Ques: Answer the following question given this paragraph: The color of soil indicates its fertility. Black or dark brown soils are rich in nitrogen and contain a high percentage of organic materials. Soils that are nitrogen poor and low in organic material might be gray, yellow, or red. Q: What visual property of soil indicates fertility and nitrogen content? Choices: - texture - contrast - quality - color A:
Ans: color

Ques: Answer the following question given this paragraph: A trophic level is a feeding position in a food chain or food web. Most food chains and webs have a maximum of four trophic levels. There is less energy and biomass at higher trophic levels. Q: Most food chains and webs have a maximum of how many trophic levels? Choices: - 3 - 10 - 6 - 4 A:
Ans: 4

Ques: Answer the following question given this paragraph: 1.8 End-of-Chapter Material Chapter Summary To ensure that you understand the material in this chapter, you should review the meanings of the bold terms in the following summary and ask yourself how they relate to the topics in the chapter. Chemistry is the study of matter, which is anything that has mass and takes up space. Chemistry is one branch of science, which is the study of the natural universe. Like all branches of science, chemistry relies on the scientific method, which is a process of Saylor URL: http://www. saylor. org/books. Q: What branch of science is defined as the study of matter? Choices: - astrophysics - geology - biology - chemistry A:
Ans: chemistry

Ques: Answer the following question given this paragraph: For machines that increase force including ramps, doorknobs, and nutcrackers the output force is greater than the input force. Therefore, the mechanical advantage is greater than 1. Q: In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force? Choices: - drop is greater - output is smaller - input is greater - output is greater A:
Ans:
output is greater