Scientists figured out that the outer core must be liquid because S waves do not pass through it, but P waves do. The behavior of P and S waves also indicates that the inner core is solid. The speed of seismic waves also depends on the density of the material through which they are traveling.
A. All are true except for A because there is a certain pattern to all polymers
<span>"Because they do not generally affect the taste, smell, or appearance of a food, one cannot tell that a pathogen is present. Spoilage bacteria can grow at cold temperatures, such as in the refrigerator. Eventually they cause food to develop off or bad tastes and smells."
- askkaren.com
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Human ecosystems limit the the growth of other ecosystems due to the pursuit of technology and our own growth.
