CIE iGCSE Co-Ordinated Science P2.3.1 Conduction Exam Style Questions Paper 2
Question
Water in a metal pan is heated on a gas burner.
What are the main methods by which heat is transferred through the metal pan to the water and throughout the water?
(A) conduction through the metal pan and convection in the water
(B) convection through the metal pan and conduction in the water
(C) convection through the metal pan and radiation in the water
(D) radiation through the metal pan and conduction in the water
▶️Answer/Explanation
Ans: A
Question
Which statement explains why metals are better thermal conductors than non-metals?
(A) Atoms in metals are fixed in a lattice by bonds.
(B) Atoms in metals vibrate about fixed positions.
(C) Metals contain free electrons.
(D) Metals contain free protons.
▶️Answer/Explanation
Ans : C
Question
Solid metals transfer thermal energy by conduction. Which conduction process occurs only in metals?
- Atoms move freely through the solid and carry energy.
- Atoms vibrate about fixed positions and pass energy to neighbouring atoms.
- Electrons move freely through the solid and carry energy.
- Electrons vibrate about fixed positions and pass energy to neighbouring electrons.
▶️Answer/Explanation
Answer: C
Explanation: In metals, thermal energy is primarily conducted by the movement of free electrons, which can move freely through the lattice structure of the metal.
Question
The diagram shows an object made partly of wood and partly of iron. Thermal energy is supplied
in the position shown. Point P is marked at the bottom of the object
How does most thermal energy reach point P?
A by conduction through the iron
B by conduction through the wood
C by convection through the iron
D by convection through the wood
▶️Answer/Explanation
Ans :A