Q: Electric generators convert what type of energy to electric energy? Read this paragraph and choose the correct option from the provided answers: Electric generators convert mechanical energy to electric energy. The generator consists of some number of wire loops wrapped around an iron core and placed in a strong magnetic field. The loops of wire and the iron core are called the armature . The armature is mounted so that it can rotate freely inside the magnetic field. Mechanical energy is used to spin the armature in the field so that the wire loops cut across the field and produce electric current. The of this current is calculated by . Choices: - electromagnetic energy - thermodynamic energy - fluid energy - mechanical energy A:
mechanical energy

Q: Is an acid lower or higher than 7 on the ph scale? Read this paragraph and choose the correct option from the provided answers: A: The weakest acid on the scale is milk, which has a pH value between 6.5 and 6.8. The strongest base on the scale is liquid drain cleaner, which has a pH of 14. Choices: - exactly 7 - higher than 7 - twice as much as 7 - lower than 7 A:
lower than 7

Q: Q: What are temporary feet that protists have called? Read this paragraph and choose the correct option from the provided answers: Other protists have what are called transient pseudopodia , which are like temporary feet. The cell surface extends out to form feet-like structures that propel the cell forward. An example of a protist with pseudopodia is the amoeba. Choices: - pedicules - spontaneous pseudopodia - temporary flagella - transient pseudopodia A:
A: transient pseudopodia

Question: Q: What is the process of larva becoming an adult called? Read this paragraph and choose the correct option from the provided answers: After hatching, most arthropods go through one or more larval stages before reaching adulthood. The larvae may look very different from the adults. They change into the adult form in a process called metamorphosis. During metamorphosis, the arthropod is called a pupa. It may or may not spend this stage inside a special container called a cocoon. A familiar example of arthropod metamorphosis is the transformation of a caterpillar (larva) into a butterfly (adult) (see Figure below ). Distinctive life stages and metamorphosis are highly adaptive. They allow functions to be divided among different life stages. Each life stage can evolve adaptations to suit it for its specific functions without affecting the adaptations of the other stages. Choices: - parthenogenesis - synthesis - evolution - metamorphosis A:
Answer: metamorphosis

*Question*
Q: The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil? Read this paragraph and choose the correct option from the provided answers: The stability of an ecosystem depends on the actions of the decomposers. Examples of decomposers include mushrooms on a decaying log. Bacteria in the soil are also decomposers. Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients. The carbon and nitrogen necessary to build organic compounds, and then cells, allowing an organism to grow, would be insufficient. Other nutrients necessary for an organism to function properly would also not be sufficient. Essentially, many organisms could not exist. Choices: - whitefly - fluxes - aphids - decomposers A:
**Answer**
decomposers

Q: How long can carbon be stored in sedimentary rock? Read this paragraph and choose the correct option from the provided answers: Carbon cycles quickly between organisms and the atmosphere. Cellular respiration releases carbon into the atmosphere as carbon dioxide. Carbon is also released when organisms decompose. Human actions, such as the burning of fossil fuels, also release carbon into the atmosphere. Natural processes, such as volcanic eruptions, release carbon from magma into the atmosphere. Warm ocean waters also release carbon, whereas cold ocean water dissolves carbon from the atmosphere. Photosynthesis (autotrophs) removes carbon dioxide from the atmosphere and uses it to make organic compounds. Carbon cycles far more slowly through geological processes such as sedimentation. Runoff, rivers and streams dissolve carbon in rocks and carry it to the ocean. Sediments from dead organisms may form fossil fuels or carbon-containing rocks. Carbon may be stored in sedimentary rock for millions of years. Choices: - around 10,000 years - less than 1000 years - 22 weeks - millions of years A:
millions of years