Which of the following might be considered a viable application of a radioactive tracer?
A. embedding a radioactive plug in a valuable necklace so that its location can be determined using a Geiger counter
B. adding a stream of radioisotopes to waste water to examine where pollution goes when it flows into the ocean
C. placing radioactive sources around a room to trace the location of people as they move through the room
D. all of the above
E. none of the above
Answer: B
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Which biome would be found primarily in the temperate zone?
A) desert B) tundra C) savanna D) boreal forest E) deciduous forest
The densities of the coinage metals (copper, silver and gold) are as follows: copper = 8.95 g/cm3 silver = 12.59 g/cm3 gold = 19.32 g/cm3 A sample of material is found to weigh 14.03 grams, and have a volume of 1.20 cm3. The sample could be which of the coinage metals?
A) copper B) silver C) gold
In a true slide, movement of a coherent mass of material occurs along a well-defined plane.
Answer the following statement true (T) or false (F)
Where was North America 150 million years ago?
A. over the south pole B. next to Antarctica C. next to Australia D. closer to Africa and South America E. None of these choices are correct.