Q: What do some animals grow to protect themselves in winter? Read this paragraph and choose the correct option from the provided answers: Choices: - scales - antennae - thin skin - thicker fur A:
thicker fur

Q: The potential of what can be used to measure the ph of a solution? Read this paragraph and choose the correct option from the provided answers: Thus the potential of a galvanic cell can be used to measure the pH of a solution. Exercise Suppose you work for an environmental laboratory and you want to use an electrochemical method to measure the concentration of Pb2+ in groundwater. You construct a galvanic cell using a standard oxygen electrode in one compartment (Ecathode = 1.23 V). The other compartment contains a strip of lead in a sample of groundwater to which you have added sufficient acetic acid, a weak organic acid, to ensure electrical conductivity. The cell diagram is as follows". Choices: - electrodes cell - symbiotic cell - stimulation cell - galvanic cell A:
galvanic cell

Q: Q: Groundwater dissolves minerals and rocks into what? Read this paragraph and choose the correct option from the provided answers: Groundwater dissolves minerals and rocks into ions. Groundwater deposits those ions into different types of structures. Limestone caves are the best place to see these structures. Water erodes the cave and it has deposits structures like stalactites and stalagmites. The cave pictured here is Carlsbad Caverns in New Mexico. Choices: - gravel - sand - grit - ions A:
A: ions

Question: Q: What kind of process occurs naturally under certain conditions, unlike its opposite, which will not take place unless it is "driven" by the continual input of energy from an external source? Read this paragraph and choose the correct option from the provided answers: Spontaneous and Nonspontaneous Processes Processes have a natural tendency to occur in one direction under a given set of conditions. Water will naturally flow downhill, but uphill flow requires outside intervention such as the use of a pump. Iron exposed to the earth's atmosphere will corrode, but rust is not converted to iron without intentional chemical treatment. A spontaneous process is one that occurs naturally under certain conditions. A nonspontaneous process, on the other hand, will not take place unless it is "driven" by the continual input of energy from an external source. A process that is spontaneous in one direction under a particular set of conditions is nonspontaneous in the reverse direction. At room temperature and typical atmospheric pressure, for example, ice will spontaneously melt, but water will not spontaneously freeze. The spontaneity of a process is not correlated to the speed of the process. A spontaneous change may be so rapid that it is essentially instantaneous or so slow that it cannot be observed over any practical period of time. To illustrate this concept, consider the decay of radioactive isotopes, a topic more thoroughly treated in the chapter on nuclear chemistry. Radioactive decay is by definition a spontaneous process in which the nuclei of unstable isotopes emit radiation as they are converted to more stable nuclei. All the decay processes occur spontaneously, but the rates at which different isotopes decay vary widely. Technetium-99m is a popular radioisotope for medical imaging studies that undergoes relatively rapid decay and exhibits a half-life of about six hours. Uranium-238 is the most abundant isotope of uranium, and its decay occurs much more slowly, exhibiting a half-life of more than four billion years (Figure 16.2). Choices: - controlled process - noticeable process - activation process - spontaneous process A:
Answer: spontaneous process

*Question*
Q: Which part of the body of amphibians, easily absorbs substances from the environment? Read this paragraph and choose the correct option from the provided answers: Why are so many amphibian species threatened by extinction, and why should you care? The second question is easy. Amphibians control pests, may be a source of new medicines, and help feed many other animals. The nature of amphibian skin may help explain why so many amphibian species are at risk. Their skin easily absorbs substances from the environment, such as pollutants in water or air. Therefore, they may suffer from poor environmental quality before other animals do. As such, they may provide an early-warning system of environmental damage. Choices: - liver - scales - Eyes - skin A:
**Answer**
skin

Q: Plants obtain their energy from the sun through photosynthesis , what do animals obtain their energy from? Read this paragraph and choose the correct option from the provided answers: All organisms have the ability to grow and reproduce. To grow and reproduce, organisms must get materials and energy from the environment. Plants obtain their energy from the sun through photosynthesis , whereas animals obtain their energy from other organisms. Either way, these plants and animals, as well as the bacteria and fungi, are constantly interacting with other species as well as the non-living parts of their ecosystem. Choices: - tissues - proteins - ultraviolet rays - organisms A:
organisms