Q: Answer the following question given this paragraph: A: Air in the atmosphere is a gaseous solution. It is a mixture that contains mainly nitrogen and oxygen gases, with very small amounts of several other gases. The circle graph in the Figure below shows the composition of air. Because air is a solution, it is homogeneous. In other words, no matter where you go, the air always contains the same proportion of gases that are shown in the graph. Q: Which two gases make up the bulk of earth's atmosphere? Choices: - carbon and oxygen - phosphorus and oxygen - nitrogen and argon - nitrogen and oxygen A:
A: nitrogen and oxygen

Q: Answer the following question given this paragraph: The wavelength of a transverse wave can be measured as the distance between two adjacent crests. The wavelength of a longitudinal wave can be measured as the distance between two adjacent compressions. Q: The wavelength of a what type of wave can be measured as the distance between two adjacent compressions? Choices: - horizontal - lateral - vertical - longitudinal A:
A: longitudinal

Q: Answer the following question given this paragraph: Note the Pattern Ionic compounds contain both cations and anions in a ratio that results in zero electrical charge. In covalent compounds, electrons are shared between bonded atoms and are simultaneously attracted to more than one nucleus. In contrast, ionic compounds contain cations and anions rather than discrete neutral molecules. Ionic compounds are held together by the attractive electrostatic interactions between cations and anions. In an ionic compound, the cations and anions are arranged in space to form an extended three-dimensional array that maximizes the number of attractive electrostatic interactions and minimizes the number of repulsive electrostatic interactions (Figure 2.5 "Covalent and Ionic Bonding"). As shown in Equation 2.1, the electrostatic energy of the interaction between two charged particles is proportional to the product of the charges on the particles and inversely proportional to the distance between them: Saylor URL: http://www. saylor. org/books. Q: Ionic compounds contain cations and anions rather than what? Choices: - characterized neutral molecules - positive molecules - analogous neutral molecules - discrete neutral molecules A:
A: discrete neutral molecules

Q: Answer the following question given this paragraph: Most air masses form over polar or tropical regions. They may form over continents or oceans. Air masses are moist if they form over oceans. They are dry if they form over continents. Air masses that form over oceans are called maritime air masses. Those that form over continents are called continental air masses. The image below shows air masses that form over or near North America ( Figure below ). Q: If an air mass forms over an ocean it is called what type of air mass? Choices: - cumulus - hurricane - tropical - maritime A:
A: maritime