Index of Investigations

A Changing Cosmos

Using Star Maps
CCD Image Color Coding
Browsing the Universe
Size and Scale of the Sun
Parallax
A Law of Brightness
Star Magnitudes
A Cepheid Variable Star
Observing Color and Temperature
Measuring the Color of Stars
How Filters Work
HR Diagrams of Star Clusters
Finding Supernovae
Eclipsing Binary Stars
Tracking Jupiter’s Moons
Asteroid Searches
Exoplanet Transits
Hubble’s Law

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A New World View

Create Your Own Ecosystem
Tree Impact Study
Measuring Old Growth Forest Loss
Satellite Views of Rondonia, Brazil
Analyze Your Own Ecosystem

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ABCs of DEW Software

Newsprint and Video Displays
Creating Colors
Pixels and Digital Images
Color of A Pixel
Switching Colors
Spatial Analysis: Length
Spatial Analysis: Area
LEDs as Light Sensors
False Color Surface Features
Changes in Mt. St. Helens
Introduction to Picture Posts
What Parent Do You Most Look Like?
The Color of the Sky

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Climate Change

How has the debate changed in the past 10 years?
Two Prisms
Infrared Energy and Your TV
Why Do Some Molecules Absorb Infrared Energy?
Getting a Piano to Sing to You
Sampling Carbon Dioxide
The Findings from Mauna Loa
What Are the Human-Caused Sources of Carbon Dioxide? Personal Opinion Essay

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Ecosystem Change

Make a Model Ecosystem
Mapping Future Wetlands
Decomposition in a Bag
How Do Cultures Affect Ecosystems?
Environmental Savings for Recycling

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Energy Flow

Observing Convection Currents and Plumes
Experimenting With Equilibrium
Heat Trappers, Inc
Pencil Model of Sunlight Beams

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Energy Use

Recent History of Energy Use
Doing Work to Create Electricity
Using Electricity to Do Work
Energy Transformations
How Much Energy?
Home Heating Dilemma
The Future of Electric Power Production
Fuses and Circuit Breakers
Electric Metering
What Are We Paying For?
Power Failure
Comparing Light Sources
Method 1: Life Cycle Cost
How Does the Thermos™ Bottle Know?
Compute the R-Value of a Material
Refrigerators
Exploring a Refrigerator
Automobile Energy Transformations
Better Batteries
Energy from Sunshine
Payback Time
Your Vote on Energy Measures

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Life and Climate

Can You Observe the Effects of Air Pressure
A Scale Drawing of Our Planet
Timeline I
Simulating Half-Life
Decay With Pennies
Observing Convection Currents
Dissolving Rocks
How Did the Eskimos Survive?
Timeline II
What Does Earth’s Past Tell Us About Our Future?

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Losing Biodiversity

Biodiversity Assessment
Estimate the Number of Bison Killed
Graph the Population of the Buffalo
Biodiversity Issues
Simulate Natural Selection with "Beetles"
Ideas for Research Projects
Hybrid Cross Coin Toss
Comparing Soils
Product Research

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Ozone

Spectrum of the Sun
Just How Fast Is Melanoma Increasing?
Sunscreens and Clothing
Sunglasses and UV Protection
The Effect of Increased UV on Plants
Ozone Monitoring
Measuring Lung Capacity

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Population Growth

Population Growth Behavior
Alien Invaders
Making Graphic Representations of Population Behavior
Human Thermostat
How Many is a Billion?
Bacterial Growth and Populations
What Do You Mean? It’s Only a Drop in the Bucket!
Adding Armadillos
Grasshopper Mark and Recapture
Moldy Bread
Verhulst’s Population Equation
Playing with the Population Equation
Optimum Number of Offspring
Advantages and Disadvantages of Sexual Reproduction
Research on the Internet
Earlobes: A Study of Human Gene Frequencies
Dunkers Blood Types
Health Care and Population Growth
Too Many People?
Doubling Time
Population Growth in the United States
How Much Land Does It Take To Produce Your Food?
The Cost of an Afternoon’s Entertainment
Has China Realized Its Goals?
Population Control—Cultural Comparisons
Difficult Questions
The Quality of Your Life
The Road Not Taken

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