Ques:Q: Where is the pressure of gases in the atmosphere at its greatest? Choices: - stratosphere - core - mountain ranges - sea level A:

Ans:sea level
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Ques:Q: Scientists around the world study speciation, documenting observations both of living organisms and those found in the fossil record. as their ideas take shape and as research reveals new details about how life evolves, they develop models to help explain what? Choices: - spontaneous mutation - creation theory - food chains - rates of speciation A:

Ans:rates of speciation
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Ques:Q: Which state of matter lacks a fixed volume, fixed shape, and consists of charged particles? Choices: - electrons - atoms - isotopes - ions A:

Ans:ions
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Ques:Q: The ostwald process is the commercial method for producing what? Choices: - citric acid - deoxyribonucleic acid - chlorine - nitric acid A:

Ans:
nitric acid
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