Science is based on fact and evidence.

yes that is correct

Explanation: Scientist sometimes know the facts but most likley know the evidence of the theory. Scientist you this evidence and facts to make a conclusion or hypothesis hope this helps :)

due to the fact that it skipped a generation we can tell it is definitely not a dominant trait, therefore it must be recessive. i think this is right let me know!

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.