What type of feedback maintains stability in a system; i.e., what type of feedback keeps a system functioning properly?

A) Neutral B) Negative C) Positive


B

Environmental & Atmospheric Sciences

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When water enters a crack in a rock and subsequently freezes, it has the effect of ___

a) gluing the rock more tightly together b) making the rock harder c) sealing the crack thereby preventing further weathering d) widening the crack and hastening the rock's disintegration e) displacing surface acids that may weaken the rock

Environmental & Atmospheric Sciences

What type of mineral is neither an energy resource nor a metallic resource, but still has commercial value?

a. construction mineral b. economic mineral c. silicate mineral d. industrial mineral e. rare earth mineral

Environmental & Atmospheric Sciences

Planets exist outside of our solar system.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Upon which is the force of gravity greater?

A. A 1-kg iron ball. B. A 1-kg block of wood. C. A 1-kg sack of feathers. D. all of the above

Environmental & Atmospheric Sciences