Cambridge IELTS 4 · Listening · Test 4 · Part 3
Science Experiments — IELTS Listening Answers
All 10 answers for Science Experiments, Cambridge IELTS 4 Listening Test 4 Part 3, with the transcript evidence and an explanation for each.
← All Cambridge 4 Listening Test 4 answers
Science Experiments answer key at a glance
Questions 21–30. Tap an answer to see the evidence.
What this part tests
This part is tested with Table Completion (Q21–26). Each section below gives the strategy for that question type, the answers, and the sentence that proves them.
Questions 21–26: Table Completion
Strategy: Work row by row. The row label tells you where to look; the column heading tells you what kind of word you need.
Options for Questions 21–26
- Atoo messy
- Btoo boring
- Ctoo difficult
- Dtoo much equipment
- Etoo long
- Ftoo easy
- Gtoo noisy
- Htoo dangerous
“Mind you, you only need twenty balloons and a table - you don't need any special engines or anything like that”
The experiment needs only 'twenty balloons and a table', with no special engines or equipment.
“Er, and, basically, because not all paperclips are the same lengths, they should come up with some strange answers. It's supposed to demonstrate the importance of having fixed units of measurement”
Because paperclips differ in length, the experiment demonstrates the need for 'fixed units of measurement'.
“MIKE: OK, now for number three you need rock salt or copper sulphate.SUE: Oh, I'm not sure about that!MIKE: Well, just put down the rock salt then, um, apart from that you only need a jar of water”
Mike offers 'rock salt or copper sulphate', then says 'just put down the rock salt', so salt is enough.
“Um, and basically you dissolve lots of salt into the water and watch the crystals form, so it basically teaches the kids about growing crystals”
You 'dissolve lots of salt into the water and watch the crystals form', so crystals is the result taught.
“then you thread a piece of string through the middle”
A 'piece of string' is threaded through the middle, the only material the experiment needs.
“It teaches them about how white light or ordinary light is made up”
It teaches 'how white light or ordinary light is made up', so ordinary white light fits.
Learn the question types in this part
Frequently asked questions
Where does the Science Experiments listening section come from?
It is Part 3 of Cambridge IELTS 4 Listening Test 4, and it covers Questions 21–30.
What question types appear in Science Experiments?
The part is tested with Table Completion. Each type is explained on this page, alongside the answers.
Are these reading answers reliable?
Every answer is paired with the sentence that proves it, so you can check each one against the passage yourself. Use the page after a timed attempt, not instead of one.
Cambridge IELTS is published by Cambridge University Press & Assessment. Band9Prep is not affiliated with Cambridge. This page is an independent study aid: it gives the answer key, the passage evidence and an explanation so you can review an attempt you have already made.