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 about Earth Science
Continents rest on massive plates known as tectonic plates, which are fluid and able to move due to the mantle and magma underneath, and as the tectonic plates move about, they cause continental drift to happen. The concept of continental drift was first described in the early 20th century by German scientist Alfred Wegener, who explained that continental landmasses were actually drifting across the Earth. This is opposed to the original theory that landmasses are fixed and immobile.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 >
A food web is a comprehensive map of how energy moves, in the form of food, throughout an ecosystem, while a food chain is one specific path through the web. Most food webs on Earth derive their energy primarily, if not exclusively, from sunlight. That energy is captured by plants via photosynthesis and then distributed to the consumers in the environment.Full Answer >
A lion's niche refers to its place in its ecosystem and the lion's niche is at the top of the food chain where it is responsible for eating numerous animal species. The lion's job in its ecosystem is to help control the population of other animals in the ecosystem by hunting and eating them.Full Answer >