Human Impact NSD 131 8th Grade

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.

A natural resource that can be replaced at the same rate at which the resource is consumed.

• nonrenewable resource
• renewable resource
• oil
• gas

A nonrenewable energy resource formed from the remains of organisms that lived long ago; examples include oil, coal, and natural gas.

• oil
• coal
• fossil fuels
• natural gas

The natural resources used by society are limited by various factors. Why is coal considered a nonrenewable resource?

• Once coal is used up, it can never be replaced.
• Coal is a nonrenewable resource, because it comes from the impact of meteors with the Earth
• Coal was a renewable resource, until it was mismanaged by humans
• Coal is considered a nonrenewable resource, because it takes millions of years to form

How can people reduce the amount of resources they use?

• make more landfills and garbage dumps
• buy products with lots of packaging 
• use water, electricity, and gas conservatively and recycle metal, paper, and glass
• Think only about what you need right now and don’t worry about the future

What are some bad things attributed to population growth?

• autism & genetic diseases
• religious conflict
• low wages & unemployment
• burning fossil fuels & increased CO2 production

Increased carbon dioxide may cause global warming by trapping more ____________ in the atmosphere.

• water
• gases
• heat
• water vapor

How does the concentration of carbon dioxide in the atmosphere affect climate?

• As carbon dioxide concentrations increase, temperatures increase
• As carbon dioxide concentration increase, temperatures decrease.
• Carbon dioxide concentrations have no affect on climate
• As carbon dioxide concentrations increase, temperatures become more random.

What is one way that carbon enters the atmosphere?

• Sunlight
• Vehicle emissions/Exhaust
• Ocean uptake
• Rain

How does atmospheric carbon dioxide affect global temperature?

• more CO2, lower temperature
• less CO2, lower temperature
• less CO2, higher temperature
• more CO2, higher temperature