Question

25. How have catalysts improved the use of pomace? (1 point)
A. They speed up the process of extracting nutrients from pomace, making it more efficient
B. They prevent the pomace from spoiling during processing
C. They alter the composition of pomace to make it more flavorful
D. They help convert pomace into energy more quickly

26. What is a functional group in a molecule? (1 point)
A. A chemical element that contributes to a molecule’s mass
B. A type of bond that holds molecules together
C. A specific arrangement of atoms in a molecule that reacts in a certain way
D. A part of a molecule that determines its color

27. Why is Kevlar so strong? (1 point)
A. The molecules in Kevlar form a cylindrical-like structure
B. The molecules stack together in crystal-like structures
C. Kevlar is made with spider silk, a naturally strong material
D. The molecules are short and create density

28. What are some refinements that have optimized the ore-mining process? (1 point)
A. Increasing the temperature of the ore without using any additional technologies
B. Using traditional methods without any new technologies
C. Using pure oxygen instead of air in smelting to speed up the process
D. Adding more water to the mining process to reduce environmental impact

29. There are several ways to optimize metal extraction. Which way also optimizes environmental impact? (1 point)
A. Using enormous trucks to carry larger loads
B. Sifting ore at the site before transporting
C. Crushing only the best quality ore
D. Dumping waste rock near the plant

30. Why are alloys used instead of pure metals? (1 point)
A. Alloys have desirable properties, such as improved strength, flexibility, or resistance to corrosion
B. Alloys are less malleable and more brittle than pure metals
C. Alloys are always cheaper to produce than pure metals
D. Alloys have no practical uses compared to pure metals

Answer 1

25. A
26. C
27. B
28. C
29. B
30. A