Answer:
Combustion
Explanation:
Combustion is the chemical reaction that happens when fuel burns.
Answer:
a hygrometer consisting of a wet-bulb and a dry-bulb thermometer, the difference in the two thermometer readings being used to determine atmospheric humidity.
a hygrometer is an instrument for measuring the humidity of the air or a gas.
Passive transport is a movement of biochemicals and other atomic or
molecular substances across cell membranes without need of energy input.
Unlike active transport, it does not require an input of cellular
energy because it is instead driven by the tendency of the system to
grow in entropy.
Hope this helps :p