Deficiency of which mineral is associated with goiter?
A) copper
B) iodine
C) iron
D) zinc
B
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In a mixed forest, where are deciduous trees found as compared to evergreens?
a. on the soil with more clay b. on less acidic soil c. on the thicker soil d. on shallower slopes e. at lower elevations
In the last few years improvements in technology have allowed geologists to date single grains of some minerals in rocks
A geologist separates 5 grains of the mineral zircon, which can be dated by the Uranium-lead method, and the crystal retains parent and daughter through weathering, erosion, and deposition. Thus, dating each mineral grain only gives the age of the source rock that was eroded, to produce that sand, from which the zircon grain is derived. The 5 grains yield ages of 160, 110, 2020, 66, and 162 million years. What do these ages tell you about the age of the sedimentary strata? A) They are between 160 and 162 million years. B) They are younger than 66 million years. C) They are Precambrian rocks, older than 2020 million years. D) There are no age constraints from this data; sedimentary rocks cannot be dated by geochronology.
Environmental science should not be confused with ____, which is a social movement dedicated to protecting the earth's life and its resources.
A. environmentalism B. ecology C. the conservationist view D. environmental ethics E. planetary management
As water changes states from liquid to vapor, energy is absorbed
Indicate whether the statement is true or false