Q: Inserting an extra plane of atoms into a crystal lattice produces what? Read this paragraph and choose the correct option from the provided answers: Dislocations, Deformations, and Work Hardening Inserting an extra plane of atoms into a crystal lattice produces an edge dislocation. A familiar example of an edge dislocation occurs when an ear of corn contains an extra row of kernels between the other rows (). An edge dislocation in a crystal causes the planes of atoms in the lattice to deform where the extra plane of atoms begins (). The edge dislocation frequently determines whether the entire solid will deform and fail under stress. Deformation occurs when a dislocation moves through a crystal. To illustrate the process, suppose you have a heavy rug that is lying a few inches off-center on a nonskid pad. To move the rug to its proper place, you could pick up one end and pull it. Because of the large area of contact between the rug and the pad, however, they will probably move as a unit. Alternatively, you could pick up the rug and try to set it back down exactly where you want it, but that requires a great deal of effort (and probably at least one extra person). An easier solution is to create a small wrinkle at one end of the rug (an edge dislocation) and gradually push the wrinkle across, resulting in a net movement of the rug as a whole (part (a) in ). Moving the wrinkle requires only a small amount of energy because only a small part of the rug is actually moving at any one time. Similarly, in a solid, the contacts between layers are broken in only one place at a time, which facilitates the deformation process. Saylor URL: http://www. saylor. org/books. Choices: - spot location - spot dislocation - edge location - edge dislocation A:
edge dislocation

Q: What is the term that refers to stored chemical energy in organic matter or wastes? Read this paragraph and choose the correct option from the provided answers: The stored chemical energy in organic matter or wastes is called biomass energy. The organic matter may be trees or other plants, or it may be wastes from homes and industries. When biomass is burned, it produces thermal energy that can be used for heating homes, cooking, or generating electricity. Biomassespecially woodis an important energy source in the poorer nations where most people can't afford fossil fuels. However, burning biomass releases air pollution and contributes to global climate change. Biomass can be used to make ethanol, a fuel that is added to gasoline. Although ethanol releases less pollution than gasoline, large areas of land are needed to grow the plants needed to make it (see Figure below ). This reduces the amount of land available for food production. Choices: - nuclear energy - potential energy - starch energy - biomass energy A:
biomass energy

Q: Q: A catalytic converter filters pollutants in exhaust created by burning what before releasing it into the air? Read this paragraph and choose the correct option from the provided answers: Some of the pollutants from fossil fuels can be filtered out of exhaust before it is released into the air. Other pollutants can be changed to harmless compounds before they are released. Two widely used technologies are scrubbers and catalytic converters. Choices: - carbon dioxide - noble gas - fossil compounds - fossil fuels A:
A: fossil fuels

Question: Q: Spindle fibers pull what apart in anaphase i? Read this paragraph and choose the correct option from the provided answers: In anaphase I, the spindle fibers pull the linked chromosomes apart. The sister chromatids remain tightly bound together at the centromere. It is the chiasma connections that are broken in anaphase I as the fibers attached to the fused kinetochores pull the homologous chromosomes apart (Figure 7.5). In telophase I, the separated chromosomes arrive at opposite poles. The remainder of the typical telophase events may or may not occur depending on the species. In some organisms, the chromosomes decondense and nuclear envelopes form around the chromatids in telophase I. Cytokinesis, the physical separation of the cytoplasmic components into two daughter cells, occurs without reformation of the nuclei in other organisms. In nearly all species, cytokinesis separates the cell contents by either a cleavage furrow (in animals and some fungi), or a cell plate that will ultimately lead to formation of cell walls that separate the two daughter cells (in plants). At each pole, there is just one member of each pair of the homologous chromosomes, so only one full set of the chromosomes is present. This is why the cells are considered haploidthere is only one chromosome set, even though there are duplicate copies of the set because each homolog still consists of two sister chromatids that are still attached to each other. However, although the sister chromatids were once duplicates of the same chromosome, they are no longer identical at this stage because of crossovers. Choices: - known chromosomes - risk chromosomes - True Chromosomes - linked chromosomes A:
Answer: linked chromosomes

*Question*
Q: Segmented worms have a digestive,nervous and what type of system? Read this paragraph and choose the correct option from the provided answers: Segmented worms have a digestive system, nervous system, and circulatory system. Choices: - pulmonary - vascular - lymphatic - circulatory A:
**Answer**
circulatory

Q: Atmospheric pressure can be measured with what tool? Read this paragraph and choose the correct option from the provided answers: Atmospheric pressure can be measured with a barometer. Choices: - thermometer - scale - ruler - barometer A:
barometer