Consider a cup made of plastic. What are the pros of using plastic?

-you are not using paper cups which results in less trees being cut down which provides more filtered oxygen for us to breath.

- You can recycle plastic so less of it is used. Plastic takes a while to deteriorate in the Earth so using less of it is good for the planet.

-Plastic is very easy to clean and doesn't usually make stains that cannot be cleaned.

Explanation:

hope this helped!

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.