Why do scientists think we've entered the anthropocene, a new geological interval?
What will be an ideal response?
Permanent evidence (such as radioactive fallouts) of human activities are accumulating in the Earth
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Overall, nonrenewable resources have a lower net energy than renewable resources.
Answer the following statement true (T) or false (F)
How is ozone produced in the upper atmosphere?
A. It diffuses from the lower atmosphere. B. It forms by reaction of oxygen molecules with UV light. C. It forms by nuclear decomposition of oxygen. D. It forms by the reaction of nitric dioxide and oxygen. E. all of the above
Which of the following changes to the sun's total energy output will likely occur as the number of sunspots increases?
A. slight decrease B. no change C. alternately increase and decrease above average values D. slight increase
What are examples of provisioning ecosystem services?
A) food, water, and fiber B) soil formation and nutrient cycles C) climate, water flow, and disease D) pollination and chlorophyll E) aesthetic beauty and recreation