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 >
One third of the world's population lives on the coast, which covers just 4% of the world’s surface. This land is constantly being reshaped by wind and waves. Coastal forests protect inland areas from storm surges and prevent silt from clogging waterways.Full Answer >
One interesting fact about Earth is its status as the fifth planet in terms of size but the densest of all. It also ranks as the largest of the terrestrial planets in the solar system and the only one on which water exists in liquid form on its surface.Full Answer >
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 >