Atom= C
Particle=B
Phase=D
Scientific theory=A
Goes through:
<span>Mouth
Esophagus
Stomach
The small intestine
Colon (large intestine)
<span>Rectum</span></span>
Earth is made out of a lot of different materials inclluding silicon, iron, nickel, aluminum and other metals. Of course, it's atmosphere is made out of gases including nitrogen oxygen CO2 and Carbon monoxide.
<span>by monitoring the populations of the other organisms in the ecosystem</span>
Answer:
Oxygen is inhaled so that Dioxide can be exhaled, that is just how breathing functions.
Explanation:
We require this system for our survival.