Environment
What does it mean to modify?
To change something
This area contains a lot of trees, plants and animals
Forests
What are barriers constructed across rivers or streams?
Dams
Who uses these chemicals the most?
Farmers
Air, land and water around us
What do people use from the forests to build homes?
Wood or lumber
Building dams can have a lot of what?
Positive and negative consequences
Fertilizer
Why were the wetlands drained?
In hopes to create more farmland
What is one negative affect of cutting down forests?
Soil erosion, and death of some animal and plant life.
What is one positive effect dams can have?
Low-cost electricity, prevent floods, and store water
What are poisons sprayed on plants to kill insects and other pests that eat crops?
Pesticides
What was the negative effect of draining the wetland?
It could no longer block pollutants and it was a home for fish
What is one positive of modifying forests?
Create farmland, build neighborhoods
What does a dam require on the other side of it?
Artificial body of water
What are poisons used to kill unwanted plants, like weeds?
Herbicides
What is one positive of modifying the environment?
Hear student response
How do people modify forests?
See student response
What is one negative effect of dams? (List the example we discussed in class this week)
Flooding of homes, and forces people in some areas to move
What is one negative effect of these chemicals?
Can be poisonous to humans and animals