Human activity can affect ecosystems by removing producers, consumers, and decomposers. What limiting factors may result from human actions, and what effects might they have on the flow of energy and matter in an ecosystem?

When scientist examine data such as historical documents, they are using the "scientific methods"

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.