Physics 5054/41 — October/November 2018
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation · Observations and Measurements · Planning Experiments and Investigations
A teacher demonstrates convection in a liquid. She uses a glass tube, as shown in Fig. 1.1.
The tube is filled with water and left to stand for ten minutes. A purple crystal is then placed in the mouth of the tube. This crystal dissolves and makes the water around it turn purple. The tube is then gently heated, as shown in Fig. 1.1.
Suggest why the water is left to stand for ten minutes before placing the crystal in the tube.
When the water is heated, it is heated gently.
Suggest why.
On Fig. 1.1, draw an arrow to show the direction in which the purple colour moves through the water.
State one safety precaution the teacher should take in this demonstration.
The rest of this paper
3 more questions- Q2Use of Techniques, Apparatus and Materials · Experimental Contexts · Analysis, Conclusions and Evaluation · Observations and Measurements11M
- Q3Use of Techniques, Apparatus and Materials · Experimental Contexts · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation7M
- Q4Use of Techniques, Apparatus and Materials · Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation8M