The energy in most ecosystems flows through the food chain. In terrestrial ecosystems and most marine ecosystems, the energy flow starts in green plants that harvest some of the sun’s energy. The plants are then consumed by animals, bacteria and other creatures, which are themselves eaten by other creatures. At each step in the food chain, energy is lost as heat.Know More
Scientists refer to green plants as producers because they effectively produce the food for the entire food chain. Green plants use the process of photosynthesis to capture light energy, combine it with carbon dioxide and water, and then form sugars to store the energy chemically. The organisms that eat these plants are called consumers. Sometimes a distinction is drawn between primary consumers, which eat green plants, and secondary consumers, which eat other consumers.
The amount of energy present at each step in the process is much less than was in the preceding step. This means that eventually, the energy is gone, and no further energy is left. At the bottom of the food chain, organisms called scavengers feed off the last remaining bits of energy in an organism. These scavengers then release the remaining minerals and nutrients from their food into the environment where they are recycled.Learn more in Earth Science
Abiotic factors are the non-living parts of an ecosystem. The abiotic factors of Antarctica are its low temperatures, small amount of precipitation and polar ice sheet. Abiotic factors work with the biotic, or living, factors to shape the ecosystem.Full Answer >
The Earth moves by rotating or spinning on its own axis and by going around the sun in its orbit in a process called revolution. The Earth's rotation on its axis takes place at a constant speed of 1, 040 miles per hour and goes around the sun at a constant speed of 67, 000 miles per hour.Full Answer >
Glaciers move due to gravity's force that is imposed on them. The massive weight of the glacier's ice explains the typically sluggish movement of glaciers.Full Answer >
Heat can be transferred from one place to another by conduction, convection, radiation or a combination of these methods. Conduction and convection involve the movement of particles, but radiation involves electromagnetic waves.Full Answer >