Solar Nebula Hypothesis (#2)
What will be an ideal response?
> The nebula began to spin faster and faster because all of its mass was now concentrated in one central region. The nebular cloud began to collapse under the force of its own gravity. Took about 100,000 years.
> During that time, most of its mass became more and more concentrated toward the center & progressively hotter and hotter.
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An arrangement where a developing nation protects some forest area in exchange for debt relief or financial support from a developed nation is called
A. bankruptcy. B. a conservation easement. C. a land sale. D. a debt for nature swap. E. a conservation concession.
Which was not an incorrect assumption or estimated value made by geology professor John Joly to determine the 80 to 100 million year age of Earth based on the salinity of the oceans?
A) The salt content of river water through time. B) The volume of the ocean. C) The amount of ancient rock salt. D) The salinity of seawater.
The largest linguistic family in this world region is Niger-Kordofanian
Indicate whether the statement is true or false
Pluto was discovered in 1930, becoming the 9th planet in the solar system. As telescopes improved, other Sun-orbiting objects were discovered. Some of those were even larger than Pluto. By 2005, it was becoming apparent that many more objects would soon be discovered and that the number of planets in the Solar System could swell to as many as 50. After much debate, scientists in the International Astronomical Union (IAU) concluded that Pluto and the other similar celestial bodies orbiting the Sun should be classified as "dwarf" planets. Since a "planet" must clear the space surrounding its orbit, our Solar system now has 8 planets.Why weren't the other Pluto-like objects discovered earlier?
A. Scientific explanations make predictions. B. Science is limited by technology. C. Scientific explanations are tentative. D. Scientific hypotheses are falsifiable.