... magnitude of capillary forces is thus variable, and can be much smaller or much larger than the gravitational force. An example of capillary forces exceeding gravity is capillary rise in a thin glass tube, where water is lifted upwards against the force of gravity. Most Earth materials are hydrophilic, which means that water adheres to them rather than being repelled. As a result ... , water in the unsaturated zone is preferentially drawn into small spaces over large ones, which tend to be occupied by air. In un-fractured rock, water occupies a three-dimensional network of interconnected...

• Word Count: 696
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

... others insist on calling it a proven set of facts. Although opinions are various, they both consider global warming is climate change that is leading to an increase in the overall air and water temperature. Furthermore, both opinions agree that this trend will have a great impact on Earth (Global Warming.com, 2012). Earth absorbs energy from the sun; at the same time ... , Earth re-radiates the energy back into space. Normally, the thin layer of atmosphere can trap a portion of the outgoing radiation, which keeps Earth's temperature within a comfortable region; nevertheless, the layer of...

• Word Count: 1061
• Approx Pages: 4
• Grade Level: Undergraduate

... Rocky Mountains, are already constrained by climate, and are likely to face extreme stress and disappear entirely in some places. Global warming suggests the potential for forests to break up into an assortment of forests, savannas, and grasslands. Major adjustments to natural ecosystems due to climate change could have negative consequences for our economy, which depends in part on the ... return to the atmosphere. Trees also have a crucial role in the oxygen cycle: they make up an essential part of one of the world's life support systems. Agricultural expansion into forestland is the ...

• Word Count: 700
• Approx Pages: 3
• Grade Level: Undergraduate