B7.3 Humans impacts and biodiversity

What is biodiversity?

• the variety of all the different species of organisms on earth, or within an ecosystem

• 
  all organisms in a food web depend upon each other

• 
  all the food chains for a habitat combined

• biotic and abiotic factors combined

What term describes the graph of World human population increase?

• 
  Normal distribution

• 
  Exponential

• 
  Linear

• Explosive

Which of these is not a reason for an increase in human population?

• 
  Better health care

• 
  Intensive farming

• 
  Antibiotic-resistant bacteria

• Better sanitation

What is the major cause of acid rain?

• Sulfur dioxide and nitrogen oxides

• Ozone

• Carbon dioxide

• Deforestation

What is eutrophication caused by?

• 
  The greenhouse effect

• 
  Excess fertilisers running off agricultural land into waterways

• 
  Smog

• Burning fossil fuels

What process occurs very slowly in peat bogs?

• Respiration

• 
  Photosynthesis

• Decomposition

• Combustion

What are peat bogs an important store of?

• Carbon

• Nitrogen

• Water

• Algae

Which of these is not a consequence of global warming?

• More tropical diseases

• Lowering of sea levels

• Extinctions

• Changes in weather patterns

What is conservation?

• Cutting down of trees

• Rapid growth of algae as a result of fertilisers

• The preservation of ecosystems

• Making jam

Which of these is NOT a way of increasing biodiversity?

• Deforestation to create more space for agriculture

• Breeding and reintroduction programmes

• Planting hedgerows around farmers' fields

• Recycling resources instead of sending waste to landfill