Lightning that seems to occur without thunder is called
A) heat lightning.
B) silent lightning.
C) sheet lightning.
D) northern lightning.
Answer: A
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The molecules of a gas at room temperature move at about
A. 1 km/hr. 0.27 m/s. B. 500 m/s. C. 150 km/hr. 40.5 m/s. D. 10 km/hr. 2.7 m/s.
The Ogallala Aquifer is a source of
A) salt water. B) minerals. C) freshwater. D) magma.
What is metamorphism?
What will be an ideal response?
It has been suggested that the threat of global warming can be addressed by geoengineering strategies. Which strategy has not been examined by researchers?
A. adding iron to the oceans B. building lots of chemical plants to remove ocean acidity C. injecting sulfate particulates into the stratosphere D. covering the oceans with Styrofoam chips E. placing giant mirrors in orbit above the earth to reflect sunlight