Refer to the figure above. What can you conclude from the data shown on this graph alone?
A) The carbon dioxide concentration varies naturally, but is much higher today than it has been in the past 800,000 years.
B) Human activity has caused the carbon dioxide concentration to rise and fall many times in the past 800,000 years.
C) Changes in the carbon dioxide concentration are the causes of ice ages.
D) If current trends continue, carbon dioxide will soon be the most abundant gas in Earth's atmosphere.
A) The carbon dioxide concentration varies naturally, but is much higher today than it has been in the past 800,000 years.
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A 5.00-kg box slides 3.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?
A) 1.50 B) 0.587 C) 0.153 D) 0.306 E) 0.200
Long-period comets are believed to come from the ______________
Fill in the blank(s) with correct word
Two lenses, the first with focal length 10.0 cm and the second with focal length -12.5 cm, are separated by 20.0 cm. An object, 2.40 cm tall, is 15.0 cm in front of the first lens. Where is the final image?
A. 20.0 cm after the second lens B. 12.5 cm after the second lens C. 5.60 cm after the second lens D. 50.0 cm after the second lens E. 100 cm after the second lens
Sediments are classified according to the source of their constituents into two main groups. One is chemical. What is the other?
a. Physical b. Clastic c. Detrital d. Inorganic