Free CXC Integrated Science Paper 2 May/June 2022 past paper from 2022. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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CSEC Integrated Science Paper 2 May/June 2022 - Free CXC Past Paper with Answers
Free CXC Integrated Science Paper 2 May/June 2022 past paper from 2022. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Every question from this paper as text. See the answers and worked solutions. Questions are the property of the Caribbean Examinations Council; Caribbean AI is not affiliated with CXC.
List THREE methods that can be used to purify water for drinking.
[3 marks]
Describe ANY ONE of the three methods listed in (a) (i).
[2 marks]
Explain ONE way in which plastics may negatively impact aquatic life.
[3 marks]
Suggest THREE measures that countries could utilize to ensure that they do not contribute to the formation of garbage islands.
[3 marks]
The Government of Country Y developed a mega farm close to the mouth of a river. Explain how establishing the farm near the river may negatively impact aquatic life.
[3 marks]
Company X accidentally released effluents into a nearby river. A quality monitoring exercise was carried out by the company to determine the impact of the effluents released on the amount of dissolved oxygen in the river. The monitoring exercise showed that the oxygen level present before the river was polluted was 6.5 ppm. Table 1 shows the results of the monitoring exercise.
| Distance Away From the Source of Pollution (M) | Dissolved Oxygen (ppm) |
|---|---|
| 10 | 1 |
| 20 | 2 |
| 30 | 3 |
| 40 | 4 |
| 50 | 5 |
| 60 | 6 |
[25 marks]
On the axis provided on page 7, plot a graph of distance away from the source of pollution (m) against dissolved oxygen to represent the data in Table 1. Draw a line of best fit through the points.
[6 marks]
Label the axes on the graph.
[2 marks]
Using the graph on page 7, determine the distance at which the river returned to the oxygen level that was present before it was polluted (6.5 ppm).
[1 mark]
Describe the trend in the amount of dissolved oxygen in the water as the distance away from the source of pollution increases.
[1 mark]
State ONE conclusion that can be made about the impact of the effluents released on the amount of dissolved oxygen in the river.
[1 mark]
The electricity company is about to install overhead power lines in your area.
[15 marks]
The electricity company is about to install overhead power lines in your area. Using the formula , calculate the power in the lines when the voltage is 6400 V and the current flow/flow of current is 800 A. Show your working.
[2 marks]
Using the formula energy consumption = power time, calculate the amount of energy consumed in the lines as they supply power to 100 houses for 16 hours.
[1 mark]
Use the power calculated in (a) (i) to determine the energy produced, in kWh, after four hours. Show your working.
[2 marks]
Mrs Eckles believes that the fuse in her toaster tends to stop working often and she wants to try to fix it before purchasing a new one.
Mrs Eckles believes that the fuse in her toaster tends to stop working often and she wants to try to fix it before purchasing a new one. Define the term 'fuse'.
[1 mark]
Explain how a fuse protects an appliance such as a toaster.
[3 marks]
Complete Table 2 by providing labels to identify the colour codes for EACH of the wires used in wiring a house.
[3 marks]
Complete Table 2 by providing labels to identify the colour codes for EACH of the wires used in wiring a house.
TABLE 2: COLOUR CODES FOR WIRES USED IN WIRING A HOUSE
| Type of Wire | Colour Code |
|---|---|
| Live wire (L) | |
| Neutral wire (N) | |
| Earth wire (E) |
[3 marks]
List THREE first-aid strategies that could be employed to help a victim who received an electric shock.
[3 marks]
Define the term 'energy' and state the unit in which it is measured.
[2 marks]
Complete the flow chart in Figure 1 below by describing the energy changes that take place in the internal combustion engine of a car.
[3 marks]
The law of conservation of energy states that energy cannot be made or destroyed. Explain what happens to energy when it is used.
[3 marks]
Pollution from the use of fossil fuels is known to cause environmental damage.
[4 marks]
Explain ONE negative impact of the use of fossil fuels on the environment.
[3 marks]
Recommend TWO ways in which individuals could reduce the negative impacts of the usage of fossil fuels. Give ONE reason for EACH recommendation.
[4 marks]
Complete Figure 2 by identifying EACH of the layers of a soil profile labelled A, B, C, D and E.
Figure 2. Diagram of a soil profile
[5 marks]
The pH of Layer C is 5.5. Based on the pH value, classify Layer C as either acidic, basic or neutral.
[1 mark]
Mr Thomas has started a kitchen garden in his backyard. However, the plants are not growing as well as expected.
Explain how the pH of the soil could be impacting soil fertility.
[3 marks]
Explain the importance of EACH of the following components of soil.
[6 marks]
Humus
[3 marks]
Air
[3 marks]
Define the term 'biodegradable'.
[1 mark]
Shipping vessels usually dock at ports with a number of waste items on board. Classify EACH of the following waste items found on a ship as either biodegradable or non-biodegradable.
[4 marks]
Expired food
[1 mark]
Plastic food containers
[1 mark]
Glass beverage bottles
[1 mark]
Styrofoam cups
[1 mark]
Explain why proper waste management is important.
[3 marks]
Small rodent droppings were noticed around a vessel that docked at a port. Recommend TWO sanitary measures that may be used to eliminate the rodents. Give ONE reason for EACH sanitary measure recommended.
[4 marks]
Explain how biogas production could assist with waste management on the vessels.
[3 marks]
Describe the following methods of fishing that are used in the Caribbean.
[4 marks]
Harpoon
[2 marks]
Trapping (use of fishing pots)
[2 marks]
List THREE methods of fishing, other than harpoon fishing and trapping (use of fishing pots), that are practised in the Caribbean.
[3 marks]
Some fishermen would like to use metal fishing pots. However, they are concerned about rusting.
Discuss how the environment in which the fishermen work could contribute to the rusting of the fishing pots.
[4 marks]
Discuss ONE method that could be used to prevent rusting of the fishing pots.
[4 marks]