*Question*
Answer the following question given this paragraph: Oxygen is made by trees and other plants during photosynthesis. We know that we need oxygen to live. But why? This oxygen is an essential component for the optimal production of usable energy - which occurs through cellular respiration. Q: What is made by trees and other plants during photosynthesis? Choices: - methane - carbon dioxide - nitrogen - oxygen A:
**Answer**
oxygen

*Question*
Answer the following question given this paragraph: Waves may be transverse, longitudinal, or a combination of the two. (Water waves are actually a combination of transverse and longitudinal. The simplified water wave illustrated in Figure 16.30 shows no longitudinal motion of the bird. ) The waves on the strings of musical instruments are transverseso are electromagnetic waves, such as visible light. Sound waves in air and water are longitudinal. Their disturbances are periodic variations in pressure that are transmitted in fluids. Fluids do not have appreciable shear strength, and thus the sound waves in them must be longitudinal or compressional. Sound in solids can be both longitudinal and transverse. Q: The waves on the strings of musical instruments are transverseso are electromagnetic waves, such as visible light. sound waves in air and water are this? Choices: - symmetrical - hydroelectric - horizontal - longitudinal A:
**Answer**
longitudinal

*Question*
Answer the following question given this paragraph: Compressibility is the measure of how much a given volume of matter decreases when placed under pressure. If we put pressure on a solid or a liquid, there is essentially no change in volume. The atoms, ions, or molecules that make up the solid or liquid are very close together. There is no space between the individual particles, so they cannot pack together. Q: The measure of how much a given volume of matter decreases when placed under pressure is called? Choices: - elasticity - solubility - malleability - compressibility A:
**Answer**
compressibility

*Question*
Answer the following question given this paragraph: The three smallest alkanes are methane, ethane, and propane. Some hydrocarbons have one or more carboncarbon double bonds (denoted C=C). These hydrocarbons are called alkenes. http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gobch04_s06_f02shows the formulas and the molecular models of the two simplest alkenes. Note that the names of alkenes have the same stem as the alkane with the same number of carbon atoms in its chain but have the ending -ene. Thus, ethene is an alkene with two carbon atoms per molecule, and propene is a compound with three carbon atoms and one double bond. Figure 4.7 Formulas and Molecular Models of the Two Simplest Alkenes. Q: Methane, ethane, and propane are three of the smallest what? Choices: - organisms - atoms - microorganisms - alkanes A:
**Answer**
alkanes