Answer the following question given this paragraph: Exergonic c. Decomposition d. Catabolic, exergonic, and decomposition 18. Which of the following combinations of atoms is most likely to result in a chemical reaction? a. hydrogen and hydrogen b. hydrogen and helium c. helium and helium d. neon and helium 19. Chewing a bite of bread mixes it with saliva and facilitates its chemical breakdown. This is most likely due to the fact that ________. the inside of the mouth maintains a very high temperature b. chewing stores potential energy c. chewing facilitates synthesis reactions d. saliva contains enzymes 20. CH4 is methane. This compound is ________. Q: Chewing a bite of bread mixes it with what and facilitates its chemical breakdown? Choices: - chyme - calcium - interstitial fluid - saliva A:
saliva
Answer the following question given this paragraph: The mass lost in mass defect has gone into energy that is called binding energy. Q: The mass lost in mass defect has gone into energy called what? Choices: - momentum - enthalpy - kinetic energy - binding energy A:
binding energy
Q: Answer the following question given this paragraph: The hybridization model helps explain molecules with double or triple bonds. Consider the ethene molecule (C 2 H 4 ), which contains a double covalent bond between the two carbon atoms and single bonds between the carbon atoms and the hydrogen atoms. The entire molecule is planar. Q: Which model helps explain molecules with double or triple bonds? Choices: - salinity model - reactivity model - particle model - hybridization model A:
A: hybridization model
Question: Answer the following question given this paragraph: Oxygen chemically weathers rock by combining with a metal. Q: What element chemically weathers rock by combining with a metal? Choices: - nitrogen - carbon - hydrogen - oxygen A:
Answer: oxygen
*Question*
Answer the following question given this paragraph: Intraspecific competition happens when members of the same species compete for the same resources. For example, two trees may grow close together and compete for light. One may out-compete the other by growing taller to get more available light. As members of the same species are usually genetically different, they have different characteristics, and in this example, one tree grows taller than the other. The organism that is better adapted to that environment is better able to survive. The other organism may not survive. In this example, it is the taller tree that is better adapted to the environment. Q: When members of the same species compete for the same resources, it is called what? Choices: - interspecies competition - natural selection - extinction - intraspecific competition A:
**Answer**
intraspecific competition
(Q).
Answer the following question given this paragraph: Metals have a wide range of melting points, but most are quite high. Only one metal (mercury) melts below room temperature. Others (such as gallium) are solid at room temperature but would melt at body temperature, so they can be melted simply by holding them in your hand. On the other end of the spectrum, tungsten has a melting point of 3422C. Figure below shows the melting points of various elements in their most common pure form. Q: Name the one metal that melts below room temperature? Choices: - aluminum - gold - bronze - mercury A:
(A).
mercury