Q: Since electrons are charged, their intrinsic spin creates a what? Read this paragraph and choose the correct option from the provided answers: We already know that the magnitude of angular momentum is quantized for electron orbits in atoms. The new insight is that the direction of the orbital angular momentum is also quantized. The fact that the orbital angular momentum can have only certain directions is called space quantization. Like many aspects of quantum mechanics, this quantization of direction is totally unexpected. On the macroscopic scale, orbital angular momentum, such as that of the moon around the earth, can have any magnitude and be in any direction. Detailed treatment of space quantization began to explain some complexities of atomic spectra, but certain patterns seemed to be caused by something else. As mentioned, spectral lines are actually closely spaced doublets, a characteristic called fine structure, as shown in Figure 30.53. The doublet changes when a magnetic field is applied, implying that whatever causes the doublet interacts with a magnetic field. In 1925, Sem Goudsmit and George Uhlenbeck, two Dutch physicists, successfully argued that electrons have properties analogous to a macroscopic charge spinning on its axis. Electrons, in fact, have an internal or intrinsic angular momentum called intrinsic spin S . Since electrons are charged, their intrinsic spin creates an intrinsic magnetic field. Choices: - suppressed electrical field - magnified rupulsed field - intrinsic electrical field - intrinsic magnetic field A:
intrinsic magnetic field

Q: Cancer of the testes is most common in males between what ages? Read this paragraph and choose the correct option from the provided answers: Another disorder of the testes is cancer . Cancer of the testes is most common in males aged 15 to 35. It occurs when cells in the testes grow out of control. The cells form a lump called a tumor. If found early, cancer of the testes usually can be easily cured with surgery. Choices: - 70 and 90 - 50 and 60 - 10 and 20 - 15 and 35 A:
15 and 35

Q: Q: What is the lowest layer of the atmosphere called? Read this paragraph and choose the correct option from the provided answers: Air movement takes place in the troposphere. This is the lowest layer of the atmosphere. Air moves because of differences in heating. These differences create convection currents and winds ( Figure below ). Choices: - mesosphere - lithosphere - asthenosphere - troposphere A:
A: troposphere

Question: Q: Exothermic reactions in organisms are called what? Read this paragraph and choose the correct option from the provided answers: Exothermic reactions in organisms are called catabolic reactions . These reactions break down molecules into smaller units and release energy. An example of a catabolic reaction is the breakdown of glucose, which releases energy that cells need to carry out life processes. Endothermic reactions in organisms are called anabolic reactions . These reactions build up bigger molecules from smaller ones. An example of an anabolic reaction is the joining of amino acids to form a protein. Which type of reactionscatabolic or anabolicdo you think occur when your body digests food?. Choices: - nuclear reactions - nebular reactions - biogenic reactions - catabolic reactions A:
Answer: catabolic reactions

*Question*
Q: Synostoses unite the sacral vertebrae that fuse together to form the what? Read this paragraph and choose the correct option from the provided answers: synostoses and fusing the bony components together into the single hip bone of the adult. Similarly, synostoses unite the sacral vertebrae that fuse together to form the adult sacrum. Choices: - young sacrum - lower sacrum - permanent sacrum - adult sacrum A:
**Answer**
adult sacrum

*Question*
Q: In alcoholic fermentation , which acid changes to alcohol and carbon dioxide? Read this paragraph and choose the correct option from the provided answers: In alcoholic fermentation , pyruvic acid changes to alcohol and carbon dioxide. This is shown in Figure below . NAD + also forms from NADH, allowing glycolysis to continue making ATP. This type of fermentation is carried out by yeasts and some bacteria. It is used to make bread, wine, and biofuels. Choices: - rain - chloride - lipoic - pyruvic A:
**Answer**
pyruvic