Air movement caused by differences in air temperature is called wind. Wind is important to living things. It moves air causing precipitation, spreads pollen, seeds and spores of many plants. It causes evaporation of water from soil. It can blow away valuable top soil from land.
Light is another physical condition of the environment that is very important to all living things.
The amount of light and how long it is present is very important to living things. Green plants need a certain amount of light every day to make food. Different plants need different amounts of light to produce food. Plants grow toward the light. Animals depend on light to guide them.