CEDARPhysical Science

Module 2

Tom DeRosaCreation Studies Institutewww.creationstudies.org

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LESSON 3PART 1

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Air and Humidity

• Water is one of the most important components in air.

• Water evaporates in air and the air has the ability to hold it.

• Humidity Defined: how much moisture (water) is in the air

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SweatingSweating is a way we let heat out of our system.

Sweat is basically water and salt which evaporates giving us a cooling effect because it takes the heat away from our bodies.

Water + heat (from our bodies) Vapor

Heat Index

• Heat Index is a combination of heat and water temperature.

When the temperatures are high and the humidity is high like in Florida you will sweat a great deal.

When the temperatures are high and the humidity is low you don’t sweat as much.

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Temperature reached 1120F that afternoonJuly 2007 in Glendive, Montana.We did not sweat very much in the Bad Lands

• Absolute Humidity: The mass of water vapor contained in a certain volume of air.This the concentration of water vapor in the air. Saturated is when the air has reached its maximum concentration.

• Relative Humidity: is given in percent and compares the amount of water vapor the air has at certain temperature and to the maximum amount it can store.

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How we feel

• For example, if the air temperature is 75 degrees Fahrenheit (24 degrees Celsius) and the relative humidity is zero percent, the air temperature feels like 69 degrees Fahrenheit (21 C) to our bodies. If the air temperature is 75 degrees Fahrenheit (24 C) and the relative humidity is 100 percent, we feel like it's 80 degrees (27 C) out. People tend to feel most comfortable at a relative humidity of about 45 percent.

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Relative Humidity

• Pompano Beach, Florida • Current Conditions• Partly Sunny 86ºF • High/Low 90º/77º

• Relative Humidity 66 % • Pressure 30.00 in Visibility 10 mi Wind

Direction SE

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The Composition of Air

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Other Gases Ozone – variableSulfur Oxides-variableNitrogen Oxides – Variable

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Oxygen 20.95 23.20 32.00 O2 90.2 -182.95

Nitrogen 78.09 75.47 28.02 N2 77.4 -195.79

Carbon Dioxide 0.03 0.046 44.01 CO2 194.7 -78.5

Hydrogen 0.00005 ~ 0 2.02 H2 20.3 -252.87

Argon 0.933 1.28 39.94 Ar 84.2 -186Neon 0.0018 0.0012 20.18 Ne 27.2 -246

Composition by volume

• Oxygen 20.95 • Nitrogen 78.09 • Argon 0.933 • Carbon Dioxide 0.03 • Neon 0.0018• Hydrogen 0.00005

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A Privileged Planet

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The composition of the earth’s atmosphere is not only unique in the solar system but through out the Universe. God has created the earth to have life on it.

For this is what the LORD says - he who created the For this is what the LORD says - he who created the heavens, he is God; he who fashioned and made the heavens, he is God; he who fashioned and made the earth, he founded it; he did not create it to be earth, he founded it; he did not create it to be empty, but formed it to be inhabited — he says: "I empty, but formed it to be inhabited — he says: "I am the LORD, and there is no other.” am the LORD, and there is no other.” Isaiah 45:18Isaiah 45:18

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Combustion • When Oxygen combines with substance and it

ignites into heat and light it is called combustion

• The Oxygen gas is perfect to combine with living systems to give them energy to live.

• If the amount of Oxygen is increased by 1 % there will 70% the Natural Forests Fires.

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