Given a scientific question, generate a correct answer to it.

Input: Consider Input: What phenomenon makes global winds blow northeast to southwest or the reverse in the northern hemisphere and northwest to southeast or the reverse in the southern hemisphere?

Output: coriolis effect

Input: Consider Input: What animal group can be found in every environment on earth, but primarily in the warm and moist tropics?

Output: insect

Input: Consider Input: What term means the force of attraction that holds together oppositely charged ions?
Output: ionic bond