An illustration of the Monteverde Cloud Forest is shown below. Which of the following is a biotic
factor visible in the image?

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?