Which best explains why a firework being ignited is an example of an exothermic reaction and not an endothermic reaction? A)The fireworks produce colors.

B)The fireworks give off heat.

C)Igniting the fireworks requires energy

D)Igniting the fireworks makes an odor.

b.false that your answer

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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