Question

give 1 example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions

Answer 1

Function. The gas exchange that occurs when stomata are open facilitates photosynthesis. Photosynthesis is the process by which plants convert sunlight into usable energy. During photosynthesis, carbon dioxide is taken in from the atmosphere through the stomata and oxygen is released as a waste product.