For decades, science popularizers have said humans are made of stardust, and now, a new survey of 150,000 stars shows just how true the old cliché is: Humans and their galaxy have about 97 percent of the same kind of atoms, and the elements of life appear to be more prevalent toward the galaxy's center, the research found.
The crucial elements for life on Earth, often called the building blocks of life, can be abbreviated as CHNOPS: carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur. For the first time, astronomers have cataloged the abundance of these elements in a huge sample of stars.
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Explanation:
This is because;
Rare animals are animals that are not common or species that are not common.
Protected animals are animals that are endangered and common.
Rare animals are animals that are not easily accessible.
Protected animals are common and are protected because they can easily be accessible.
Rare animals are animals that are not easily observed or recorded.
Protected animals can easily be observed and protected.
Rare animals are animals that are secretive and have shy behavior.
Protected animals behavior are not secretive in behavior.
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Acids are substances that provide hydrogen ions (H+) and lower pH, whereas bases provide hydroxide ions (OH–) and raise pH. The stronger the acid, the more readily it donates H+. For example, hydrochloric acid and lemon juice are very acidic and readily give up H+ when added to water. ( source : https://courses.lumenlearning.com/wmopen-nmbiology1/chapter/the-ph-scale/ )