#t2} Grandad says swallows hide in the mud at the bottom of ponds over winter. Right? - **1.** No, that old myth was cleared up by ringing: they fly to Africa — **← Mova's choice** · **✓ the right answer** · score 8 - **2.** No, they sleep in barns all winter — score 4 - **3.** Yes, but only the young ones — no support - **4.** Yes, they breathe through their feathers in the mud until spring comes — no support **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 33, line 15: «Swallows from Britain fly about 10,000 km to South Africa for the winter, because a British winter has almost no flying insects for them to eat, and South Afri…», reached through the remembered sentence the question matched. What matched: the same receiver «south africa» (+4); the same action «fly» (+2); the same doer «swallows» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/54-migration-the-great-journeys/t2/) ### Test 3 · ★★ · wrong ✗ {#t3} Why would a bird want two summers a year instead of one? - **1.** Summer air is lighter to fly in, so the journey is easier both ways — no support - **2.** Summer gives long days and plenty of food, so it can feed all year — **✓ the right answer** · no support - **3.** It hates the colour of snow — no support - **4.** It does not, terns are just lost — **← Mova's choice** · score 2 **Why:** It took the question to ask why something happens (its cause). It chose option 4 with score 2, the only option with support. Its support: lesson 2, line 12: «A toucan's huge beak is light because it is a honeycomb of bone covered with keratin; it reaches fruit on thin twigs and also lets the bird lose heat, like a r…», reached through the option's own match among the sentences about the question's things. What matched: the same action «lose» (+2); the same doer «bird» (+2). Against it: a different thing acted on (counts against) (-2). 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/biology/54-migration-the-great-journeys/t3/) ### Test 4 · ★★ · right ✓ {#t4} An arctic tern that lives 30 years flies about 70000 km a year. About how far is that in its life? - **1.** About 2 million km — **← Mova's choice** · **✓ the right answer** · no support - **2.** About 30000 km — no support - **3.** About 2000 km — no support - **4.** About 70000 km — 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/biology/54-migration-the-great-journeys/t4/) ### Test 5 · ★★ · right ✓ {#t5} How could a fish remember the smell of one river after years in the ocean? - **1.** It reads the river's name on the signs by the bridges as it swims up — no support - **2.** It learned the smell when young, and its sense of smell is very good — **← Mova's choice** · **✓ the right answer** · score 4 - **3.** It follows other fish that have a map — no support - **4.** It never left the river at all — no support **Why:** It took the question to ask what something is like. It chose option 2 with score 4, the only option with support. Its support: lesson 21, line 12: «Elephants have a superb sense of smell and more smell genes than dogs, and lift the trunk to catch scents on the wind.», reached through the option's own match among the sentences about the question's things. What matched: the same action «sense» (+4). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/54-migration-the-great-journeys/t5/) ### Test 6 · ★★ · wrong ✗ {#t6} A monarch flies to a Mexican forest where it has never been. How can that be? - **1.** It follows the smell of chocolate — **← Mova's choice** · no support - **2.** The route is passed on by inheritance, not taught — **✓ the right answer** · no support - **3.** It is the same butterfly that came last year — no support - **4.** Its grandmother told it the way before she died — 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/biology/54-migration-the-great-journeys/t6/) ### Test 7 · ★★ · wrong ✗ {#t7} oi why's that goose at the back of the V and not leading? - **1.** It's lost and following anyone — **← Mova's choice** · no support - **2.** Back geese are the babies who are being punished for being slow — no support - **3.** They take turns at the front because it's the hardest place — **✓ the right answer** · no support - **4.** The leader is always the oldest and never changes — 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/biology/54-migration-the-great-journeys/t7/) ### Test 8 · ★★ · wrong ✗ {#t8} Why might it be so hard to watch an eel lay eggs in the middle of the ocean? - **1.** The sea is huge and deep, and eels are hard to follow there — **✓ the right answer** · score 1 - **2.** Eels hide their eggs inside clams and close them up again — score 3 - **3.** It is against the law to look — score 1 - **4.** Eels only lay eggs on land — **← Mova's choice** · score 10 **Why:** It took the question to ask why something happens (its cause). It chose option 4 with score 10, against 3 for the next best. Its support: lesson 54, line 13: «European eels swim thousands of kilometres to the Sargasso Sea to lay eggs, and the babies drift back on ocean currents; nobody has ever seen them lay eggs in…», reached through the cause of the sentence the question matched. What matched: the same action «lay» (+5); the same thing acted on «eggs» (+4); the same doer «european eels» (+1). The right option, 1, scored 1. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/54-migration-the-great-journeys/t8/) ### Test 9 · ★★ · right ✓ {#t9} How could a bird use the Sun as a compass when the Sun moves across the sky? - **1.** It flies only at noon, when the Sun is at the very top of the sky — no support - **2.** It waits for the Sun to stop — no support - **3.