Question | Answer |
Why are humans having to increase food production? | Because of the increase in the Human Population |
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. |
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 |
What do plants need Nitrates for? | To make amino acids |
What 2 types of Chemicals are used to increase food productivity (Crop Yeild)? | 1. Fertilisers & 2. Pesticides |
What is an environmental consequence of fertiliser use? | Fertilisers Leaching (leaking) into fresh water causing Algal bloom |
What effect do algal blooms have on Biodiversity? | Reduces Biodiversity |
How do algal blooms reduce Biodiversity? | 1. Reduce light entering water 2. Less photosynthesis 3. Less oxygen produced 4. Death of fish |
What effect does death of fish have on bacteria numbers? | Bacteria increase |
What effect does bacterial increase have on aquatic (water) oxygen | Decreases aquatic Oxygen |
What are Indicator species? | Species that by their presence or absence indicate environmental quality/pollution levels |
What is an Environmental Consequence of Pesticide use? | Accumulates in the bodies of organisms over time |
What is the name for Chemicals (pesticides) building up in organisms over time? | Bioaccumulation |
What is an alternative to using Pesticides? | Biological control |
What is an alternative to using fertilisers? | Genetic Modification of crops |
Give an example of Biological control | Increasing ladybird numbers to kill greenfly |