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IB DP Biology Questions

4.5 Climate Change

Question 1

Which of the following is a significant cause of climate change?

A. Decreased greenhouse gas emissions

B. Land use change

C. Reduced carbon dioxide levels

D. Lowered methane concentrations

Question 2

Why are carbon dioxide and water vapour considered major greenhouse gases?

A. They are less abundant in the atmosphere

B. They have low heat-trapping properties

C. They are significant contributors to the greenhouse effect

D. They cool the Earth's surface

Question 3

How does methane compare to carbon dioxide in terms of its impact on climate change?

A. Methane has a lower global warming potential

B. Methane has a higher global warming potential

C. Methane does not contribute to global warming

D. Methane reduces the greenhouse effect

Question 4

What is the primary role of the greenhouse effect in regulating temperature?

A. It decreases the Earth's surface temperature

B. It traps heat in the atmosphere, warming the Earth's surface

C. It reduces greenhouse gas concentrations

D. It enhances heat escape into space

Question 5

Which human activity is a major contributor to increased carbon dioxide levels?

A. Afforestation

B. Use of renewable energy

C. Fossil fuel combustion

D. Waste reduction

Question 6

a) Discuss the causes of climate change, focusing on the role of greenhouse gas emissions and land use change. [4]

b) Explain the significance of carbon dioxide and water vapour as major greenhouse gases and how they contribute to the greenhouse effect. [4]

Question 7

a) Describe the role of methane and nitrogen oxides as greenhouse gases and discuss the factors influencing their impact on the atmosphere and climate. [4]

b) Outline the major human activities contributing to increased carbon dioxide levels and discuss their implications on climate change. [4]

Question 8

a) Explain the greenhouse effect and how it plays a role in regulating the Earth’s temperature. [3]

b) Discuss strategies for mitigating and adapting to climate change, including reducing emissions, enhancing carbon sinks, and preparing for changes. [5]

Question 9

a) Define biodiversity and explain why it is important for ecosystems. [3]

b) Discuss different measures of biodiversity, including species richness and evenness. [3]

c) Identify and explain the major threats to biodiversity, including habitat destruction and invasive species. [4]

Question 10

a) Explain the concept of primary production and its significance in ecosystems. [3]

b) Discuss the role of decomposers in energy flow within ecosystems. [3]

c) Describe how energy limitations affect food chains and the length of food chains in ecosystems. [4]

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