Question

Henry is in the community investigating sources of chemical energy for his science experiment. Select the best examples of chemical energy Henry can use.

(A)A gas station and people playing hopscotch
(B)A squirrel eating acorns and a fire burning
(C)Someone reading a book and eating a sandwich
(D)Someone sliding down the slide and someone drinking water

Answer 1

Henry can use the squirrel eating acorns and a fire burning.

Option: B

Explanation:  

• Eating is a chemical process since it is irreversible and the initial products can't be obtained back.

• While eating the food is digested by chemical enzymes which act as a catalyst.  

• So the reaction is chemical reaction. Similarly when fire is burnt the coal is changed into ashes.  

• This is combustion reaction and takes place in the presence of oxygen. Hence combustion is also a chemical reaction.  

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Answer 2

Answer:

a

Explanation: