Do Now! At night the moon is -387 F, and during the day it is 253 F.

Why do you think temperatures are so much more extreme on the moon than on earth?

What do you know about global warming? What is the cause?

*Explain your answers in complete sentences

Agenda• What did it take to produce this American

Meal?• Calculating your Carbon Footprint• Global Warming Notes + Video Clips• Graph it!• Exit Ticket• HW: Begin studying for Midterm Exam

(Units 1,2,3,4)2

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Population Growth Review1. What is the impact of population

growth on the environment?

2. In THE LORAX, what happened to the native plant and animal species as the Once-ler population increased?

3. What actions can WE take to minimize the negative environmental impacts of human population growth?

What Did it Take to produce this American Meal?

• Have you had an “American Meal” lately?• What goes into making a hamburger, soda, and

fries?• Read and ANNOTATE this article to get an idea!

Ms. Goswick’s CODING GUIDE

Underline What is ImportantCircle what you think is important

but don’t knowBox in key terms

Summarize in Margins

Hamburger

Man power(to care for

cattle)

cattle

2 lbs of grain

Land, topsoil loss

Pesticides and fertilizers to produce

grain

Gas for transportation

Natural gas For cooking

600 gallonsOf water

5 ozOrder ofFrench

Fries

Soil, farmland

10 oz ofpotatoes

7.5 gallonsOf water

Pesticides andFertilizers

Diesel-poweredharvester

HFCs forCooling unit

Corn oil (forcooking)

Gas(for

transportation)

Electricity (forHeating and

Cooking)

Estimating your Carbon Footprint

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• Carbon Footprint: a measure of all the greenhouse gases we individually produce; determines the impact our activities have on the environment

• What’s your carbon footprint? TAKE THE QUIZ AND FIND OUT!

CO2 Negative?

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http://www.alternativee.org/renewable-energy/danish-island-co2-negative/

Think about it…In the summer, why does the inside of a car get very hot when it is sitting in the sun?

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The heat from the sun goes into the car. The windows on the car trap the heat inside. This makes the inside of the car heat up

GREENHOUSE EFFECTWhen incoming solar radiation

(heat) is absorbed by gases in the atmosphere.

Without the atmosphere, earth

would be 59 F colder!

(Just like the windows in a car trap heat, the gasses in the atmosphere trap heat.)

GREENHOUSE EFFECT

What traps the heat?•Water vapor (H2O)• Carbon dioxide (CO2)

•Nitrous oxide (N2O)•Methane (CH4)• These are called “greenhouse gases.”

• The more greenhouse gases in the troposphere, the warmer our planet gets.

GREENHOUSE EFFECTGreenhouse gases

Greenhouse gasWhere does it come from?

How good is it at trapping heat? (global warming potential)

Carbon dioxide (CO2)

Methane (CH4)

Nitrous oxide (N2O)

CO2 has a global warming potential of only “1,” but it is the most abundant.

Carbon dioxide is the most important greenhouse gas

Global warming potential = how good a gas is at trapping heat.

GREENHOUSE EFFECT

Carbon dioxide comes from burning fossil fuels

CO2 is at its highest atmospheric level in at least 400,00 years.

Living organisms that once held carbon are being deforested.

GREENHOUSE EFFECT

Cutting down trees decreases the amount of CO2 removed from the atmosphere

FAST FACT

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The human population of the world is expected to be nearly tripled by the year 2100

GREENHOUSE EFFECT

Methane is the second most important greenhouse gas.

• 14% of greenhouse gases come form cow burps & some “flatulence”

• Methane also comes from fossil fuel production and waste disposal

Methane has a global warming potential of “23.”

GREENHOUSE EFFECT

Nitrous Oxide (laughing gas)

• One source is feedlots (the place the cows are kept before slaughter).

• Nitrous oxide is also released from chemical manufacturing plants and from automobiles.

• It can also be released from nitrogen fertilizers used on farms.

Nitrous oxide has a global warming potential of “296.”

CO2

Nitrous oxidemethane

water vapor

Temperature (Northern Hemisphere)

CO2 Concentrations

1000 Years of CO2 and Global Warming-Graph It!

Deg

ree

Cel

sius

Incr

ease

Part

s Pe

r Mill

ion

Year Year

10

00

1200

1400

1600

1800

2000

1000

1200

1400

1600

1800

2000

• We’re seeing increased global temperatures as a result of increased greenhouse gasses

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GLOBAL WARMING

Effects of Global Climate Change on Our Environment

• Overall warmer average global temperatures

• Glaciers melting• Rising Ocean Levels

– Polar bears drowning

http://www.youtube.com/watch?v=W0F-RmOswOs

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• What’s our class’s average Carbon Footprint and what does this mean?

1. Total Carbon Footprint for an individual in Somalia – 9 points (probably even less)

2. Total Carbon Footprint for Ms. Goswick3. The right way to find out your carbon footprint is with lbs., but we are using a

point system…http://www.footprintnetwork.org/en/index.php/GFN/page/calculators/

• Okay, so how does that play out around the world??

http://www.stumbleupon.com/su/5LFyHa/www.breathingearth.net/

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What’s being done now to reduce our emissions?

Solar Power Wind Power Fuel-Efficiency

Simple Things To Do Turn off your computer or the TV when you’re not using it.

Take shorter showers. Heating water uses

energy.

Keep rooms cool by closing the blinds, shades, or

curtains.

Turn off the lights when you leave a room.

Use compact fluorescent bulbs.

HOT Questions• Driving it home!• Can you answer all of the hot questions

for today??

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1. Which of the following are examples of greenhouse gases?a. Hydrogen c. Carbon Dioxideb. Oxygen d. nitrogen

2. Which of the following has caused the greatest increase in global warming?a. Burning of fossil fuels such as coal, gas, and oil c. People breathing outb. Increases in nitrogen and oxygen in the atmosphere d. Turning lights off

3. Which of the following is a likely effect of global warming?a. Glaciers will increase in size c. Ocean levels will riseb. More trees will grow d. Ocean levels will decrease

4. The burning of fossil fuels is causing an increase in the following:a. Atmospheric nitrogen c. Atmospheric oxygen b. Atmospheric carbon dioxide d. Atmospheric phosphate

 5 Which is the primary cause of the overall increase in carbon dioxide from 1960 to:a. number of violent storms c. number of volcanic eruptions b. use of nuclear power d. use of fossil fuels  

EXIT SLIP