Answer the following question given this paragraph: Some modern seed plants are gymnosperms that produce seeds in cones. Q: What term is used to describe modern seed plants that produce seeds in cones? Choices: - angiosperms - deciduous - perennials - gymnosperms A:
gymnosperms
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Answer the following question given this paragraph: Insects eat in many different ways and they eat a huge range of foods. Around half are plant-eaters, feeding on leaves, roots, seeds, nectar, or wood. Aphids and leafhoppers suck up the sap from plants. Praying mantises are predators, hunting other small creatures, including insects like moths, caterpillars, flies, beetles, and spiders. Insects like mosquitoes and aphids have special mouthparts that help them pierce and suck. Others, like assassin bugs ( Figure below ) and certain species of female mosquitoes, eat other insects. Fleas and lice are parasites, eating the flesh or blood of larger animals without killing them. Q: What are the insects that suck up the sap from plants? Choices: - plagues and leafhoppers - butterflies and leafhoppers - roaches and leafhoppers - aphids and leafhoppers A:
aphids and leafhoppers
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Answer the following question given this paragraph: Problem-Solving Strategies for the Effects of Heat Transfer 1. Examine the situation to determine that there is a change in the temperature or phase. Is there heat transfer into or out of the system? When the presence or absence of a phase change is not obvious, you may wish to first solve the problem as if there were no phase changes, and examine the temperature change obtained. If it is sufficient to take you past a boiling or melting point, you should then go back and do the problem in stepstemperature change, phase change, subsequent temperature change, and so on. Identify and list all objects that change temperature and phase. Identify exactly what needs to be determined in the problem (identify the unknowns). A written list is useful. Make a list of what is given or what can be inferred from the problem as stated (identify the knowns). Solve the appropriate equation for the quantity to be determined (the unknown). If there is a temperature change, the transferred heat depends on the specific heat (see Table 14.1) whereas, for a phase change, the transferred heat depends on the latent heat. See Table 14.2. Substitute the knowns along with their units into the appropriate equation and obtain numerical solutions complete with units. You will need to do this in steps if there is more than one stage to the process (such as a temperature change followed by a phase change). Check the answer to see if it is reasonable: Does it make sense? As an example, be certain that the temperature change does not also cause a phase change that you have not taken into account. Q: What is the term of a phase change if solid water has it's average kinetic energy increased to change it to liquid water? Choices: - boiling - freezing - evaporation - melting A:
melting
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Answer the following question given this paragraph: Molecular and Formula Masses The molecular mass of a substance is the sum of the average masses of the atoms in one molecule of a substance. It is calculated by adding together the atomic masses of the elements in the substance, each multiplied by its subscript (written or implied) in the molecular formula. Because the units of atomic mass are atomic mass units, the units of molecular mass are also atomic mass units. The procedure for calculating molecular masses is illustrated in Example 1. Q: What is calculated by adding together the atomic masses of the elements in the substance, each multiplied by its subscript (written or implied) in the molecular formula? Choices: - mass effect - fractional mass - magnetic mass - molecular mass A:
molecular mass
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