Determined from the Vostok ice core?
What will be an ideal response?
The temperature changes, ?T, were determined from measured values of the deuterium content of the Vostok ice core. The section of the Vostok ice core that has been fully analyzed is about 3.5 km deep and it extends back for almost 450,000 years. The Dome C record mentioned in the text is about 3.3 km deep and extends back about 800,000 years.
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Which of the following are produced when acetic anhydride reacts with methanol?
A) only propanoic acid B) only methyl acetate C) formic acid and methyl acetate D) acetic acid and methyl acetate
Which of the following removes larger particles from sewage by screening or settling?
A. primary sewage treatment B. tertiary sewage treatment C. activated sludge sewage treatment D. secondary sewage treatment
The reason scientists believe the reflective bright nebulae contain more heavy materials than the emission bright nebulae is that ________
A) they are dimmer than a low density source could produce B) they are blue, and that color is associated with carbon C) they reflect more colors than the emission nebulae D) they glow brighter than an energy emission source could produce E) they are brighter than a low density source could produce
Soil strength is primarily a function of cohesion, friction, and vegetation
Indicate whether the statement is true or false