Answer the following question given this paragraph: The acidity of a solution is typically assessed experimentally by measurement of its pH. The pOH of a solution is not usually measured, as it is easily calculated from an experimentally determined pH value. The pH of a solution can be directly measured using a pH meter (Figure 14.4). Q: The acidity of a solution is typically assessed experimentally by measurement of its what? Choices: - mass - density - color - ph A:
ph
(Question)
Answer the following question given this paragraph: It may seem as though burning destroys matter, but the same amount, or mass, of matter still exists after a campfire as before. Look at the sketch in Figure below . It shows that when wood burns, it combines with oxygen and changes not only to ashes but also to carbon dioxide and water vapor. The gases float off into the air, leaving behind just the ashes. Suppose you had measured the mass of the wood before it burned and the mass of the ashes after it burned. Also suppose you had been able to measure the oxygen used by the fire and the gases produced by the fire. What would you find? The total mass of matter after the fire would be the same as the total mass of matter before the fire. Q: It may seem as though burning destroys matter, but the same amount of what, still exists after a campfire as before? Choices: - termperature - concentrations - energy - mass A:
(Answer)
mass
Ques: Answer the following question given this paragraph: water. Sulfur, critical to the 3D folding of proteins (as in disulfide binding), is released into the atmosphere by the burning of fossil fuels, such as coal. The cycling of these elements is interconnected. For example, the movement of water is critical for the leaching of nitrogen and phosphate into rivers, lakes, and oceans. Furthermore, the ocean itself is a major reservoir for carbon. Thus, mineral nutrients are cycled, either rapidly or slowly, through the entire biosphere, from one living organism to another, and between the biotic and abiotic world. Q: What element is released into the atmosphere by the burning of fossil fuels? Choices: - carbon - helium - oxygen - sulfur A:
Ans: sulfur
(Q).
Answer the following question given this paragraph: Exocytosis The reverse process of moving material into a cell is the process of exocytosis. Exocytosis is the opposite of the processes discussed above in that its purpose is to expel material from the cell into the extracellular fluid. Waste material is enveloped in a membrane and fuses with the interior of the plasma membrane. This fusion opens the membranous envelope on. Q: The reverse process of moving material into a cell is the process of what? Choices: - endocytosis - proteolysis - osmosis - exocytosis A:
(A).
exocytosis
Ques:Answer the following question given this paragraph: The human nerve cell in Figure below is a good example of a specialized animal cell. Its shape suits it for its function of sending nerve signals to other cells. A nerve cell couldn't take this shape if it were surrounded by a rigid cell wall. Q: With a shape that specially suits its function of sending nerve signals to other cells, the human nerve cell is an example of what? Choices: - adaptation - maturation - evolution - specialization A:

Ans:specialization
Ques: Answer the following question given this paragraph: Chemical reactions that release energy are called exothermic reactions . An example is the combustion of methane described at the beginning of this lesson. In organisms, exothermic reactions are called catabolic reactions . Catabolic reactions break down molecules into smaller units. An example is a decomposition reaction, such as the breakdown of glucose molecules for energy. Exothermic reactions can be represented by the general chemical equation:. Q: What type of reactions are chemical reactions that release energy? Choices: - sulfuric reactions - biochemical reactions - ozonic reactions - exothermic reactions A:
Ans:
exothermic reactions