Q: What are the two best known baryons? Read this paragraph and choose the correct option from the provided answers: Particles that are composed of three quarks are called baryons . The two best known baryons are protons and neutrons. A proton is composed of two up quarks and one down quark (uud). The charge on the proton is the result of adding the charges on these quarks . Neutrons are composed of one up quark and two down quarks (udd). The charge on the neutron is the result of adding the charges on these quarks . Choices: - flux and neurons - electrons and neutrons - shafts and neutrons - protons and neutrons A:
protons and neutrons

Q: What kind of electricity can you generate with the energy found in flowing water? Read this paragraph and choose the correct option from the provided answers: The mechanical energy of rapidly flowing water can turn a turbine and generate electricity. Electricity produced in this way is called hydroelectric power. The water may flow over a waterfall or through a dam. You can see a picture of a dam in the Figure below . A drawback of dams is that they flood land upstream from the dam and reduce water flow downstream from the dam, and this can destroy ecosystems. At the following URL, you can learn more about hydroelectric power and see an animation of a hydroelectric power plant. Choices: - wind energy - electrical power - transient power - hydroelectric power A:
hydroelectric power

Q: Dietary proteins are broken down into amino acids during what process? Read this paragraph and choose the correct option from the provided answers: Proteins in the diet are necessary for life. Dietary proteins are broken down into their component amino acids when food is digested. Cells can then use the components to build new proteins. Humans are able to synthesize all but eight of the twenty common amino acids. These eight amino acids, called essential amino acids , must be consumed in foods. Like dietary carbohydrates and lipids, dietary proteins can also be broken down to provide cells with energy. Choices: - accumulation - filtration - photosynthesis - digestion A:
digestion