Answer: because oil is less dense than water and therefore it floats to the surface.
Explanation:
Depends on what mountain you are on
If you are on Everest, then the amount of effective oxygen available would be 6.9% (0 altitude would be 20.9)
that is why anyone should always bring oxygen tanks when climbing a high mountain
Answer:
205 bones
Explanation:
Donkeys and horses share the same skeletal system. Donkey’s bones are slow to mature in diameter and length.
Air must pass from the back to the front of the pharynx to enter the trachea and food must pass from the front to the back of the esophagus