Chemical reactions that produce heat are called exothermic reactions. Exothermic reactions involve physical or chemical changes that generate heat in various quantities, which is then dispersed into the surrounding environment. Exothermic reactions come in several forms, and require more energy to occur than they produce.
Exothermic reactions take place throughout the world and may occur in the water, land, and in the atmosphere. Examples of exothermic reactions include combustion reactions of fuels, the addition of concentrated acid to water (also called neutralization), the burning of certain substances, and the addition of water to anhydrous copper sulfate. Most exothermic reactions take place when triggered by an external catalyst, although some come from internally produced sources of heat, such as the eruption of volcanoes.
The reaction that occurs when metals oxidize and corrode is another type of an exothermic reaction, as respiration and even the decomposition of decaying plant and food matter into compost or humus. Some exothermic reactions, such as the combustion of fuels in car and plane engines, take place through mechanical means. Others, such as the decomposition of vegetable matter to waste, occur solely through natural forces. Exothermic reactions are the opposite of endothermic reactions, which result in systems absorbing heat energy from their surroundings.Learn More
Yes, snakes do sleep, though it may be hard for a novice human to determine when the snake is asleep because they are not able to shut their eyes the way people do. Snakes also do not necessarily sleep at night; rattlesnakes tend to be nocturnal, meaning they are active at night.Full Answer >
Members of the Phylum Cnidaria, which includes simple marine animals such as jellyfish, corals and sea anemones, have radial body symmetry, meaning that their bodies radiate out from a central point. Members of the Phylum Cnidaria tend to be sessile, meaning they live fixed to a certain point and do not move from place to place.Full Answer >
Gastrovascular cavities are structures that are found in primitive class of organisms called phyla, which are animals with relatively simple physical structures. Gastrovascular cavities help phyla digest food and further assist with the passage of food through their bodies. These cavities have one opening to the external environment, which allows food and waste to pass through.Full Answer >
Human beings cannot grow wings. Science has progressed to the point where researchers are able to use stem cells to grow certain body parts, but wings for people is not one of them.Full Answer >