B18 - Biodiversity and ecosystems
Independent learning
Introduction
In this unit we will look at the effect the growing human population is having on ecosystems and biodiversity, including the effect of land, water and air pollution. We will also look at the positive impact humans are having in trying to maintain biodiversity and the effect this is having.
Specification links:
Task 1: Know
Task 1a: Use look, cover, write check and quizlet to learn the answers to the core questions and the keywords for this topic
Learn
Task 2: Human effect on ecosystems - 1
Task 2b: Make notes that:
Define biodiversity and explain why it is so important
List the causes of human population growth
Describe the negative effects of deforestation and peat bog destruction.
List the other causes of land pollution
Task 2c:
Describe the trends seen in the graphs.
Explain the trends seen in the graphs.
Task 2d: Answer the exam question and self mark:
Task 3: Human effect on ecosystems - 2
Task 3b: Make notes that:
Define eutrophication and bioaccumulation
List the causes of air pollution and the negative effect they can have.
Describe the greenhouse effect and define global warming
List potential consequences of climate change
List the ways we can measure pollution
Task 3c: Complete the progress quiz
Set 2 & 3 go to task 5 now
Task 4: The impact of change - Set 1 only
Task 4c: Answer the exam questions and self mark
Task 5: Maintaining biodiversity
Task 5c: Describe and explain the trend seen in the graph
Set 2 & 3 go to task 10 now
Task 6: Trophic levels - Set 1 only
Task 6b: Make notes that:
Define trophic level, apex predator and decomposer
Draw a food chain involving 4 organisms
Label the producer, primary consumer, secondary consumer and tertiary consumer
Label each trophic level
Define biomass and explain the difference between dry and wet biomass.
Describe the differences between a pyramid of biomass and pyramid of numbers.
Task 6c:
1. Use the data provided to draw a pyramid of biomass
2. Calculate the percentage change in biomass between:
i) The producer to the primary consumer
ii) The primary consumer to the secondary consumer
3. Suggest why biomass decreases at each trophic level.
Task 6d: Answer the exam question and self mark
Task 6e: Complete the progress quiz
Task 7: Biomass transfers - Set 1 only
Task 7c:
Use the data provided to calculate the percentage of biomass lost at each trophic level.
Calculate the efficiency of the energy transfer at each trophic level
Task 7c: Answer the exam question and self mark
Task 8: Food security and production - Set 1 only
Task 8b: Make notes that:
Define food security
List the biological factors that are affecting food security.
List the ways to improve the efficiency of food production.
Evaluate the use of factory farming to increase the efficiency of food production (advantages and disadvantages and come to an overall conclusion)
Task 8c: Use data from the graph to explain how changin diets in one country can affect food security in another. (6 marks)
Task 8d: Answer the exam question and self mark.
Task 9: Sustainable food production - Set 1 only
Task 9b: Make notes that:
Describe how we can reduce the length of food chains.
Describe how we can reduce waste.
Describe overfishing and list the ways in which we can manage fish stocks.
Answer the questions on slide 13 and self mark using slide 14.
State what mycoprotein is and give the conditions needed to produce it.
List the ways genetic modification can be useful in making food production more sustainable.
Task 9c:
Task 9d: Answer the exam question and self mark.
Task 10: Summary
Task 10a: Watch the video
Task 10b: Complete the seneca learning unit for your set.
Task 10c: Make a mind map or single page revision summary of this topic and add it to your revision folder.