http://www.youtube.com/watch?v=oJAbATJCugs
Related: Climate Changegreenhouse effect The greenhouse effect happens when certain gases—known as greenhouse gases—collect in Earth’s atmosphere. These gases include carbon dioxide (CO2), methane, nitrous oxide (N2O), fluorinated gases, and ozone. Greenhouse gases let the sun’s light shine onto the Earth’s surface, but they trap the heat that reflects back up into the atmosphere. In this way, they act like the glass walls of a greenhouse. This greenhouse effect keeps the Earth warm enough to sustain life. A Student's Guide to Global Climate Change Source: NASA/courtesy of nasaimages.org. The Earth's climate is getting warmer, and the signs are everywhere. Rain patterns are changing, sea level is rising, and snow and ice are melting sooner in the spring. As global temperatures continue to rise, we'll see more changes in our climate and our environment. These changes will affect people, animals, and ecosystems in many ways. Less rain can mean less water for some places, while too much rain can cause terrible flooding.
Nine things you need to know about climate change in 2018 4. It’s probably a good time to rethink that waterfront property Whether it’s a bach or a permanent home, a beachfront property is part of the Kiwi dream. But that dream will become an expensive nightmare. Sea levels have already risen by 20cm since the start of the 20th century and a further rise of about 30cm is expected by 2065. Even if aggressive efforts are made to reduce greenhouse-gas emissions to zero in coming decades, the sea level will continue rising for centuries.
Carbon Cycles - Lesson Summary Students are introduced to the concept of energy cycles by learning about the carbon cycle. They learn how carbon atoms travel through the geological (ancient) carbon cycle and the biological/physical carbon cycle. Marian Koshland Science Museum Human activity is causing climate change. Since the beginning of the industrial revolution, human energy use, primarily the burning of fossil fuels, has caused concentrations of carbon dioxide and other greenhouse gases to rise substantially. The evidence shows it is extremely likely that human influence has been the dominant cause of the Earth’s warming over the past 50 years. Lines of Evidence This video explains how scientists have arrived at the state of knowledge about current climate change and its causes. Source
It’s Not Your Imagination. Summers Are Getting Hotter. - The New York Times Summer temperatures in the Northern Hemisphere Extraordinarily hot summers — the kind that were virtually unheard-of in the 1950s — have become commonplace. This year’s scorching summer events, like heat waves rolling through southern Europe and temperatures nearing 130 degrees Fahrenheit in Pakistan, are part of this broader trend. The chart above, based on data from James Hansen, a retired NASA climate scientist and professor at Columbia University, shows how summer temperatures have shifted toward more extreme heat over the past several decades. To create the bell curves, Dr. Hansen and two colleagues compared actual summer temperatures for each decade since the 1980s to a fixed baseline average.
The Greenhouse Effect and Greenhouse Gasses Have you ever been inside a greenhouse on a cold winter day? It might be cold outside, but inside the greenhouse lush green plants flourish in the warmth and sunshine. Greenhouses are made of glass and are designed to hold heat inside. Our planet's atmosphere also traps energy, sort of like a greenhouse. Carbon Cycle – Origami Organelles Teach the carbon cycle in a new way! Your students will enjoy learning about the carbon cycle with our interactive model. First, they make their model using the colourful parts. Then, they use it to look at the features of the carbon cycle such as carbon stores and transfers.