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
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 >
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 >
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 >
The first successful airplane was created by the Wright Brothers, Wilbur and Orville. Airplanes are fixed-wing aircraft that use a 3-axis control and are propelled through the air using engines. Airplanes are commonly used for transportation, however, they are also used for research, recreation and military purposes. The engines located on the wings of the airplane create lift, overcome drag and allow the plane to travel forward.Full Answer >