Soil Science

You fill a 5 gallon pail with backyard soil. Assuming a bulk density of 1.3 g/cm^3, what is the total soil weight?

Carbon dioxide in the atmosphere traps heat and warms the air, just as clear glass does in the greenhouse.

Carbon dioxide in the atmosphere traps heat and warms the air, just as clear glass does in the greenhouse. Scientific evidence indicates that the carbon dioxide added to the air by the burning of wood and fossil fuels is contributing to the rise in global temperature. Tropical rain forests are estimated to be responsible for more than 20% of global photosynthesis. It seems resonable to expect that the rain forests would reduce global warming by consuming large amounts of carbon dioxide, but many experts now think that rain forests make little or no net contribution to reduction of global warming. Why might this be? Hint What happens to the food produced by a rain forest tree eaten by animals... click for more

Enzyme and Endocrine Disruptor Clarifications

Which of these apply to Enzymes A. The majority of chemical reactions in our bodies do not require enzymes. B. Enzymes are functional proteins C. Enzymes get used up as part of a reaction D. Cyto chrome P-450 is an example of an enzyme that helps to oxidize chemicals in the body. E. Biotransformation of toxins could not occur without enzymes Which of these statements apply to endocrine disruptors A. They are toxins that disrupt a hormone or enzyme in the human body B. They are exogenous substance which causes adverse effects in an organism subsequent to changes in the endocrine system C. They disrupt the nervous system D. An example of an endocrine disruptor is one that mi... click for more

Death from cancer

A Radiology Tech, died of cancer believed to be caused by many years of exposure to radiation. Death due to Cancer is seen to be at much higher risks for certain occupations. Could the cancer been caused by some other agent/s? Being specific in your own words

Describe the Industrial Revolution. How has it impacted the environment and the way that humans use natural resources?

Unit 1 Individual Project Deliverable Length: 2-3 pages Details: Answer the following questions in a 2-3-page essay using authoritative references. Describe the Industrial Revolution. How has it impacted the environment and the way that humans use natural resources? What triggered the Environmental Revolution? When did people become more focused on environmental issues? What are the goals of the Environmental Movement? Do you think that we should continue to pursue these goals? Why or why not? Biogeochemical cycles describe the cycling and recycling of elements in ecosystems. In your own words, describe the cycling of carbon, phosphorus, and nitrogen through both the living (bioti... click for more