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Environmental Change and Pollution — Free MYP2 Sciences Practice Questions
1QuestionAir Water and Soil PollutionConcept Practice
2 marks~3 minCriterion A
The diagram shows a river with three pollution sources labelled X, Y, and Z.
- Label X: a factory pipe releasing waste into the river
- Label Y: smoke from a car exhaust
- Label Z: a pile of garbage on the riverbank
- Label X: a factory pipe releasing waste into the river
- Label Y: smoke from a car exhaust
- Label Z: a pile of garbage on the riverbank
a
Identify the type of pollution (water, air, or soil) represented by each label X, Y, and Z. [1]
b
Explain why Label Z represents a different type of pollution from Label X. [1]
Solutions
2QuestionGlobal Warming and Climate ChangeAssessment Practice
3 marks~5 minCriterion C
The graph below shows atmospheric CO₂ concentration (in parts per million, ppm) and global average temperature (in °C) from 1900 to 2020.
a
Identify the trend shown by both variables between 1900 and 2020. [1]
b
Explain how increasing CO₂ concentration causes global temperatures to rise. [1]
c
A student says: "Temperature rises caused the CO₂ increase, not the other way around." Using the greenhouse effect, explain why scientists disagree with this claim. [1]
Solutions
3QuestionNatural vs Human-Induced Environmental ChangeAssessment Practice
6 marks~9 minCriterion B
A student measured the mass of leaf litter (dead leaves) decomposing (breaking down) over 8 weeks in two settings.
Measurements taken at weeks: 0, 2, 4, 6, 8.
| Compost bin (human-managed) — mass (g) | 100 | 85 | 72 | 61 | 52 |
|---|---|---|---|---|---|
| Forest floor (natural) — mass (g) | 100 | 92 | 85 | 79 | 74 |
Measurements taken at weeks: 0, 2, 4, 6, 8.
a
Identify the pattern of mass loss in each setting. [2]
b
Estimate the mass of leaf litter in each setting at week 10. Show your working. [2]
c
Compare the rate of decomposition in the two settings and give one scientific reason for the difference. [2]
Solutions
4QuestionAir Water and Soil PollutionAssessment Practice
7 marks~11 minCriterion D
A factory near a river releases wastewater containing oil and heavy metals (toxic substances that harm living things). Its filter removes 90% of the oil but only 30% of the heavy metals before the water enters the river.
a
Identify two harmful effects that would occur in the river without any filtering. [2]
b
Explain why the remaining heavy metals in the river water are still a serious problem, even after filtering. [3]
c
Compare the environmental and economic impacts of allowing the factory to continue operating with this filter. [2]
Solutions
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