Uncut forests or regenerated forests that have not been significantly impacted by humans or natural disasters for several hundred years or more are known as ____________________
Fill in the blanks with correct word
old-growth forests
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Why are meteorites used to establish an age for the Earth?
A. Rocks on Earth have been recycled since the Earth was formed and are not believed to be as old as the Earth itself. B. They are believed to be the same material from which Earth formed. C. They are not radiogenic so they do not decay over time. D. They are believed to be the same material from which Earth formed and rocks on Earth have been recycled since the Earth was formed and are not believed to be as old as the Earth itself. E. All of these are correct.
Two identical freight cars roll without friction towards each other on a level track. One rolls at 2 m/s and the other rolls at 1 m/s. After the cars collide, they couple and roll together with a speed of
A) 0.5 m/s. B) 0.33 m/s. C) 0.67 m/s. D) 1.0 m/s. E) none of the above
Carbon is fixed in the biosphere through ________ into carbohydrate compounds
A) bacteria B) biomes C) photosynthesis D) dentrification E) transit
The sky (lower tropopause) appears blue in color because of
A) diffuse radiation. B) transmission. C) absorption of blue wavelengths of visible light. D) scattering. E) reflection.