Food chains and food webs

Tests: 5 of 13 right · Exam: 1 of 4 right · Kind: ★ · Understood: 6 of 17 · Run: 2026-10-18, commit f3c23ea72

Lesson 26 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 ✗

In a pond, algae → tadpoles → small fish → heron. Which is the producer?

1. The small fish — ← Mova's choice · no support
2. The algae — ✓ the right answer · no support
3. The heron — no support
4. The tadpoles — 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 ✓

Why would a forest floor be covered with mountains of dead leaves if there were no decomposers?

1. Nothing would break the leaves down — ← Mova's choice · ✓ the right answer · no support
2. Animals would eat all the leaves — no support
3. Leaves would turn back into trees — no support
4. Trees would stop dropping leaves — 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 3 · ★ · wrong ✗

A bear eats berries, fish and honey. What kind of eater is it?

1. A producer — ← Mova's choice · no support
2. A carnivore — no support
3. An omnivore — ✓ the right answer · no support
4. A herbivore — 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 4 · ★ · wrong ✗

Which chain is drawn correctly?

1. Bird → caterpillar → leaf — ← Mova's choice · no support
2. Caterpillar → leaf → bird — no support
3. Leaf → caterpillar → bird — ✓ the right answer · no support
4. Leaf → bird → caterpillar — 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

Test 5 · ★ · wrong ✗

An owl eats mice. What are the mice to the owl?

1. Its predator — score 7
2. Its prey — ✓ the right answer · score 7
3. Its producer — ← Mova's choice · score 8
4. Its decomposer — no support

Why: It took the question to ask what it is done to. It chose option 3 with score 8, against 7 for the next best. Its support: lesson 26, line 10: «Herbivores eat plants, carnivores eat animals, and omnivores eat both.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same thing acted on «plants» (+4). Against it: a different doer (counts against) (-2). The right option, 2, scored 7. · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · right ✓

Why can no food chain start with a cat?

1. A cat is too big to be eaten — no support
2. A cat lives in houses — no support
3. A cat only eats plants — no support
4. A cat cannot make its own food — ← Mova's choice · ✓ the right answer · score 0

Why: It took the question to ask why something happens (its cause). It chose option 4 with score 0, the only option with support. Its support: lesson 26, line 2: «Every food chain starts with a producer, a plant or alga that makes its own food from sunlight; the animals that eat are consumers.», reached through the same lesson line as the sentence the question matched. What matched: the same action «make» (+2); the same thing acted on «own food» (+2). Against it: a different doer (counts against) (-1); one says «not», the other does not (counts against) (-3). · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

Which is true about mushrooms?

1. They make food from sunlight like plants — ← Mova's choice · no support
2. They feed on dead material and break it down — ✓ the right answer · no support
3. They are the producers of the forest — no support
4. They hunt insects as predators — 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

Test 8 · ★ · right ✓

A lion eats a zebra that ate grass. Where did the lion's energy first come from?

1. The Sun — ← Mova's choice · ✓ the right answer · score 9
2. The lion's own body — score 9
3. The zebra's muscles — score 9
4. The water hole — score 9

Why: It took the question to ask where. It chose option 1 with score 9, tied with another option at 9 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 26, line 16: «The energy in almost every food chain comes first from the Sun.», reached through the remembered sentence the question matched. What matched: the same action «come» (+6); the same doer «energy» (+3). · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · wrong ✗

Hawks eat both snakes and mice, and snakes also eat mice. What does this make?

1. A life cycle — ← Mova's choice · no support
2. A food web — ✓ the right answer · no support
3. A single food chain — no support
4. A habitat — 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 10 · ★ · right ✓

wot does every food chain start with

1. A green plant or another producer — ← Mova's choice · ✓ the right answer · no support
2. A plant-eating animal, like a rabbit — no support
3. A decomposer, like a mushroom or worm — no support
4. A big hungry predator, like a wolf — 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 11 · ★ · right ✓

what's a decomposer then

1. A living thing that breaks down dead plants and animals — ← Mova's choice · ✓ the right answer · score 4
2. A plant that makes its own food — no support
3. An animal that eats only plants — no support
4. An animal that hunts down and eats other animals for its food — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 4, the only option with support. Its support: lesson 26, line 4: «Decomposers, such as fungi, bacteria and worms, break down dead plants and animals and return their minerals to the soil for new plants.», reached through the remembered sentence the question matched. What matched: the same action «break down» (+4); the same thing acted on «dead plants» (+2). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 12 · ★ · wrong ✗

Tom says in a food chain the arrow points to what gets eaten. true?

1. No, the arrows have no direction — ← Mova's choice · no support
2. No, it points from the eaten to the eater — ✓ the right answer · no support
3. Yes, it shows who runs away — no support
4. Yes, it points at the food — 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 13 · ★ · wrong ✗

Mia reckons the energy in food chains comes from the soil. right?

1. Yes, plants get their energy from soil — score 4
2. No, it comes first from the animals at the top — ← Mova's choice · score 8
3. Yes, decomposers make all the energy — no support
4. No, almost all of it comes first from the Sun — ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 2 with score 8, against 4 for the next best. Its support: lesson 26, line 16: «The energy in almost every food chain comes first from the Sun.», reached through the remembered sentence the question matched. What matched: the same action «come» (+4); the same doer «energy» (+2); the same property (+2). The right option, 4, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Which of the following statements most accurately characterises a producer within a food chain?

1. A living thing that consumes only animals — score 4
2. A living thing that consumes plants and animals alike, as a bear or a human does — ← Mova's choice · score 5
3. A living thing that decomposes dead matter — score 4
4. A living thing that manufactures its own food by the energy of sunlight — ✓ the right answer · score 4

Why: It took the question to ask who or what does it. It chose option 2 with score 5, against 4 for the next best. Its support: lesson 26, line 5: «In nature most animals eat more than one thing and are eaten by more than one thing, so the chains join into a food web, like a net.», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+3); the same doer «one thing» (+2). The right option, 4, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Identify the direction indicated by the arrows of a food chain.

1. From the predator to its prey — ← Mova's choice · no support
2. From the largest animal to the smallest — no support
3. From the decomposer to the producer — no support
4. From the thing eaten to the thing that eats it — ✓ 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

Exam question 3 · formal language · right ✓

Identify, from among the following, a decomposer.

1. A fungus — ← Mova's choice · ✓ the right answer · no support
2. A fox — no support
3. A grass — no support
4. A rabbit — 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 · wrong ✗

Identify the original source of the energy in almost every food chain.

1. The decomposers — ← Mova's choice · no support
2. Water — no support
3. The soil — no support
4. The Sun — ✓ the right answer · 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/26-food-chains-and-webs/