Q: What is the more common term for ethanoic acid, the active substance in vinegar? Choices: - methyl acid - amino acid - polymer acid - acetic acid A:
acetic acid

(Question)
Q: What is formed when the ceiling of an underground cave collapses? Choices: - hill - groundwater - mountain - sinkhole A:
(Answer)
sinkhole

Ques: Q: What do vertebrates have which invertebrates do not? Choices: - appendages - fangs - tails - backbones A:
Ans: backbones

(Q).
Q: The rate of flow of charge in an electrical circuit is known as what? Choices: - output - voltage - velocity - current A:
(A).
current

Ques:Q: Sulfate is used as a cleaning agent because it is acidic and soluble in what substance? Choices: - air - salt - oxygen - water A:

Ans:water

Q: What do nonvascular plants reproduce with? Choices: - photosynthesis - toxins - vascular plants - spores A:
spores