** It has an inner clock and knows where the Sun should be at each hour — **← Mova's choice** · **✓ the right answer** · score 7 - **4.** It follows its own shadow — no support **Why:** It took the question to ask what something is like. It chose option 3 with score 7, the only option with support. Its support: lesson 54, line 14: «Migrating birds use the Sun, the stars, landmarks, smells and Earth's magnetism; a bird using the Sun has an inner clock that tells it where the Sun should be…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «sun» (+3); the same circumstance (+3); 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/biology/54-migration-the-great-journeys/t9/) ### Test 10 · ★★ · wrong ✗ {#t10} Why would people build special bridges just for crabs? - **1.** To help the crabs go shopping — **← Mova's choice** · no support - **2.** So tourists can get closer — no support - **3.** Because the crabs bite the tyres of the cars and the buses that pass — no support - **4.** So millions of crabs can reach the sea without being squashed on roads — **✓ 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/biology/54-migration-the-great-journeys/t10/) ### Test 11 · ★★ · wrong ✗ {#t11} What would happen to swallows if winter in Europe still had plenty of flying insects? - **1.** They would turn into a different kind of bird — no support - **2.** Nothing, they leave for fun — no support - **3.** Some might stay instead of making the dangerous journey — **✓ the right answer** · no support - **4.** They would fly even further south than before, all the way to the ice — **← Mova's choice** · score 4 **Why:** It took the question to ask what happens next. It chose option 4 with score 4, the only option with support. Its support: lesson 54, line 6: «Barn swallows from Britain and Europe fly about 10000 km to southern Africa for winter, because there are no flying insects for them in a European winter.», reached through the same lesson line as the sentence the question matched. What matched: the same action «fly» (+2); the same doer «barn swallows» (+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/biology/54-migration-the-great-journeys/t11/) ### Test 12 · ★★ · right ✓ {#t12} What else might make a long journey harder for migrating animals today? - **1.** Dams, roads, buildings and loss of resting places along the way — **← Mova's choice** · **✓ the right answer** · score 16 - **2.** Too many maps — score 4 - **3.** Better weather than before, so they get lazy and forget to set off — no support - **4.** Fewer predators — score 4 **Why:** It took the question to ask what it is done to. It chose option 1 with score 16, against 4 for the next best. Its support: lesson 54, line 18: «Dams on rivers, roads, new buildings and the loss of resting places along the way all make migration harder today.», reached through the same lesson line as the sentence the question matched. What matched: the same action «rest» (+4); the same doer «loss» (+4); the same place «way» (+3); it fills the role the question asks for (+3). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/54-migration-the-great-journeys/t12/) ### Exam question 1 · formal language · right ✓ {#e1} Identify the principal reason for which barn swallows depart Europe in autumn. - **1.** The scarcity of flying insects during the European winter — **← Mova's choice** · **✓ the right answer** · no support - **2.** The necessity of moulting exclusively in Africa, where food is plentiful — no support - **3.** The collapse of their nests in September — no support - **4.** An aversion to the colour of snow — 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/biology/54-migration-the-great-journeys/e1/) ### Exam question 2 · formal language · wrong ✗ {#e2} Which of the following statements most accurately characterises the migration of the arctic tern? - **1.** It is confined to the coasts of Britain — **← Mova's choice** · no support - **2.** It occurs entirely within the tropics — no support - **3.** It is undertaken once in a lifetime, at the age of about thirty years — no support - **4.** It is the longest yearly migration of any animal, from pole to pole — **✓ 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/biology/54-migration-the-great-journeys/e2/) ### Exam question 3 · formal language · wrong ✗ {#e3} Select the response consistent with the established facts concerning the navigation of the salmon to its natal river. - **1.** It is accomplished by observation of the stars beneath the water — **← Mova's choice** · no support - **2.** It is guided by the wakes of passing vessels — no support - **3.** It is a matter of pure chance — no support - **4.** It is accomplished principally by means of the sense of smell — **✓ 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/biology/54-migration-the-great-journeys/e3/) ### Exam question 4 · formal language · wrong ✗ {#e4} It is given that the young cuckoo undertakes its first migration unaccompanied. Ascertain the conclusion that follows. - **1.** The route is taught by the foster parents — **← Mova's choice** · no support - **2.** The young cuckoo does not in fact migrate — no support - **3.** Knowledge of the route must be inborn — **✓ the right answer** · no support - **4.** The route is learned by following swallows — 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/biology/54-migration-the-great-journeys/e4/) - ← previous: [53. How animals defend themselves](https://md.mova.elamur.ai/free/en/school-run/biology/53-how-animals-defend-themselves/) - next →: [55. Sleep and hibernation](https://md.mova.elamur.ai/free/en/school-run/biology/55-sleep-and-hibernation/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/)