A sedimentary rock that shows evidence of contact metamorphism must be ____________________
in age than the igneous rock with which it is in contact, even if it lies above the igneous rock. Fill in the blank(s) with the appropriate word(s).
older
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The term "mackerel sky" describes which of the following types of cloud?
A. stratocumulus B. cirrocumulus C. cumulonimbus D. nimbostratus
What type of eruption formed the volcano in this photograph?
A) Fluid lava flows
B) Viscous lava and pyroclastic eruptions
C) Lava fountains
D) Fissure eruptions
E) Eruptions beneath the seafloor
An especially effective strategy for reducing intraspecific competition is
A. Eating fruit before it is ripe for other species B. Resource partitioning C. Assigning different ecological niches for juveniles and adults of the same species D. Rapid reproduction
Pesticide use ________
A) poses no environmental threat in this country B) will be eliminated as pests decrease as a consequence of years of pesticide use C) can be eliminated by changing the season when crops are planted D) will not be a problem as we learn to genetically modify predators E) may be a necessary part of modern technological agriculture