22.-26 Fill in the blank. The Cell Theory states: All
things are composed of
are the basic unit of structure and
in living things.
New cells are created from

1.living things

2.cell

3.cell

4.function

5.pre existing cell

Explanation:

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.