To say that an object is electrically polarized is to say
A. its internal electric field is zero.
B. it is electrically charged.
C. its charges have been rearranged.
D. it is only partially conducting.
Answer: C
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The expansion of desert-like landscapes, generally as a result of human activities in marginal lands, is called _______________
Fill in the blank(s) with correct word
Of the following animals in Namibia that compete for many of the same resources, which one has carved out a niche by being able to withstand very high temperatures?
A) Southern yellow-billed hornbill B) Zebra C) Agama lizard D) Elephant
The composition of soil is best described as
A) approximately 45% organic matter, 50% mineral matter, and 5% water and air. B) roughly 45% mineral matter, 5% organic matter, and 50% air and water. C) pebbles, gravel, cobbles, and a varying combination of sands, silts, and clays. D) the very thin surface layer rich in organic matter with some other mineral matter in the mix. E) primarily mineral matter (approximately 72%), but also consists of organic matter (10%), and water (18%).
This drainage pattern looks like the veins on the underside of a leaf:
a - trellis b - dendritic c - centripetal d - radial e - annular