“Earth’s ecosystems recycle.” Is this
statement true or false? Explain your
answer.

True - well, for example in the rainforest, when leaves fall from trees, they create a layer on the ground. This waste is then broken down, and then the nutrients it contains is absorbed into the soil. The roots of plants then absorbs these nutrients. Eventually the leaves of those plants then fall, and the cycle starts again.

helicase, i think thats it

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.