Chapter 14 Lesson 3
Two sources of CO2
burning fossil fuels, deforestation
Greenhouse gases include ____________ ____________, water vapor and methane.
carbon dioxide
When fossil fuels are burned, ________________ enters the atmosphere.
carbon dioxide
Some scientists think that global warming is the result of natural _______________ cycles.
climate
The burning of fossil fuels releases aerosols, which can _________ the climate.
cool
Climate change causes more water to ______________ producing ______________ and ____________ storms.
evaporate, heavy rainfall, frequent
Climate change causes ___________ weather events to become more common.
extreme
Most aerosols ________________ sunlight into space and form small-droplet clouds that cool the atmosphere.
reflect
Melting glaciers and ice sheets cause sea level to
rise
Climate change melt the frozen ___________ in the Arctic, changing _______________ patterns.
soil, migration
Examples of alternative fuels are:
solar energy and wind energy
Powerful ______________ are used to solve the equations.
super computers
Deforestation
the large-scale cutting and/or burning of forests
global warming
the rise in Earth's average surface temperature during the past 100 years
aerosols
tiny liquid or solid particles in the atmosphere
Greenhouse Gases
gases in the atmosphere that absorb Earth's outgoing infrared radiation
The rise in Earth's surface temperature during the past 100 years is called _______________________
global warming
Many scientists believe that global warming is caused by the enhanced
greenhouse effect
Some scientists think that the most of this temperature change is the result of ________________ activity.
human
_______________ sources of carbon dioxide include burning fossil fuels.
human
Global warming is due mostly to
human activities
In 2007, the Intergovernmental Panel on Climate concluded that most of Earth's temperature increase is due to
human activities
The latest warming trend has been greatest in the northern hemisphere, especially in the ____________
Artic
Deforestation increases __________________ in the air because there are fewer trees to use the gas.
CO2
The greenhouse effect is increasing because of increasing levels of __________ in the atmosphere.
CO2
_________, methane and water vapor are greenhouse gases.
Carbon Dioxide
A ______ is a set of complex equations that are used to predict future climates.
GCM
________________ sources of carbon dioxide include volcanic eruptions, forest fires and cellular respiration.
Natural
One positive and one negative effect of global warming on Earth is:
Positive: hotter temperatures could decrease illness more CO2 could help crops grow more precipitation can help rain forest grow Negatives: increase in species dying from loss of habitats and food warmer temperatures lead to death ice is melting quicker
global climate model
a set of complex equations used to predict future climates
A way to reduce pollution and greenhouse gases in the future is to develop _____________ fuels.
alternative
Warmer temperatures melt frozen soil in the
arctic
Earth's average temperatures have been _____ for the last 100 years.
increasing
deforestation
is the large-scale cutting or burning of forests.
The results of the solutions are shown on a
map
Climate change ________ glaciers and polar ice sheets and cause _________ __________ to rise.
melt, sea level
Three sources of natural sources of CO2 are:
volcanic eruptions, forest fires, cellular respiration
Excess carbon dioxide in the atmosphere can have a _____________ effect on the climate.
warming
Warmer temperatures cause more ___________________________ from the oceans and change rain patterns worldwide.
water to evaporate
