Answer the following question given this paragraph: Particles of gases are farther apart and have fewer collisions, so they are not good at transferring thermal energy. Materials that are poor thermal conductors are called thermal insulators . Figure below shows several examples. Fluffy yellow insulation inside the roof of a home is full of air. The air prevents the transfer of thermal energy into the house on hot days and out of the house on cold days. A puffy down jacket keeps you warm in the winter for the same reason. Its feather filling holds trapped air that prevents energy transfer from your warm body to the cold air outside. Solids like plastic and wood are also good thermal insulators. That's why pot handles and cooking utensils are often made of these materials. Q: What are materials that are poor thermal conductors called? Choices: - pollution insulators - sunlight insulators - warmth insulators - thermal insulators A:
thermal insulators
Answer the following question given this paragraph: Food chains carry energy from producers (autotrophs) to consumers (heterotrophs). 99% of energy for life comes from the sun via photosynthesis. Note that only nutrients recycle. Energy must continue to flow into the system. Though this food chains "ends" with decomposers, do decomposers, in fact, digest matter from each level of the food chain? (See the Energy Transfer: Decomposers (Advanced) concept). Q: Food chains carry energy from what group to what group? Choices: - consumers to producers - decomposers to producers - refiners to consumers - producers to consumers A:
producers to consumers
Q: Answer the following question given this paragraph: The stomach is a sac-like organ at the end of the esophagus. It has thick muscular walls. The muscles contract and relax. This moves the food around and helps break it into smaller pieces. Mixing the food around with the enzyme pepsin and other chemicals helps digest proteins. Q: What is the sac-like organ at the end of the esophagus? Choices: - rectum - larynx - appendix - stomach A:
A: stomach
Question: Answer the following question given this paragraph: Virtually all living things use glucose for energy, but glucose is just one of many examples of biochemical compounds that are found in most or all living things. In fact the similarity in biochemical compounds between living things provides some of the best evidence for the evolution of species from common ancestors. A classic example is the biochemical compound called cytochrome c. It is found in all living organisms because it performs essential life functions. Only slight variations in the molecule exist between closely related species, as you can see in the Figure below . The molecule is identical in humans and their closest relatives, the chimpanzees. And even between humans and the single-celled tetrahymena (pictured in the Figure below ), the cytochrome c molecule is nearly 50 percent the same. Q: Similarity in biochemicals, like the glucose used by virtually all living things for energy, provides evidence of what? Choices: - gravity - variation - DNA - evolution A:
Answer: evolution
*Question*
Answer the following question given this paragraph: Sexual reproduction involves two parents. It produces offspring that are all genetically unique. It requires the production of haploid gametes. The union of gametes is called fertilization. It results in a diploid zygote. Q: The union of gametes is called? Choices: - pollination - migration - fusion - fertilization A:
**Answer**
fertilization
(Q).
Answer the following question given this paragraph: A solute generally lowers the freezing point of a solvent, which is called freezing point depression. For example, spreading salt on an icy road melts the ice. Q: A solute generally does what to the freezing point of a solvent? Choices: - regulates it - raises it - increases it - lowers it A:
(A).
lowers it