For questions 14-16 pick out the variables that will be needed to answer the following question: Do trees grow faster if it is wetter in the summer? 14) What is the independent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth

15) What is the dependent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth

16) What is the control?
a.) amount of rain
b.) no rainfall
c.) amount of growth

14) A. amount of rain

15) C. amount of growth

16) B. no rainfall

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

i dont know the answe