How do stalagmites enter into the debate on global warming? What will be an ideal response?
Stalagmites are calcium carbonate precipitated from evaporating water in caves, and each new layer of
rock is younger than the previously precipitated layer. Using uranium 234 to thorium 230, geologists
can date stalagmites back to 500,000 years. Crevice Cave in Missouri reveals climate and vegetation
75,000 to 25,000 years ago, and these dates are then correlated with other data to create a detailed
picture of climate change in this period. It is important to be able to reconstruct past climate accurately
to see how Earth's climate system has responded to changes in the past.
You might also like to view...
The prime meridian is also known as (the)
A) international date line. B) 0 (zero) degrees longitude. C) 0 (zero) degrees latitude. D) equator. E) North Pole.
Carbonic acid forms from a combination of ____
A)water and bicarbonate ion B)water and carbon dioxide C)carbon dioxide and hydrogen ion D)calcium ion and bicarbonate ion
If a country is experiencing a negative net migration rate, then
A) more people are moving to the country than leaving it. B) the number of people leaving the country is equal to the number moving there. C) more people are dying in the country than are being born. D) more people are leaving the country than moving to it. E) a negative net migration rate does not tell us anything.
Identify some of the key ethnic minority groups (as defined by language and religion) within Russia and neighboring states
What will be an ideal response?