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