Q: Answer the following question given this paragraph: Chemical weathering is different than mechanical weathering. The minerals in the rock change their chemical makeup. They become a different type of mineral or even a different type of rock. Chemical weathering works through chemical reactions that change the rock. Q: What works through chemical reactions that change the rock? Choices: - gradual weathering - chemical breakdown - rock weathering - chemical weathering A:
A: chemical weathering

Q: Answer the following question given this paragraph: Evolution happens because of natural selection . Good traits become more common in a population. Bad traits become less common. The deer mouse, species Peromyscus maniculatus gives an example of evolution by natural selection. In Nebraska, this mouse is typically brown. But in places where glaciers dropped lighter sand over the darker soil, the mice are light. Why? Because predators could more easily spot the dark mice on light sand. The lighter mice were more likely to survive and have offspring. Natural selection favored the light mice. Over time, the population became light colored. Enough changes may take place over time that the two types of mice become different species. Q: Evolution happens because of what? Choices: - natural resources - natural change - natural process - natural selection A:
A: natural selection

Q: Answer the following question given this paragraph: Q: Ectotherms undergo a variety of changes at the cellular level to acclimatize to shifts in what? Choices: - precipitation - oxygen - air pressure - temperature A:
A: temperature

Q: Answer the following question given this paragraph: Viscosity measures a fluid's resistance to flow the higher the viscosity, the slower the flow of the material. One factor that affects viscosity is the strength of the intermolecular forces in the material. Molecules that exhibit higher intermolecular forces tend to have higher viscosities. Temperature also influences viscosity. A higher temperature results in a decrease in viscosity, since molecules are moving faster and the intermolecular forces are more easily disrupted. Most cooking oils are more viscous than water, but when heated, the viscosity decreases and the oil spreads more easily. Motor oils are ranked by viscosity. Lower viscosity oils provide less drag on the engine, but they are also used up faster than a higher-viscosity material. Q: What measures a fluid's resistance to flow? Choices: - elasticity - density - surface tension - viscosity A:
A: viscosity