Ques:Answer the following question given this paragraph: Gas Laws and Air Composition Gas molecules exert force on the surfaces with which they are in contact; this force is called pressure. In natural systems, gases are normally present as a mixture of different types of molecules. For example, the atmosphere consists of oxygen, nitrogen, carbon dioxide, and other gaseous molecules, and this gaseous mixture exerts a certain pressure referred to as atmospheric pressure (Table 22.2). Partial pressure (Px) is the pressure of a single type of gas in a mixture of gases. For example, in the atmosphere, oxygen exerts a partial pressure, and nitrogen exerts another partial pressure, independent of the partial pressure of oxygen (Figure 22.21). Total pressure is the sum of all the partial pressures of a gaseous mixture. Dalton's law describes the behavior of nonreactive gases in a gaseous mixture and states that a specific gas type in a mixture exerts its own pressure; thus, the total pressure exerted by a mixture of gases is the sum of the partial pressures of the gases in the mixture. Q: The atmosphere consists of oxygen, nitrogen, carbon dioxide, which exerts a certain pressure referred to as what? Choices: - gravity pressure - tidal pressure - nitrogen pressure - atmospheric pressure A:

Ans:atmospheric pressure
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Ques:Answer the following question given this paragraph: 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. Q: Most plates are made up of a combination of what? Choices: - oceanic and reflective lithosphere - continental and battered lithosphere - continental and reflective lithosphere - continental and oceanic lithosphere A:

Ans:continental and oceanic lithosphere
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Ques:Answer the following question given this paragraph: You're probably less familiar with plasmas than with solids, liquids, and gases. Yet, most of the universe consists of plasma. Plasma is a state of matter that resembles a gas but has certain properties that a gas does not have. Like a gas, plasma lacks a fixed volume and shape. Unlike a gas, plasma can conduct electricity and respond to magnetism. That's because plasma contains charged particles called ions. This gives plasma other interesting properties. For example, it glows with light. Q: What is the state of matter that resembles a gas but has certain properties that a gas does not have called? Choices: - liquid - fluid - solid - plasma A:

Ans:plasma
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Ques:Answer the following question given this paragraph: We are lucky to have an atmosphere on Earth. The atmosphere supports life, and is also needed for the water cycle and weather. The gases of the atmosphere even allow us to hear. Q: What supports life, and is also needed for the water cycle and weather? Choices: - fossil fuels - oxygen - greenhouse gas - atmosphere A:

Ans:
atmosphere
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