Q: During what period on earth was coal formed? Choices: - Mesozoic - Neoproterozoic - Neoproterozoic era - the carboniferous period A:
the carboniferous period

(Question)
Q: In science, what do we call a mathematical relationship that exists between observations under a given set of conditions? Choices: - idea - theory - fact - law A:
(Answer)
law

Ques: Q: Recent fossil evidence has shown that the evolutionary divergence of what group from other land animals was characterized by streamlining and simplifying the digestive system, which allowed a high metabolic rate? Choices: - fish - rats - marsupials - birds A:
Ans: birds

(Q).
Q: What is the process by which undigested food leaves the body? Choices: - glycolysis - digestion - peristalsis - egestion A:
(A).
egestion

Ques:Q: Acne and different types of cancer can affect what large organ? Choices: - liver - lungs - brain - skin A:

Ans:skin

Question: Q: As distance from the source increases, the area covered by the sound waves increases, lessening what? Choices: - velocity - density - duration - intensity A:
Answer:
intensity