Biology F5 KSSM Chapter 10

Which of human activities can threaten the ecosystem?

• Research & Development

• Industrialisation & Deforestation

• Conservation

• Proper management of development

What is the phenomenon based on the diagram above?

• Thinning of ozone layer

• Greenhouse effect

• Air pollution

• Eutrophication

Which of the following causes eutrophication

• Pesticide

• Herbicide

• Fertiliser

• Carbon dioxide

Which of the following substance causes eutrophication which is a condition that encourages algae to grow rapidly?

• Radioactive waste

• Phosphate

• Sediment

• Lead

What is the effect of global warming as a result of deforestation?

• Rising sea levels

• Soil erosion

• Air pollution

• Thinning of ozone layer

High BOD indicates__________

• water is polluted

• water is clean

Which two are likely to result from global warming?

• increase in surface temperatures

• reduction in greenhouse gases

• rise in ocean levels

• decrease in air pollution

Which BEST explains why is there an increase in CO2 ?

• Rapid boost in the by burning of fossil fuels

• increase education about climate change

• Population growth leads to exhaling more CO2

• CO2 is released by the oceans as they warm

Eutrophication can happen in a river or lake

• TRUE

• FALSE

Sunlight can reach the bottom during algae bloom

• TRUE

• FALSE