Answer the following question given this paragraph: Arteries are muscular blood vessels that carry blood away from the heart. They have thick walls that can withstand the pressure of blood pumped by the heart. Arteries generally carry oxygen-rich blood. The largest artery is the aorta, which receives blood directly from the heart. It branches to form smaller and smaller arteries throughout the body. The smallest arteries are called arterioles. Q: What is the name of muscular blood vessels that carry blood away from the heart? Choices: - tubes - Veins - Aorta - arteries A:
arteries
(Question)
Answer the following question given this paragraph: Ferns are the most common seedless vascular plants ( Figure below ). They usually have large divided leaves called fronds. In most ferns, fronds develop from a curled-up formation called a fiddlehead ( Figure below ). The fiddlehead looks like the curled decoration on the end of a stringed instrument, such as a fiddle. Leaves unroll as the fiddleheads grow and expand. Ferns grow in a variety of habitats, ranging in size from tiny aquatic species to giant tropical plants. Q: What are the most common seedless vascular plants? Choices: - trees - grasses - weeds - ferns A:
(Answer)
ferns
Ques: Answer the following question given this paragraph: When you add sugar to a cold drink, you may stir it to help the sugar dissolve. If you don't stir, the sugar may eventually dissolve, but it will take much longer. Stirring is one of several factors that affect how fast a solute dissolves in a solvent. Temperature is another factor. A solid solute dissolves faster at a higher temperature. For example, sugar dissolves faster in hot tea than in ice tea. A third factor that affects the rate of dissolving is the surface area of the solute. For example, if you put granulated sugar in a glass of ice tea, it will dissolve more quickly than the same amount of sugar in a cube. That's because granulated sugar has much more surface area than a cube of sugar. You can see videos of all three factors at these URLs:. Q: Stirring, surface area, and temperature affect the rate at which what occurs? Choices: - concentration dissolves - solute freezes - solute fragments - solute dissolves A:
Ans: solute dissolves
(Q).
Answer the following question given this paragraph: Two chemical species combine to produce a new compound. The general expression for this reaction is A + B C. Q: What are the largest phylum of the animal kingdom? Choices: - Crustacea - Chelicerata - Pycnogonida - arthropods A:
(A).
arthropods
Ques:Answer the following question given this paragraph: Making Connections: Absolute Zero What is absolute zero? Absolute zero is the temperature at which all molecular motion has ceased. The concept of absolute zero arises from the behavior of gases. Figure 13.9 shows how the pressure of gases at a constant volume decreases as temperature decreases. Various scientists have noted that the pressures of gases extrapolate to zero at the same temperature, 273.15C . This extrapolation implies that there is a lowest temperature. This temperature is called absolute zero. Today we know that most gases first liquefy and then freeze, and it is not actually possible to reach absolute zero. The numerical value of absolute zero temperature is 273.15C or 0 K. Q: The temperature at which all molecular motion has ceased is called what? Choices: - 0 degrees kelvin - stopping point - 0 degrees celcius - absolute zero A:

Ans:absolute zero
Ques: Answer the following question given this paragraph: Particles with opposite electric charges attract each other. This explains why negative electrons orbit the positive nucleus. Particles with the same electric charge repel each other. This means that the positive protons in the nucleus push apart from one another. So why doesn't the nucleus fly apart? An even stronger forcecalled the strong nuclear forceholds protons and neutrons together in the nucleus. You can learn more about these forces in the nucleus by watching the video at this URL:. Q: Particles with what type of electric charges attract each other? Choices: - similar - same - simple - opposite A:
Ans:
opposite