Hydrologic Cycle (TX Aquatic Science)

The Ultimate Recyclable: Water

Examine the properties of the hydrologic cycle and recyclable water

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We will...

or the "water cycle" is the never-ending cycle of water moving from one form to another

What is the hydrologic cycle?

Hydrologic Cycle explained:

• Powered by GRAVITY and SOLAR ENERGY

• Every molecule of water on Earth travels through this cycle

• No beginning or end

• Evaporation- water changes into water vapor when heated

• Transpiration- water vapor released by plants during photosynthesis

• Condensation- water vapor cools and is suspended in the form of clouds, fog, mist, or ice crystals

• Precipitation- rising air cannot "hold up" the water droplets. Precipitation falls in the form of rain, snow, sleet, or hail

Multiple Choice

What is evaporation?

• Water cools and it rains

• Sleet, snow, hail

• Water warms into water vapor and rises

• Clouds forming

Multiple Choice

What is this an example of?

• Evaporation

• Condensation

• Precipitation

• Transpiration

Multiple Choice

What is this an example of?

• Precipitation

• Condensation

• Evaporation

• Transpiration

Multiple Choice

What is this an example of?

• Condensation

• Evaporation

• Precipitation

• Transpiration

Open Ended

In our area, which phase of the water cycle do you think water spends most of its time?

Water can pick up contaminants from the air, such as smog (seen to the right)

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​Acid Rain

Polluted Precipitation

• Every time water evaporates, it leaves behind whatever salts, pollutants, or other impurities that were dissolved in it and becomes pure again

• As soon as the water is exposed to air or the Earth's surface, it can pick up pollutants again

• This is why rain can be polluted with contaminants found in the Earth's atmosphere

• When this water "falls" back down to the Earth as precipitation, this is how you can have acid rain, smog, or toxic vapors from incinerators and power plants

Open Ended

How can acid rain or smog impact life?

• About 85% of the world's precipitation falls into the oceans

• The remaining 15% will fall on land

Conclusion

Open Ended

EXIT QUESTION: Describe 1 thing that you learned from this lesson today: