Please help Which of the following means that a lens causes light rays to spread apart?
A. +di
B. -di
C. -f
D. +f

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?