---
title: Glaciers, ice ages and polar lands — how Mova does on the tests · World
description: Lesson 65 of the world course of Mova's primary school: 11 of 13 tests right, exam 1 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/school-run/world/65-glaciers-ice-ages-polar-lands/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [World](https://md.mova.elamur.ai/free/en/school-run/world/) / 65

# Glaciers, ice ages and polar lands

<!-- .vintro -->
**Tests:** 11 of 13 right · **Exam:** 1 of 4 right · **Kind:** ★★ · **Understood:** 13 of 17 · **Run:** 2026-10-18, commit `f3c23ea72`

<!-- .vabout -->
Lesson 65 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/65-glaciers-ice-ages-polar-lands/).

<!-- .vabout -->
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/65-glaciers-ice-ages-polar-lands/).

<!-- div qa ok -->

### Test 1 · ★★ · right ✓ {#t1}

<!-- .q -->
Walking in Scotland, you find a wide valley with a flat floor and steep sides like the letter U, but no ice. What most likely made it?

- **1.** A glacier during the ice age — **← Mova's choice** · **✓ the right answer** · score 12
- **2.** People digging for coal — no support
- **3.** A small stream over a few years — no support
- **4.** An earthquake that split the land — no support

<!-- .why -->
**Why:** It took the question to ask a circumstance (with what, when, how). It chose option 1 with score 12, the only option with support. Its support: lesson 65, line 8: «Glaciers carve valleys shaped like the letter U; rivers cut valleys shaped like the letter V.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same thing acted on «valleys» (+4); the same circumstance (+4). Against it: a different action (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t1/)

<!-- /div -->

<!-- div qa ok -->

### Test 2 · ★★ · right ✓ {#t2}

<!-- .q -->
A huge boulder of granite sits alone in a field where all the rock below is limestone. How could it have got there?

- **1.** A glacier carried it and dropped it when the ice melted — **← Mova's choice** · **✓ the right answer** · score 5
- **2.** A volcano threw it there last year — score 5
- **3.** It grew there from the limestone — no support
- **4.** A river rolled it uphill — no support

<!-- .why -->
**Why:** It took the question to ask what something is like. 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 65, line 9: «A glacier can carry huge boulders far from where they broke off and drop them when the ice melts.», reached through the same lesson line as the sentence the question matched. What matched: the same action «carry» (+3); the same doer «glacier» (+3). Against it: a different thing acted on (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t2/)

<!-- /div -->

<!-- div qa ok -->

### Test 3 · ★★ · right ✓ {#t3}

<!-- .q -->
All the floating ice in the Arctic Ocean melts one summer. What happens to the sea level?

- **1.** It falls by many metres — no support
- **2.** It hardly changes, because the ice was already floating — **← Mova's choice** · **✓ the right answer** · score 9
- **3.** It rises by many metres — no support
- **4.** The oceans overflow onto every continent — no support

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 2 with score 9, the only option with support. Its support: lesson 65, line 17: «Melting ice on land raises the sea level; melting floating sea ice hardly changes it.», reached through the same lesson line as the sentence the question matched. What matched: the same action «change» (+4); the same doer «floating sea ice» (+4); the same property (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t3/)

<!-- /div -->

<!-- div qa ok -->

### Test 4 · ★★ · right ✓ {#t4}

<!-- .q -->
If the ice sheet of Greenland, which lies on land, melted, what would happen?

- **1.** The sea would turn into fresh water — score 2
- **2.** The sea would rise and flood low coasts — **← Mova's choice** · **✓ the right answer** · score 5
- **3.** Nothing, because the ice already floats — score 5
- **4.** The sea would sink lower — score 5

<!-- .why -->
**Why:** It took the question to ask who or what does it. 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 65, line 5: «Ice sheets hold about two thirds of the Earth's fresh water. When ice on land melts, the sea rises; when floating sea ice melts, the sea hardly changes, just a…», reached through a sentence linked to the one the question matched. What matched: the same action «rise» (+2); it fills the role the question asks for (+2); the same doer «sea» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t4/)

<!-- /div -->

<!-- div qa ok -->

### Test 5 · ★★ · right ✓ {#t5}

<!-- .q -->
During the ice age, people walked from Asia to North America on dry land where there is sea today. How was that possible?

- **1.** The ocean between them had boiled away — no support
- **2.** The continents were joined by a giant bridge of ice built across the open sea — no support
- **3.** The sea was lower because so much water was frozen in ice sheets — **← Mova's choice** · **✓ the right answer** · score 9
- **4.** People could walk on the sea floor under water — no support

<!-- .why -->
**Why:** It took the question to ask what something is like. It chose option 3 with score 9, the only option with support. Its support: lesson 65, line 3: «An ice age is a long cold time when ice sheets spread over much of the land. The last cold period ended about 11,700 years ago; at its peak, ice up to 3 kilome…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same doer «sea» (+3); the same light verb (be, have, do, get, go) (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t5/)

<!-- /div -->

<!-- div qa ok -->

### Test 6 · ★★ · right ✓ {#t6}

<!-- .q -->
A zoo shows a polar bear and a penguin side by side in an "Antarctic" display. What is wrong?

