Question

True or False:Write T if the statement is true and write F if the statement is false.


_______ 1. Air above big bodies of water contains more water vapor than air above deserts.
_______ 2. Dry air consists of about 78% nitrogen, 12% oxygen, 1% argon, 0.04% carbon dioxide and traces of argon, heluim, neon, krypton and xenon.
_______ 3. Useful solutions are found only in nature.
_______ 4. Many solutions are made for specific purposes.
_______ 5. Bronze is an alloy of copper and gold.
_______ 6. Brass is an alloy of copper and zinc.
_______ 7. The component present in a small amount is called 'solvent'.
_______ 8. The component present in a greater amount is called 'solute'.
_______ 9. Solute and solvent may be solids, liquids or gas.
_______ 10. Heterogeneous mixture consists of two or more phases.
_______ 11. All substances are heterogeneous.
_______ 12. The temperature of a liquid mixture varies during boiling but a liquid substance does not.
_______ 13. A solid mixture has portions that do not melt but a solid substance melts completely within a short time.
_______ 14. Compounds are also made up of two or more components.
_______ 15. Periodic table consist the list of elements.

Answer 1

Explanation:

1.troposphere

Approximately 99.13% of it is contained in the troposphere. The condensation of water vapor to the liquid or ice phase is responsible for clouds, rain, snow, and other precipitation, all of which count among the most significant elements of what we experience as weather.

Answer 2

Answer:

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