We use word air all the time ,but what is it?
Air is a mixture of gases that all around us . For humain life, the most important of these gases is called oxygen. When we breath in ,or inhale ,we are taking oxygen into our bodies
Another important gas in the air around us is carbon dioxid ,When we breate out carbon dioxid .All animals take in oxygen and give off carbon dioxide
Carbone dioxide is the most important gas for plants life. Plantssssssssssssssssss take in carbone dioxid and give off oxygen .This wonderful cyce is one of the things that make life on Earth possible
( تقرير عن مشاركة سيئة )، و الموجودة أسفل كل مشاركة .
2010-12-18, 16:17
What is air?
العرض العادي