- **1.** Penguins live only in the Arctic, far away from the bears — score 2
- **2.** Polar bears live in the Arctic, not in Antarctica — **← Mova's choice** · **✓ the right answer** · score 5
- **3.** Both animals live only in hot lands near the equator — no support
- **4.** Nothing, both live together on the ice in Antarctica — no support

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 2 with score 5, against 2 for the next best. Its support: lesson 65, line 15: «Polar bears live in the Arctic and penguins live in the south, mostly around Antarctica.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «polar bears» (+2); the same place «arctic» (+2); the same action «live» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t6/)

<!-- /div -->

<!-- div qa no -->

### Test 7 · ★★ · wrong ✗ {#t7}

<!-- .q -->
Snow falls on a high mountain each winter, but every summer all of it melts. Will a glacier form there?

- **1.** Yes, as long as the mountain is high — no support
- **2.** No, because the snow must pile up year after year — **✓ the right answer** · score 7
- **3.** No, because glaciers form only in the sea — **← Mova's choice** · score 8
- **4.** Yes, because snow falls every winter — score 7

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 3 with score 8, against 7 for the next best. Its support: lesson 65, line 1: «A glacier is a huge mass of ice that slowly flows downhill under its own weight. It forms where more snow falls in winter than melts in summer, so year after y…», reached through the same lesson line as the sentence the question matched. What matched: the same action «form» (+4); the same doer «glacier» (+4). The right option, 2, scored 7. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t7/)

<!-- /div -->

<!-- div qa ok -->

### Test 8 · ★★ · right ✓ {#t8}

<!-- .q -->
Why does dark sea water warm up faster than white ice when the Sun shines on both?

- **1.** Dark water takes in more sunlight while white ice reflects it — **← Mova's choice** · **✓ the right answer** · score 3
- **2.** The Sun shines only on water — score 3
- **3.** Water is always closer to the Sun — score 3
- **4.** Ice makes its own cold air — score 2

<!-- .why -->
**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 40, line 9: «Sweat cools the body because evaporating water takes heat away from the skin.», reached through the option's own match among the sentences about the question's things. What matched: the same action «take» (+2); the same doer «evaporating water» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t8/)

<!-- /div -->

<!-- div qa no -->

### Test 9 · ★★ · wrong ✗ {#t9}

<!-- .q -->
A ship's captain sees a small iceberg ahead. Why must he steer far around it?

- **1.** Icebergs pull ships towards them like magnets — no support
- **2.** Most of the iceberg is hidden under the water — **✓ the right answer** · no support
- **3.** Icebergs give off a poisonous gas as they melt — no support
- **4.** Icebergs move much faster than ships can steer away — **← Mova's choice** · score 10

<!-- .why -->
**Why:** It took the question to ask why something happens (its cause). It chose option 4 with score 10, the only option with support. Its support: lesson 40, line 5: «Light travels about a million times faster than sound, so we see lightning almost at once but hear the thunder later; sound takes about 3 seconds to go one kil…», reached through the cause of the sentence the question matched. What matched: the same action «travel» (+5); the same property (+3); a different doer (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/world/65-glaciers-ice-ages-polar-lands/t9/)

<!-- /div -->

<!-- div qa ok -->

### Test 10 · ★★ · right ✓ {#t10}

<!-- .q -->
why are there no penguins up by the north pole, polar bears'd eat em?

- **1.** The north is too warm for penguins to live there — no support
- **2.** Polar bears ate all the penguins in the north long ago — no support
- **3.** Penguins live in the south, mostly around Antarctica — **← Mova's choice** · **✓ the right answer** · score 4
- **4.** Penguins live at the North Pole but hide in winter — score 3

<!-- .why -->
**Why:** It took the question to ask why something happens (its cause). It chose option 3 with score 4, against 3 for the next best. Its support: lesson 65, line 15: «Polar bears live in the Arctic and penguins live in the south, mostly around Antarctica.», reached through the option's own match among the sentences about the question's things. What matched: the same action «live» (+2); the same doer «penguins» (+1); the same place «south» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t10/)

<!-- /div -->

<!-- div qa ok -->

### Test 11 · ★★ · right ✓ {#t11}

<!-- .q -->
how come norway's got those deep long sea valleys, the fjord things

- **1.** Glaciers carved deep U-shaped valleys that the sea later flooded — **← Mova's choice** · **✓ the right answer** · no support
- **2.** Earthquakes split the coast into long deep cracks — no support
- **3.** Rivers cut deep V-shaped valleys right down to the sea — no support
- **4.** Waves wore away the soft rock over many years — 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/65-glaciers-ice-ages-polar-lands/t11/)

<!-- /div -->

<!-- div qa ok -->

### Test 12 · ★★ · right ✓ {#t12}

<!-- .q -->
Leo says if the arctic sea ice melts the sea'll rise loads. right?

