Question 14
Question 14 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
2. Thermal physics
2.1.1. States of matter

Know the distinguishing properties of solids, liquids and gases

3. Waves
3.4. Sound

Know that, in general, sound travels faster in solids than in liquids and faster in liquids than in gases

2. Thermal physics
2.3.2. Convection

Explain convection in liquids and gases in terms of density changes and describe experiments to illustrate convection