A classification scheme that grouped plutonic and metamorphic rocks together and sedimentary and volcanic rocks together would be based on
A) the average grain size of the rocks.
B) the presence of glass in the rocks.
C) the location of the rock's formation.
D) the bulk composition of the rocks.
Answer: C
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Indicate whether this statement is true or false.
A mass of falling and tumbling rock, debris, and soil leveling at a high velocity owing to the presence of ice or water is a
A) debris avalanche. B) creep. C) rockfall. D) landslide. E) mudflow.
Which of the following statements comparing covalent and hydrogen bonding is correct?
A) Stronger covalent bonds occur between adjacent water molecules and weaker hydrogen bonds form within water molecules. B) Stronger covalent bonds occur within water molecules and weaker hydrogen bonds form between adjacent water molecules. C) Weaker covalent bonds occur between adjacent water molecules and stronger hydrogen bonds form within water molecules. D) Weaker covalent bonds occur within water molecules and stronger hydrogen bonds form between adjacent water molecules.
Today, it takes about ______ Calories of energy to produce about 1 Calorie of food.
a. 2 b. 20 c. 55 d. 90 e. 125