In what geologic era did man evolve?
Man evolved in the Pleistocene epoch, which began about 2.5 million years ago and ended about 10,000 years ago.
We now live in the Recent (or Holocene) epoch, beginning about 10,000 years ago.
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What is avoirdupois weight?
Avoirdupois weight is the system we use whenever we measure a grain, dram (27.3 grains), ounce (16 drams), or pound (16 ounces).
How much of the body is made up of bones?
Strong and light, the skeleton of the average person accounts for less than 20 percent of body weight.
What are the highest and lowest elevations in the United States?
The highest elevation is Mount McKinley, Alaska, at 20,320 feet. The lowest is Death Valley, California, at 282 feet below sea level. The average elevation of the United States is 2,500 feet.
How far can a U.S. Army Pershing missile travel?
The 34.5-foot, 10,000-pound surface-to-surface Pershing missile has a range of approximately 400 miles.
What makes houseplants turn toward the light?
Growth hormones called auxins makes houseplants turn toward the light. When light falls on one side of a plant, the auxins tend to concentrate on the shaded side, causing the cells on that side to grow longer. As a result, the plant gradually leans toward the light. This bending movement in response to an outside…
How much skin covers the human body?
The average body has 14 to 18 square feet of skin.