Brainiacs

SCI 200--Final Milestone Unit 4 Questions and Answers Already Passed Which of the following describes a natural source of air pollution? During their vacation, Jim and his family drove their car through several national parks. Diesel exhaust from idling school buses is a concern for some parents. Oil refineries on the Gulf Coast release benzene and other volatile organic compounds into the atmosphere. A dust storm in 1983 dumped 1,000 pounds of topsoil onto the city of Melbourne, Australi...

SCI 200--Unit 4 Challenge 1 Questions and Answers 100% Solved Big agriculture turns the land into fields by cutting down trees and running the animals out. Deforestation and habitat fragmentation can lead directly to __________. a.) a decrease in agricultural production b.) an increase in endangered species c.) a decrease in the human population d.) an increase in biodiversity b.) an increase in endangered species Urban development is connected to several environmental issues includ...

SCI 200--Unit 1-Challenge 1 Questions and Answers 100% Correct Alexander Fleming made a great discovery in the 1920s. While cleaning some glass plates upon which he had been growing bacteria, he noticed one plate had grown mold and the bacteria was gone.Which of the following activities corresponds with the conclusion step of the scientific method? Fleming hypothesizes that if bacteria are exposed to a certain kind of mold, the bacteria will die. b.) Fleming wonders if there is a causal ...

SCI 200--Practice Milestone 3 Questions and Answers (Solved) Select the true statement about water usage. Households, industry, and agriculture use roughly the same amount of water. Agriculture uses the least water. Industry uses the most water. Households use the least water. Households use the least water. In the United States, which of the following is the percentage of grain grown that is used for animal feed? 100% 75% 50% 90% 90% Which of the following correctly lists the three...

SCI 200--Final Milestone 2 Questions and Answers Already Passed Choose the statement about nitrogen and nitrogen fixation that is FALSE. The roots of certain plants contain microorganisms that absorb nitrogen from the atmosphere and pass it on to animals. When an animal dies, microorganisms convert the nitrogen in its proteins and muscles into a form that plants can eat. Nitrogen makes up about 22% of the atmosphere and is an important biological compound found in DNA. Nitrogen in the a...

SCI 200--Practice Milestone 2 Questions and Answers 100% Correct Which characteristic is representative of an exponential population growth model? Produces an S-shaped curve Shows the effect of limiting factors Reflects a population's carrying capacity Reflects growth in an ideal situation Reflects growth in an ideal situation Which statement prizes species for their intrinsic value, rather than for their ecosystem services? Bees are valuable because they pollinate many foods that human...

SCI 200--Unit 3 Challenge 2 Questions and Answers Already Graded A+ Choose the true statement about water on Earth. Oceans cover about 70% of the Earth's surface. Which of the following statements about groundwater is NOT true? Roads built by humans enable water to soak into the earth. Which of the following is a reason why dams are built? To generate power Which of the following is a benefit of dams? Reliable water supply Which of the following is an argument for the removal of dams? W...

SCI 200--Unit 3 Challenge 1 Latest Graded A+ The standard of living in the United States requires five hectares per person, which is equivalent to a little more than __________. a.) five football fields b.) nine football fields c.) three football fields d.) seven football fields b.) nine football fields n the United States, the standard of living requires about five hectares per person. If every person on Earth required five hectares to live, we would need __________ to sustain th...

SCI 200 Final Milestone Unit 1 Latest Already Passed Which statement is true about human population growth? The population was 200 million people for most of history. In 1800, there were one billion people on Earth. The human population doubled between the years 1900 and 1950. World population has experienced continuous growth since 8000 BC. In 1800, there were one billion people on Earth. Select the item below that is abiotic. Fungi Rainfall Trees Algae Rainfall "Threats of an ep...

SCI 200- Unit 2 Challenge 2 Questions and Answers 100% Pass Which of the following is an emergent property at the ecosystem level of organization? a.) The types of ecosystems b.) The differences between organisms within a species c.) The interactions between communities d.) The relative abundance of species SUBMIT MY ANSWER c.) The interactions between communities Which of the following is an emergent property at the population level of organization? a.) The geographical distribut...