Carlingford High School
2008
YEAR 12
2 UNIT SENIOR SCIENCE
HALF YEARLY EXAM
Time Allowed: 2 hours
Instructions: * Attempt all questions * Answer all questions in the spaces provided on this paper.
SECTION I: Multiple Choice Questions (Q1-15) (15 marks)
SECTION II: Extended Response Questions (Q16-29) (65 marks)
Name: __________________________ Class: _____________
SECTION I: 15 Multiple Choice Questions (15 marks)
Place a cross in the appropriate space below.
| A | B | C | D | 1 | | | | | 2 | | | | | 3 | | | | | 4 | | | | | 5 | | | | | 6 | | | | | 7 | | | | | 8 | | | | | 9 | | | | | 10 | | | | | 11 | | | | | 12 | | | | | 13 | | | | | 14 | | | | | 15 | | | | |
TOTAL = /15
PART A: MULTIPLE CHOICE QUESTIONS (15 marks)
Use the Multiple Choice Answer Sheet provided to record your answers for this section.
1. Foam is an example of which type of colloid?
A. Liquid in liquid B. Solid in liquid C. Solid in gas D. Gas in liquid
2. What is a solution?
E. A uniform mixture that contains dissolved substances. F. A mixture containing particles that settle out, or form layers, quickly. G. A mixture containing particles that remain suspended, for long periods of time. H. A mixture of oil-in-water or water-in-oil.
3. The diagram below shows Substance X being mixed with substance Y.
The following tests were then carried out on this mixture:
From these results it is most likely that the mixture of X and Y is a:
A. Colloid B. Solution C. Solvent D. Suspension
4. The diagram shows two identical test tubes. One contains some mercury and the other contains a similar volume of water.
What conclusions can be reached by observing the shape of