A 1-kg ball dropped vertically 2 m rebounds 1.5 m after bouncing from the ground. The amount of energy converted to heat is about
A. more than 2.0 J.
B. 1.5 J.
C. 1.0 J.
D. 2.0 J.
Answer: A
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The sea cave in this photograph formed by
A) erosion of a promontory by waves.
B) erosion by blowing beach sand.
C) removal of rocks by giant lobsters.
D) a rapid drop in sea level.
Which of the following best matches the description?Early stages of succession that begin the soil-building process.
A. grassland B. benthic C. tundra D. euphotic E. desert F. marsh G. periphyton H. littoral zone I. pelagic J. pioneer community K. deciduous forest L. phytoplankton M. biochemical oxygen demand N. boreal forest O. savanna
A mineral's hardness is dependent on the
A) strength of its chemical bonds. B) strength of its ionization. C) size of its atoms; large atoms are harder than small atoms. D) geometric arrangement of atoms; sheet structured tetrahedra are harder than chained tetrahedra.
Which of these actions can we take to reduce desertification?
A. increase irrigation B. increase grazing C. manipulate weather to control drought D. decrease number of trees in desertified areas E. decrease human contribution to climate change