Activated sludge sewage treatment is a type of primary wastewater treatment.
Answer the following statement true (T) or false (F)
False
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At what time of year is the earth's axis not tilted either toward or away from the Sun?
A) autumnal equinox B) aphelion C) summer solstice D) perihelion E) winter solstice
The soil shown in the photograph below has a reddish tint, which may mean that
A. it has been waterlogged at some point. B. it has abundant aluminum and/or iron oxides. C. there are salts or other minerals that have been deposited by the evaporation of water. D. it contains abundant organic matter.
The rocks gabbro or basalt mostly contains:
a) Olivine b) Pyroxene and calcium-rich plagioclase feldspars c) Amphiboles d) Biotite e) Quartz and potassium feldspar
Tertiary-sector jobs involve the
A) the harvesting of agricultural products. B) extraction of materials from Earth. C) provision of services. D) manufacturing of raw materials.