1930 dust bowl in the great bowl was cause by

The dust bowl was caused by an over farming of soil and an intense drought. This in turn caused the soil to become very dry and sand like, which cause dust storms, which is how it got its name "The Dust Bowl"

Explanation:

You can look this up about anywhere really, but we just finished a section on the dust bowl in my history class.

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.