Answer:
an area of low concentration to an area of higher concentration
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<u><em>P-waves, S-waves, and surface waves</em></u> are the three types of waves produced during an earthquake.
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Answer:
Explanation: carbon dioxide is pulled from the air and converted in to food by plants animals and human beings need to get ride of carbon dioxide through a process called respiration. this process also reduces global warming. please mark me the brainliest
X-rays
used to measure bone density.
<u>Explanation</u>:
The bones density test measured by the X-rays, it measures the content of calcium and other bone minerals that are packed into the segment of bone. Most commonly used parts of bone for testing are spine, hip, occasionally and the forearm. It is generally done to know the chances of osteoporosis. More the bone minerals, more will be density. More density means the higher bone strength. Before the test, a person should avoid having calcium supplement.