---
title: Materials and their properties — the lesson's questions with trees and pragmatics · World
description: The 17 test and exam questions of lesson 18 «Materials and their properties» of the world course of Mova's primary school, each with its options, Mova's choice and the right answer, every sentence with its dependency tree and pragmatics.
---

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# Materials and their properties

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The 17 questions of lesson 18 «Materials and their properties» of the world course of Mova's primary school with their options, 90 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/world/18-materials-and-properties/).

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- [t1](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t1/) — A cook leaves a metal spoon and a plastic spoon in a pot of hot stew. Which handle gets hot? — wrong ✗ · ★★
- [t2](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t2/) — Why do birds fluff out their feathers on a frosty day? — wrong ✗ · ★★
- [t3](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t3/) — A ball of plasticine sinks, but the same plasticine pressed into a boat shape floats. Why? — right ✓ · ★★
- [t4](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t4/) — Which is true about salt dissolved in water? — right ✓ · ★★
- [t5](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t5/) — Why are picnic cool boxes made with a thick layer of foam? — wrong ✗ · ★★
- [t6](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t6/) — How can you get salt back from salty water? — right ✓ · ★★
- [t7](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t7/) — A builder puts a thick fluffy layer of insulation in a roof. What is it for? — wrong ✗ · ★★
- [t8](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t8/) — An apple floats but a raw potato of the same size usually sinks. Why? — right ✓ · ★★
- [t9](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t9/) — Which will dissolve in a glass of warm water? — right ✓ · ★★
- [t10](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t10/) — why's the metal spoon in my tea so hot but not the wooden one — right ✓ · ★★
- [t11](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t11/) — will sugar dissolve quicker in hot tea or cold — right ✓ · ★★
- [t12](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t12/) — Leo says a coat keeps u warm cos it makes heat. true? — wrong ✗ · ★★
- [t13](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/t13/) — Tom reckons heavy things always sink. right? — wrong ✗ · ★★
- [e1](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/e1/) — Identify, from among the following, the material that conducts heat most effectively. — wrong ✗ · exam
- [e2](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/e2/) — Which of the following statements most accurately characterises the function of a warm coat? — wrong ✗ · exam
- [e3](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/e3/) — Identify the determining condition by which an object floats upon water. — right ✓ · exam
- [e4](https://md.mova.elamur.ai/free/en/corpora/questions/world/18-materials-and-properties/e4/) — It is given that 10 grams of sugar is dissolved in 100 grams of water. Ascertain the mass of the resulting solution. — right ✓ · exam

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