Science StarterAt night the moon is -

387F, and during the day it is 253 F.

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

Today’s Agenda

•Warm Up & Objective•Producing A Meal•Greenhouse Effect•Global Climate Change•Exit Ticket

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Daily Objective

SWBAT explain how human activities affect air quality and global warming.

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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!CODING GUIDE

Underline What is ImportantCircle what you think is important

but don’t knowBox in key terms

Summarize in Margins

Man power(to care for cattle)

cattle

2 lbs of grain

Land, topsoil lossPesticides and

fertilizers to produce

grain

Gas for transportation

Natural gas For cooking

600 gallonsOf water

Hamburger

Electricity (forHeating and

Cooking)

Gas(for transportation)

Corn oil (forcooking)

HFCs forCooling unit

Diesel-poweredharvester

Pesticides andFertilizers

7.5 gallonsOf water

10 oz ofpotatoes

Soil, farmland

5 ozOrder ofFrench

Fries

Estimating your Carbon Footprint

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

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

Think about it…

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

When incoming solar radiation (heat) is absorbed by gases in the atmosphere.

Without the atmosphere,

Earth would be as cold as space!!!!

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

Where 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

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

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

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

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Effects of Global Climate Change on Our Environment

• Overall warmer average global temperatures• Changes in weather• Glaciers melting• Rising Ocean Levels• Sea ice melting

• Polar bears dying outhttp://dsc.discovery.com/videos/global-warming-what-you-need-to-know-polar-bear-

signs.html

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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 Mr. Houtz– ____ points3.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/

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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.

Student Survey•Please fill out the survey honestly and completely by circling the appropriate number

•This will help our class become a better learning environment in the future!

•This is anonymous, so you do not have to include your name or any information beyond circling your honest opinion and behavior in the classroom

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1. What is responsible for trapping some radiation (heat) and keeping it on the Earth, much like the windows on a car trap in heat?a. Gravity c. Global Warmingb. Nitrogen and Oxygen d. Greenhouse gases

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

3. Which of the following has caused the greatest increase in global warming?a. Burning of fossil fuels such as coal, gas, and oilb. Increases in nitrogen and oxygen in the atmospherec. People breathing outd. Turning lights off

 

EXIT TICKET (1-6)

4. 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

5. The burning of fossil fuels is causing an Increase in the following:a. Atmospheric nitrogenb. Atmospheric carbon dioxidec. Atmospheric oxygen d. Atmospheric phosphate

6. The graph above shows the change in carbon dioxide concentration in Earth’s atmosphere from 1960 to 1990. The most likely cause of the overall change in the level of carbon dioxide from 1960 to 1990 is an increase in the:

a. number of violent storms c. number of volcanic eruptions b. use of nuclear power d. use of fossil fuels