Human Impact

The process in which plants use energy from the sun to convert carbon dioxide and water into oxygen and glucose.

• respiration 
• decomposition
• photosynthesis
• combustion

What is the greenhouse effect?

• the burning of fossil fuels causes gases to mix with water in the atmosphere
• ground level ozone and vehicle exhaust react in the presence of sunlight
• certain gases such as carbon dioxide act like a blanket and keep the sun's energy close to earth

Which is a cause of climate change?

• melting of sea ice
• cutting down trees
• severe storms 
• changes in plant life 

Which is an effect of climate change?

• melting of sea ice 
• burning of fossil fuels
• cutting down trees 
• vehicle exhaust

What is biodiversity?

• a population of a species 
• the growth of cities
• destruction of natural habitats
• a variety of organisms 

What is one way to prevent climate change?

• avoid dumping in storm drains
• turn off electricity when you are not using it
• pick up after your pet's litter
• open windows 

New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to

•  reduce the use of nonrenewable resources.
• increase the rate of air pollution.
• reduce the rate of homeostasis in organisms.
•  cause a loss of biodiversity in the rain forests.

1. What are renewable resources?

• . Resources that are used faster than they form

• resources that can replenish themselves over time

• resources that formed over millions of years

• resources that exist only in rural areas

1. What would Earth be like without the greenhouse effect?

• The same temperature

• a little cooler than it is now

• . Too cold to live

• a little warmer than it is now

1. Why is firewood considered to be a renewable resource?

• It can be replenished over time.

• It is used up faster than it can form.

• It is made from coal.

• It can be made synthetically.