Over the span of 70 million years, Earth's climate
A) was much cooler in the distant past than the present.
B) has remained fairly constant, only showing a warming trend during the past 200 years.
C) was much warmer in the distant past than the present.
D) was warmest approximately 10 million years ago and coolest about 56 million years ago.
Answer: C) was much warmer in the distant past than the present.
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If in the pea-Moon experiment you used a grape rather than a pea, you would have to hold the grape
A. farther from you. B. nearer to you. C. the same distance.
Earth's climate changes on timescales of about 23,000 to 400,000 years caused by ________.
A. human activity B. plate tectonics C. sun spots D. Milankovich cycles E. volcanic eruptions
An erosional surface that separates strata that are parallel with one another is called a(n) ____
a. angular unconformity b. disconformity c. nonconformity d. hiatus e. bedding plane
The main source of energy for a hurricane is the:a
upper-level jet stream. b. rising of warm air and sinking of cold air in the vicinity of weather fronts. c. warm ocean water and release of latent heat of condensation. d. ocean currents and tides