U3 KA 5 Food Production
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each of the black spaces below before clicking
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| Why are humans having to increase food production? | Because of the increase in the Human Population
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| What are the 2 main methods of increasing food production? | 1. Increasing the area of land dedicated to raising crops & 2. Increasing the efficiency of crop yield.
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| What is a major environmental consequence of increasing the area of land dedicated to growing crops | 1. Deforestation OR 2. Habitat destruction OR 3. Desertification
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| What do plants need Nitrates for? | To make amino acids
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| What 2 types of Chemicals are used to increase food productivity (Crop Yeild)? | 1. Fertilisers & 2. Pesticides
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| What is an environmental consequence of fertiliser use? | Fertilisers Leaching (leaking) into fresh water causing Algal bloom
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| What effect do algal blooms have on Biodiversity? | Reduces Biodiversity
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| How do algal blooms reduce Biodiversity? | 1. Reduce light entering water 2. Less photosynthesis 3. Less oxygen produced 4. Death of fish
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| What effect does death of fish have on bacteria numbers? | Bacteria increase
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| What effect does bacterial increase have on aquatic (water) oxygen | Decreases aquatic Oxygen
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| What are Indicator species? | Species that by their presence or absence indicate environmental quality/pollution levels
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| What is an Environmental Consequence of Pesticide use? | Accumulates in the bodies of organisms over time
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| What is the name for Chemicals (pesticides) building up in organisms over time? | Bioaccumulation
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| What is an alternative to using Pesticides? | Biological control
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| What is an alternative to using fertilisers? | Genetic Modification of crops
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| Give an example of Biological control | Increasing ladybird numbers to kill greenfly
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Created by:
nscobie
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