Human impacts on plants and animalsPresentation Transcript
Human Impacts on Plants and Animals 7SCIENCE: Wed., March 2nd
Review: Human Impact on the Environment We use land for many things, including: Farming Grazing Forestry – wood Landfills Industry and factories Housing! How do these affect the living things (plants animals and others) in these environments?
What happens to these living things? When humans clear land for buildings or other purposes, we disturb the environment Can you think of some ways? Land is cleared for many reasons: farms, factories, landfills, water, energy etc!
Review: Nature Preserves What is a nature preserve? Land that is not used by humans to produce something or to store waste (landfill) Illegal to take natural resources These nature preserves are important because they protect many of the earth’s ecosystems Protect the habitats (homes) ofmany living things including plants and animals Without a habitat, these living things don’t have a place to find food, water, a mate, have shelter
Who can make decisions about what to protect? Governments Nature organizations The people!
Activity: What did your lunch cost wildlife? The choice of foods that we eat, and the places and ways we produce food has an impact on the environment For example: Removing habitat for farm land Spraying fruits/vegetables with chemical pesticides, herbicides or fertilizers These chemicals can leak into the water and add to water pollution Removes insects or plants that animals may use for food These chemicals can accumulate (build up!) in human bodies and have negative effects
Activity: What did your lunch cost wildlife? Instructions: to be completed individually in full sentences, and handed in at the end of class. DO NOT have to write the questions – 15 marks (1) Please make a list of what you ate at school yesterday, at recess snacks and lunch. (5) Select one of these foods and trace its origin by drawing a flow diagram (). Describe for this food: (2) How and where it was grown? (1) How was it transported? (1) What materials were used to create the package? (3) Where could wildlife be affected along this path? (2) What are 2 changes that could be made to minimize the effect on wildlife? For example, could you eat something else? Could something be changed in producing the food to protect wildlife?