How much energy was transferred during the phase change shown on the cooling curve above? Use the phase diagram and table of values below to help you answer the question.

U whay do you need with?

Ido not understand. 

Idon't know hope someone you

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.