Britney has four different materials of different masses. She decides to test their electrical conductivity by connecting each in a closed electric circuit and then measuring the amount of current that passes through them. Her results are collected in the table below. Material Mass (g) Current (A) W 10.0 0.0 X 65.0 0.0 Y 23.5 4.0 Z 82.0 0.0 Which material is most likely a metal? A. W B. Z C. Y D. X

pv=nrt

explanation:

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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