The most effective water heater is a(n)
A. gas water heater.
B. electric water tank.
C. roof-mounted solar hot water heater.
D. oil water heater.
E. propane water heater.
Answer: C
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List the most common biogenic and chemical sedimentary rock types, and describe the depositional environments that favor deposition of each sediment type
What will be an ideal response?
Which of the following best describes desertification?
A) A natural process of succession that cycles from deserts to prairies to forests to deserts B) The formation of dryland ecosystems in regions where temperatures have increased C) The natural movement of deserts advancing into new regions due to shifts in wind direction D) Often the result of topsoil erosion leading to a permanent reduction in productivity
Which of the following intermolecular forces best describes why nonpolar molecules like gasoline (C8H18) have only limited solubility in water?
A. dipole-dipole B. induced dipole-induced dipole C. dipole-induced dipole D. ion-dipole E. Both A and B
How is a pothole formed?
A. Through deposition of sand on the inside curve of a meander B. By the saltation of individual sand grains on a muddy stream bed C. Because of the chemical weathering of rocky banks by acidic river water D. Through the swirling, scouring action of pebbles on a hard stream bed E. Through erosion of a muddy bank on the outside curve of a meander