Fire is created through quantum reactions with the air. The air excites the molecules and they emit photons, which are what we see when we look at flames.Know More
Fire has been used for around 1 million years for cooking food in a controlled manner and for lighting. Candle flames burn at about 1000 degrees Celsius but the color of the flame depends on the substance being burned. Calcium provides a red flame; sodium delivers a yellow flame and barium gives a greenish flame.
Fire requires heat, oxygen and and fuel to burn. Though wildfires can be quite dangerous in many circumstances, controlled burning is used for burning down brush in forests to stimulate ecological growth.Learn more about Earth Science
The Hubbard Glacier is the largest tidewater glacier in North America. A tidewater glacier is one that flows into the ocean. The glacier is approximately 7 miles wide at its foot and 76 miles long. These measurements are constantly changing as the Hubbard Glacier continues to grow and move forward.Full Answer >
A sea cave, also called a littoral cave, begins as a small crack or weak spot in a cliff beside the sea. Ocean waves – salty water full of gravel and sand pound against this spot for centuries, slowly enlarging it and hollowing out a cave in the side of the cliff.Full Answer >
Wetlands serve as some of the most complex and important ecosystems on Earth, providing habitat for many plants and animals, collecting and filtering water, and reducing the amount of damage from floods and heavy rainfall. Wetlands go by many alternative names, including swamps, marshes and bogs. They vary slightly in physical composition; some wetlands contain primarily trees, while others contain brush and shrubs, but all perform equally important ecological roles.Full Answer >
Fresh water is turned into an iceberg by the splitting or calving of glaciers. Bergs also vary wildly in shape and can be steep or irregular with rounded or flat tops. Because wind and water erode them, they constantly shift shape.Full Answer >