“Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. This process is called photosynthesis. During the process of photosynthesis, plants release oxygen into the air. People and animals need oxygen to breathe.” -http://www.mbgnet.net/bioplants/food.html
Hope this helped, good luck
Semilunar valve will be open
Geology is the study of the earth and meteorology is the study of the earths atmosphere