Environmental Sustainability

Question 3:The Malayan tiger is an animal facing the threat of extinction in Malaysia. Currently, the number is dwindling to less than 200 throughout the whole country. These animals that can be sold at a high price in the international markets have become the target of illegal hunters.(a) State the physical characteristics of a Malayan … Read more

Question 2:A country is deemed to have food security when individuals, households or all citizens get sufficient, safe and nutritious food to lead a healthy and active life. Photograph 1 shows a situation where children in an area are experiencing food security threats.(a) What is meant by food security?(b) Predict one of the health problems … Read more

Question 1:Figure 1.1 and Figure 1.2 show activities that threaten the ecosystem.(a) State the environmental threats shown in Figure 1.1 and Figure 1.2.(b) Name two pollutants being released from the activity shown in Figure 1.1.(c) Based on Figure 1.1 and Figure 1.2, explain how those activities can cause the world to experience climate change.(d) Discuss … Read more

Question 1:State the meaning of green technology. Answer:Green technology refers to the development and application of products, equipment and systems to preserve the environment and nature and minimising or reducing negative impacts from human activities. Question 2:What are the roles of an individual in order to materialise the National Green Technology Policy? Answer:• Using energy … Read more

Question 1:List the four important components in food security. Answer:Four important components of food security: Food availability, food access, food usage and food stability. Question 2:In your opinion, what are the responsibilities of a food entrepreneur in achieving food security? Answer:Food entrepreneur needs to prepare enough food with good quality and accommodate the needs of … Read more

Question 1:State the meaning of:(a) Ecosystem preservation(b) Ecosystem conservation(c) Ecosystem restoration Answer:(a) Ecosystem preservation is an effort to protect the components of an ecosystem so that it can maintain its natural condition.(b) Ecosystem conservation means the efforts of healing environmental resources such as water, forest, energy, air, minerals and others which are used without causing … Read more

Question 1:State three human activities that have negative impacts on the environment. Answer:Deforestation, open burning, animal farming, mining, agriculture and combustion (Any three activities) Question 2:Explain how an agricultural activity can cause the death of aquatic animals. Answer:The usage of nitrate and phosphate fertilisers causes eutrophication. Algae grow rapidly until they cover up the surface … Read more

Experiment 10.1 – Level of Biochemical Oxygen Demand (BOD) Present in Different Water Samples :Problem statementWhich water sample has the highest BOD level?AimTo compare the level of biochemical oxygen demand (BOD) present in various water samplesHypothesisDrain water has the highest BOD level.VariablesManipulated variable: Water samplesResponding variable: BOD levelConstant variables: Volume of water and volume of … Read more

Question 1:(a) Diagram I shows the effects of farming activities near a pond.Explain how the farming activities cause the death of the aquatic plants and the fishes in the pond.(b) Diagram II shows a new industrial area situated near a residential area.Discuss the good and the bad effects caused by the industrial activities on human … Read more