- **1.** No, melting floating sea ice hardly changes the sea level — **← Mova's choice** · **✓ the right answer** · score 11
- **2.** Yes, but only the ice near the North Pole — no support
- **3.** Yes, any melting ice at all raises the level of the sea by a lot — score 10
- **4.** No, melting sea ice makes the sea level fall — no support

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 1 with score 11, against 10 for the next best. Its support: lesson 65, line 17: «Melting ice on land raises the sea level; melting floating sea ice hardly changes it.», reached through the same lesson line as the sentence the question matched. What matched: the same action «change» (+4); the same doer «floating sea ice» (+4); the same thing acted on «level» (+2); the same property (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/t12/)

<!-- /div -->

<!-- div qa ok -->

### Test 13 · ★★ · right ✓ {#t13}

<!-- .q -->
a video said Antarctica is just a big frozen ocean like the Arctic. true?

- **1.** No, Antarctica is land covered by a thick ice sheet — **← Mova's choice** · **✓ the right answer** · no support
- **2.** Yes, both poles are frozen oceans with no land — no support
- **3.** Yes, but the Antarctic ice is thicker than the Arctic — no support
- **4.** No, Antarctica is land with almost no ice on it — 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/65-glaciers-ice-ages-polar-lands/t13/)

<!-- /div -->

<!-- div qa no -->

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

<!-- .q -->
Which of the following statements most accurately characterises a glacier?

- **1.** A floating sheet of frozen sea water — **← Mova's choice** · no support
- **2.** A large mass of ice moving slowly downhill — **✓ the right answer** · no support
- **3.** A deep valley flooded by the sea — no support
- **4.** A lake which freezes each winter — 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/65-glaciers-ice-ages-polar-lands/e1/)

<!-- /div -->

<!-- div qa no -->

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

<!-- .q -->
Identify the characteristic form of a valley carved by a glacier.

- **1.** A valley shaped like the letter W — **← Mova's choice** · score 8
- **2.** A valley shaped like the letter V — score 8
- **3.** A valley shaped like the letter U — **✓ the right answer** · score 8
- **4.** A valley of perfectly circular form — no support

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 1 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 65, line 2: «A glacier is a giant bulldozer and file: rocks frozen into its bottom scrape the land, so it carves deep valleys shaped like the letter U, digs hollows that la…», reached through the remembered sentence the question matched. What matched: the same circumstance (+4); the same action «shape» (+3); the same thing acted on «deep valleys» (+1). The right option, 3, scored 8. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/e2/)

<!-- /div -->

<!-- div qa no -->

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

<!-- .q -->
It is given that ice upon land melts, and that floating sea ice likewise melts. Determine which of the two shall raise the level of the sea.

- **1.** Neither shall raise it in any degree — **← Mova's choice** · score 4
- **2.** The melting of ice upon land — **✓ the right answer** · score 3
- **3.** Both shall raise it equally — score 2
- **4.** The melting of floating sea ice — no support

<!-- .why -->
**Why:** It took the question to ask which statement is true. It chose option 1 with score 4, against 3 for the next best. Its support: lesson 65, line 17: «Melting ice on land raises the sea level; melting floating sea ice hardly changes it.», reached through the remembered sentence the question matched. What matched: the same action «raise» (+3); the same thing acted on «sea level» (+1). The right option, 2, scored 3. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/world/65-glaciers-ice-ages-polar-lands/e3/)

<!-- /div -->

<!-- div qa ok -->

### Exam question 4 · formal language · right ✓ {#e4}

<!-- .q -->
Select the response that is consistent with the established facts concerning the polar regions.

- **1.** Antarctica is a continent of land beneath ice, whereas the Arctic is chiefly frozen ocean — **← Mova's choice** · **✓ the right answer** · no support
- **2.** Both are continents of land beneath ice — no support
- **3.** Both are oceans covered with floating ice — no support
- **4.** The Arctic is a continent of land beneath ice, whereas Antarctica is chiefly frozen ocean — 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/65-glaciers-ice-ages-polar-lands/e4/)

<!-- /div -->

<!-- pn -->
- ← previous: [64. Rivers, lakes and the sea up close](https://md.mova.elamur.ai/free/en/school-run/world/64-rivers-lakes-and-the-sea/)
- next →: [66. Deserts, rainforests and grasslands](https://md.mova.elamur.ai/free/en/school-run/world/66-deserts-rainforests-grasslands/)
- ↑ back to [World](https://md.mova.elamur.ai/free/en/school-run/world/)