Question: Answer the following question given this paragraph: Most decomposition reactions require an input of energy in the form of heat, light, or electricity. Q: Heat, electricity, or light might provide what necessary input to the process of decomposition? Choices: - source - material - food - energy A:
Answer: energy

Question: Answer the following question given this paragraph: Other applications of carbonates include glass makingwhere carbonate ions serve as a source of oxide ionsand synthesis of oxides. Hydrogen carbonates are amphoteric because they act as both weak acids and weak bases. Hydrogen carbonate ions act as acids and react with solutions of soluble hydroxides to form a carbonate and water: KHCO 3(aq) + KOH(aq) K 2 CO 3(aq) + H 2 O(l) With acids, hydrogen carbonates form a salt, carbon dioxide, and water. Baking soda (bicarbonate of soda or sodium bicarbonate) is sodium hydrogen carbonate. Baking powder contains baking soda and a solid acid such as potassium hydrogen tartrate (cream of tartar), KHC4H4O6. As long as the powder is dry, no reaction occurs; immediately after the addition of water, the acid reacts with the hydrogen carbonate ions to form carbon dioxide: HC 4 H 4 O 6 (aq) + HCO 3 (aq) C 4 H 4 O 6 2(aq) + CO 2(g) + H 2 O(l) Dough will trap the carbon dioxide, causing it to expand during baking, producing the characteristic texture of baked goods. Q: Substances that act as both weak acids and bases are said to be what? Choices: - amphiphilic - hygroscopic - atmospheric - amphoteric A:
Answer: amphoteric

Question: Answer the following question given this paragraph: Flatworms The relationships among flatworms, or phylum Platyhelminthes, is being revised and the description here will follow the traditional groupings. Most flatworms are parasitic, including important parasites of humans. Flatworms have three embryonic germ layers that give rise to surfaces covering tissues, internal tissues, and the lining of the digestive system. The epidermal tissue is a single layer of cells or a layer of fused cells covering a layer of circular muscle above a layer of longitudinal muscle. The mesodermal tissues include support cells and secretory cells that secrete mucus and other materials to the surface. The flatworms are acoelomate, so their bodies contain no cavities or spaces between the outer surface and the inner digestive tract. Physiological Processes of Flatworms Free-living species of flatworms are predators or scavengers, whereas parasitic forms feed from the tissues of their hosts. Most flatworms have an incomplete digestive system with an opening, the "mouth," that is also used to expel digestive. Q: Unlike free-living species of flatworms that are predators or scavengers, what forms feed from the tissues of their hosts? Choices: - aquatic - mutualistic - herbiverous - parasitic A:
Answer:
parasitic