A mineral's hardness depends on the strength of its chemical bonds. Name and describe the factors that influence hardness
What will be an ideal response?
Factors that influence bond strength influence mineral hardness. Ionic charge: the greater the charge, the greater the attraction between ions and hence, the stronger the bond. Ion size: the smaller the ion/atom, the smaller the distance between ions, thus a greater attraction and stronger bond. Ion packing: closely packed ions with their small distance between one another have stronger attractions and stronger bonds. Stronger bonds yield harder minerals.
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Identify three major economical and three major ecological benefits of forest ecosystems.
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Sea otters play a role in maintaining the biodiversity of which ecosystem?
a. Tidepools b. coastal kelp forests c. coastal sandy beaches d. open ocean areas e. Estuaries
Northeasters (or nor’easters) are midlatitude storms commonly found:a
along the Pacific coast of North America. b. along the Atlantic coast of North America. c. along the Gulf coast of North America. d. both a and b
Dolphins and porpoises emit sounds from their ________
A) blowhole B) junk C) melon D) museau du singe E) nostril