Q: What often involves the loss of hydrogen, the gain of oxygen, or the loss of electrons? Choices: - decomposition - precipitation - carbonation - oxidation A:
oxidation

(Question)
Q: What is pollution that enters water at just one point called? Choices: - entry point pollution - point supply pollution - point supply pollution - point source pollution A:
(Answer)
point source pollution

Ques: Q: Archaeans produce what kind of gas as a waste product? Choices: - sulfide - carbon monoxide - carbon dioxide - methane A:
Ans: methane

(Q).
Q: What is the only class of animals that has hair? Choices: - reptiles - amphibians - birds - mammals A:
(A).
mammals

Ques:Q: Duplicated chromosomes are composed of two sister what? Choices: - karyotypes - eukaryotes - nucleotides - chromatids A:

Ans:chromatids

Ques: Q: In this type of reaction, an element replaces another element in a compound, and the element is in any state of matter but is not an ion? Choices: - double-replacement reaction - replication reaction - polar reaction - single-replacement reaction A:
Ans:
single-replacement reaction