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 tundra is a large habitat that is both the coldest and the driest of all biomes. The tundra biome is found in the Arctic Circle and Antarctica.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 >
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 >