Physics Paper 1 Marking Scheme
KCSE CLUSTER TESTS 25
Physics Paper 1
SECTION A (25 Marks)
2 marks
The match stick placed on the metal block gets extinguished earlier
The metal block conducts the heat away from the burning point extinguishing the match stick
2 marks
To magnify the mercury thread so that the mercury level is clearly seen.
1 marks
3 marks
3 marks
Steam transfers more heat energy to the body than boiling water
1 marks
1 marks
1 marks
2 marks
Increases surface tension
Molecules decrease in kinetic energy hence less mobile.
2 marks
3 marks
The earthen jug has pores which allow water to diffuse / seep out and evaporate causing a cooling effect/ latent heat of evaporation causes cooling.
1 marks
Air flowing above the capillary tube has a high velocity resulting in low pressure region atmospheric pressure push the water upward in the capillary tube
2 marks
The sum of the vertically upward forces is equal to the sum of the vertically downward forces.
1 marks
SECTION B (55 Marks)
12 marks
12 marks
12 marks
10 marks
10 marks