Matter can be broken down into two categories: pure substances<span> and </span>mixtures.Pure substances<span> are further broken down into elements and compounds. ... A chemical </span>substance<span> is composed of one type of atom or molecule. A </span>mixture<span> is composed of different types of atoms or molecules that are not chemically bonded</span>
Although nitrogen gas makes up 78% of the atmosphere, we can't use it because nitrogen atoms must be broken apart first before. This nitrogen is very much packed and bonded with its atoms and would be useless to use since it can't be used for plants.
Answer:
us humans need a balanced ecosystem because its what keeps us alive. when having a balanced ecosystem we have cleaned water, purified air, maintained soil, regulates our climate, recycles nutrients, and provides us with food.
Homeostasis is maintained through feedback because when one certain parameter of your body goes out of the homeostatic bounds, feedback mechanisms will message this back towards the regulatory mechanisms which are responsible for homeostasis maintenance in the first place. Another thing, other than death, which can happen would be a higher bodily temperature for example.
