It is now possible to determine if the earth's climate is changing based on data for a few years.
Answer the following statement true (T) or false (F)
False
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How many oxide ions (O-2 ) are needed to balance the positive charge of a titanium ion (Ti+4)?
A) 2 B) 1 C) 3 D) 4 E) 6
Radium-226 is a common isotope on Earth, but has a half-life of about 1600 years. Given that Earth is some 5 billion years old, why is there any radium at all?
A. Radium-226 and Radium-218 undergo a series of transmutation reactions of alpha and beta decay to repeatedly become one another approximately every 1600 years. B. Radium-226 is a "daughter" isotope and the result of the radioactive decay of uranium. C. Radium-226 is one of several self-transmutating isotopes of the elements of the periodic table and is able to replenish itself so that it is never depleted. D. Radium-226 and Astatine-218 are converted back and forth via transmutation to one another at each of their respective half-life cycles.
Which of the following is a correct statement about soil structure?
A. The particle size of the parent material determines the soil's ability to hold water and air. B. Soil organisms decrease the pore space in soils. C. Soils with high amounts of clay are highly friable. D. Sandy soils hold water.
Generally speaking, which seismic waves will have the greatest amplitude on a seismogram?
A) P waves B) S waves C) Surface waves