Which of the following is NOT needed for a hurricane to form? very cold ocean waters (under 60 F)
atmosphere to cool quickly with height
very little change in wind speed or direction as the air races upward
some sort of pre-existing low-level disturbance

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

me and my friend did 2

the answer is c a tornado