Q: Colloids are used industrially as what? Choices: - organisms - impurities - solutions - catalysts A:
catalysts

Q: What arteries carry oxygen-poor blood away from the heart to the lungs? Choices: - subclavian - femoral - aorta - pulmonary A:
pulmonary

Q: Q: What are two ways cnidarians are able to reproduce? Choices: - mitosis and meiosis - spawning and sexual - internally and externally - asexually and sexually A:
A: asexually and sexually

Question: Q: The constant "c" can be specifically used to represent the (extremely fast) speed of what? Choices: - electricity - sound - gravity - light A:
Answer: light

*Question*
Q: Ice ages, continental drift, and giant meteorites striking earth have caused what phenomenon? Choices: - gravity - waves - depletion - extinction A:
**Answer**
extinction

(Q).
Q: When electrons move from one atom to another, they become what? Choices: - particles - neons - atoms - ions A:
(A).
ions