It would be the respiratory system
Once this initial energy is added, the wave travels through the medium until all its energy is transferred. In contrast, electromagnetic waves require no medium, but can still travel through one.
Answer:
The answer is A
Explanation:
It is logical because the balloon lets the student see how much gas is released in the reaction. the balloon inflates with invisible air the student will normally not see.
C. the basic unit on inheritance
Rocks are abiotic
(Soil?) is made of both abiotic and biotic materials
Sea shells are biotic
