Science: Earth and Space: Quiz 3

general term for a substance containing two or more elements bonded together

(a)  

makes fruits "firm up" properly

(a)  

main function is to contribute to the general health of a plant and improve disease resistence.

(a)  

stimulates the growth of stems and leaves

(a)  

what is the process by which nitrogen is moved from the air to the soil to be used by plants and returned to the atmosphere to be used again?

(a)  

any member of the group of chemicals that contain phosphorus bonded to oxygen and other elements

(a)  

what type of bacteria converts nitrogen to ammonia, nitrates, and other nitrogen compounds?

(a)  

what word means "a nourishing substance"?

(a)  

what is the general term for a substance composed of only one type of atom?

(a)  

what type of bacteria converts nitrates in the soil into atmospheric nitrogen?

(a)