CIE iGCSE Co-Ordinated Science P2.1.1 States of matter Exam Style Questions Paper 1
▶️ Answer/Explanation
When a gas changes into a liquid, it is losing energy and its particles are moving closer together.
This change of state is called condensation.
✅ Answer: (B)
This change of state is called condensation.
✅ Answer: (B)
▶️ Answer/Explanation
The particle diagram shows a change from a more randomly arranged, freely-moving state to a tightly packed, regularly-ordered state.
This ordered, closely-packed arrangement with particles only vibrating in fixed positions is characteristic of a solid.
A liquid changing into this solid arrangement is the process of solidification (freezing).
✅ Answer: (D)
This ordered, closely-packed arrangement with particles only vibrating in fixed positions is characteristic of a solid.
A liquid changing into this solid arrangement is the process of solidification (freezing).
✅ Answer: (D)
Question
A copper disc has a hole at its center that is slightly too small to fit over a copper cylinder.
How can the disc be fitted over the cylinder?
(A) Cool the disc and then fit it over the cylinder.
(B) Cool the disc, heat the cylinder and then fit the disc over the cylinder.
(C) Heat the cylinder and then fit it through the hole in the disc.
(D) Heat the disc and then fit it over the cylinder.
▶️Answer/Explanation
Ans: D
Question
Which labelled arrow on the diagram represents condensation?
A) liquid to gas
B) gas to liquid
C) solid to liquid
D) liquid to solid
▶️Answer/Explanation
Answer: B) gas to liquid
Explanation: Condensation is the process by which a gas changes into a liquid, represented by the arrow from gas to liquid.