What Is The Greenhouse Effect? The Greenhouse Effect is the atmosphere’s ability to trap heat from the sun, which causes the Earth’s climate to be warmer and more stable than it otherwise would be. Understanding The Atmosphere Our atmosphere acts like glass on a greenhouse, allowing light and heat to penetrate and warm the Earth while slowing the radiation of heat back out into space. This effect is essential for life on Earth as we know it, and it all depends on a fragile layer of gas. The atmosphere’s heat trapping capacity is significant given how small the atmosphere is relative to the Earth. How the Atmosphere Traps Heat The Sun radiates heat and light in enormous amounts. Our atmosphere traps some of the energy, like the glass of a greenhouse. As we add more greenhouse gases to the atmosphere, it is as if we are adding extra panes of glass to a greenhouse, thus increasing the atmosphere’s ability to trap and hold heat. Importance of the Greenhouse Effect Global Warming Theory Author: Brown, Nathan.
Breathingearth - CO2, birth & death rates by country, simulated real-time Wind Power Interactive, Wind Power Simulation, Wind Power Simulator Skip to this page's content Advertisement National Geographic Society P.O. Washington , DC 20090-8199 USA Inspiring people to care about the planet since 1888 Learn More » Sign In Search National Geographic Connect With Us Main Navigation Home Daily News The Magazine Maps Science Education Games Events Blogs Movies Explorers Apps Trips Video Video Home Nat Geo TV Nat Geo Wild Animals Kids News More Photography Photography Home Photo of the Day Galleries Wallpapers Photo Tips Photographers Buy Prints Newsletters Animals Home Facts Photos Animal Conservation Environment Environment Home Energy Freshwater Global Warming Habitats Natural Disasters The Ocean The Green Guide Travel Travel Home Top 10 Destinations A-Z Trip Ideas Travel Blogs Traveler Magazine Our Trips Adventure Adventure Home Gear Ultimate Adventurers Parks Blog Nat Geo Trips AllTrails Television National Geographic Channel TV Schedule Shows Kids Home Videos Animals & Pets Countries Fun Stuff Community Animal Jam Little Kids Shop Store Home Gift Finder Channel Shop Kids Shop Shop by Catalog Shop by Theme More »
Garbology Featured Activity: Waste-Less Lunch Lead your students in learning about natural resources used in common packaging materials. Challenge your students to conserve natural resources through their lunch choices. Check out this and other Garbology lessons for the classroom » Featured Activity: Conduct a Waste Assessment Do you know how much waste your school puts in landfills each week? Learn how and check out other Garbology activities » Featured Activity: Composting With the FBI The FBI turn waste into healthy soil. Bring Garbology home » Cause and effect for global warming | Time for change Cause of global warming Almost 100% of the observed temperature increase over the last 50 years has been due to the increase in the atmosphere of greenhouse gas concentrations like water vapour, carbon dioxide (CO2), methane and ozone. Greenhouse gases are those gases that contribute to the greenhouse effect (see below). The largest contributing source of greenhouse gas is the burning of fossil fuels leading to the emission of carbon dioxide. The greenhouse effect When sunlight reaches Earth's surface some is absorbed and warms the earth and most of the rest is radiated back to the atmosphere at a longer wavelength than the sun light. The major natural greenhouse gases are water vapor, which causes about 36-70% of the greenhouse effect on Earth (not including clouds); carbon dioxide CO2, which causes 9-26%; methane, which causes 4-9%, and ozone, which causes 3-7%. Global warming causes by greenhouse effect Fig 3: From which sectors do the major greenhouse gas emissions come from?
Catching the Wrong Species This article in NSTA’s December 2014 issue of “The Science Teacher” describes a classroom activity that uses engineering design to help students model modern fishing gear to minimize bycatch in the tuna fishery. (Bycatch is non-targeted marine species typically caught in fishing gear). The lesson uses the 5E instructional model (Engage, Explore, Explain, Elaborate, Evaluate) and outlines a number of techniques to deepen student understanding of the concepts the model represents. The classroom model employs common household items (e.g., different types of beans, marbles, tennis balls, and buckets) to create a model of the ocean. Working in teams, students modify their “fishing gear” prototype at least three times to target more of the species they want to catch and to minimize catching non-target species.
PlanetInAction.com - The planet is your playground Home Page OzCoasts Climate change: Visualising sea-level rise - Melbourne region - Williamstown and Rosebud to Bass Maps have been prepared for three sea-level rise scenarios of 0.5m, 0.8m and 1.1m,relevant for the 2100 period. You may notice that some of the areas highlighted as low lying and vulnerable are the same ones that are already prone to flooding in big storms. However, it is important to remember that the maps show flooding that may occur annually, or in some areas more frequently, around the turn of the century. The big storms of 2100 are likely to flood an even larger area. The sea-level rise scenarios have been combined with a nominal highest astronomical tide (HAT) value for the region, and are based on IPCC projections and more recent science. The maps are based on a simple 'bucket fill' approach and should be considered as approximate only. For more information go to frequently asked questions Note: These maps are a communication tool only and are not suitable for decision-making. Select a region by clicking on a box below. What do these maps show? Are more detailed studies required?
Predicting Insect Development Using Degree Days | Entomology ENTFACT-123: Predicting Insect Development Using Degree Days | Download PDF by Lee Townsend, Ric Bessin, and Doug Johnson, Extension EntomologistsUniversity of Kentucky College of Agriculture Since insects are cold-blooded animals, temperature plays a major role in their growth and development. There is a threshold temperature for each insect; for example, 48 degrees F for the alfalfa weevil. No development occurs when temperatures are below that level. Insects have an optimum temperature range in which they will grow rapidly. The threshold and maximum temperatures for development of an insect are used to calculate the number of degree days for a specific day. Accumulation of degree day totals usually begins in one of two ways. With integrated pest management (IPM), degree day accumulations are used to predict important events in the life of an insect. The easiest way to calculate degree days for a specific date is to add the daily high and low temperature and divide by two. References
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