Unit 5 Review
In which layer of the atmosphere is the ozone layer located?
How does the greenhouse effect impact the Earth's temperature?
Traps heat and causes Earth to heat up.
What is the purpose of chlorine in water treatment?
Kills bacteria and prevents new bacterial growth
What is the purpose of scrubbers in industry?
To neutralize smoke before it leaves a smokestack
How does acid precipitation form?
When pollution (like car exhaust) reacts with water vapor in the atmosphere.
Explain the thinning of the ozone layer.
Ozone is being destroyed by pollutants (like CFCs)
What is global warming?
Gradual increase in average global temperatures.
What role does carbon dioxide play in global warming?
It is a greenhouse gas
What type of light is absorbed by ozone?
How does ultraviolet light negatively impact humans and the environment?
Sunburn, cancer, blindness, damages DNA, damages plants, damages animals
What can we do to help reduce levels of carbon dioxide in the atmosphere?
Decrease emissions, use less fossil fuels, carpool, etc.
What are chlorofluorocarbons?
CFCs, which are chemicals that destroy the ozone layer.
What has happened to the average global temperature during the 20th century?
It has increased overall.
What are the consequences of increased global temperatures?
Extinction, melting icecaps, flooding, increased sea level, famine, death, and destruction.
What is the largest percentage of waste produced by U.S. households? (i.e. what kind of waste?)
How do mountains form?
When tectonic plates collide
Where does most geologic activity occur?
The boundary between tectonic plates
What are the layers of the Earth?
Crust, Mantle, Outer Core, Inner Core; Lithosphere, Asthenosphere, Mantle, Outer Core, Inner Core
How is energy transferred?
Convection (circles), Conduction (direct), and Radiation (through space)
Can break down naturally.
Where all life is found
Melted rock inside the Earth
The area of land that drains to a common water source
Widespread malnutrition and starvation due to a shortage of food, often caused by a catastrophic event.
Partly decomposed organic material, such as manure and plant waste
A technique in which genetic material in a living cell is modified for medical or industrial use.
The accumulation of pollutants at successive levels of the food chain, with the most pollutants being found at the top of the food chain.
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