9. define and give an example of a system? distinguish among the input flow (throughput), and output of a system wny
are scientific models useful? what is feedback? what is a feedback loop? distinguish between a positive feedback loop
and a negative corrective) feedback loop in a system, and give an example of each. distinguish between a time delay
and a synergistic interaction (synergy) in a system and give an example of each. what is a tipping point?

Briefly explain how one development from the period 1861 to 1865 not directly mentioned un the excerpts supports mcpherson's argument

Which statements describe continental crust? select the three correct answers. a-it is formed in all parts of the continents. b-it is made mostly of volcanic rock. c-it is destroyed by melting near the top of the mantle. d-it is less than 10 km thick. e-its ages ranges from very young to more than 4 billion years old.

What is the american psychological association’s ethical principle of psychologists and code of conduct based upon? a. the work of a dozen world-renowned philosophers and ethical savants. b. the feedback of thousands of psychologists and their ethical struggles. c. the regulatory power and authority of the united states constitution. d. the hippocratic rules and guidelines of medical practitioners and surgeons. select the best answer from the choices provided a b c