Q: In an experiment, what is kept constant so they will not affect the results, including affecting the dependent variable? Read this paragraph and choose the correct option from the provided answers: Experimental controls are other factors that might affect the dependent variable. They are kept constant so they will not affect the results of the experiment. Choices: - atmospheric controls - similar controls - educated controls - experimental controls A:
experimental controls
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Q: Most plates are made up of a combination of what? Read this paragraph and choose the correct option from the provided answers: If you look at the map pictured below, you will see that the lithosphere is divided into plates ( Figure below ). There are a dozen major and several minor plates. Each plate is named for the continent or ocean basin it contains. Some plates are made of all oceanic lithosphere. A few are all continental lithosphere. But most plates are made of a combination of both. Notice the locations where the most earthquake epicenters are found. Choices: - oceanic and reflective lithosphere - continental and battered lithosphere - continental and reflective lithosphere - continental and oceanic lithosphere A:
continental and oceanic lithosphere
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Q: The brain and spinal cord are part of what system, which serves as a control center? Read this paragraph and choose the correct option from the provided answers: The central nervous includes the brain and spinal cord. The brain is the control center of the nervous system. It controls virtually all mental and physical processes. The spinal cord is a long, thin bundle of nervous tissue that passes messages from the body to the brain and from the brain to the body. Choices: - primary nervous system - active nervous system - large nervous system - central nervous system A:
central nervous system
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Q: What changes encoded waves which are being broadcast into sounds? Read this paragraph and choose the correct option from the provided answers: In radio broadcasts, sounds are encoded in radio waves by changing either the amplitude (AM) or frequency (FM) of the waves. The encoded waves are broadcast from a tower and changed back to sounds by radio receivers. Choices: - transmitters - amplifiers - band receivers - radio receivers A:
radio receivers
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