% of the earth’s surface is covered in a relatively thin layer of water A. 25 B. 50 C. 75 D.85

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?