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Do Now for 1/29/13

Do Now for 1/29/13. Take out HW HW: Complete chart Complete analysis questions 1 through 5. C31 Willow Grove’s Troubled Waters. Today’s Target: I will be able to identify possible sources of water contamination. Check HW C30 – Vocabulary Introduce activity Reading KWL Chart

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Do Now for 1/29/13

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  1. Do Now for 1/29/13 Take out HW HW: Complete chart Complete analysis questions 1 through 5

  2. C31 Willow Grove’s Troubled Waters • Today’s Target: I will be able to identify possible sources of water contamination. • Check HW • C30 – Vocabulary • Introduce activity • Reading • KWL Chart • C31 Vocabulary • Analysis questions 1 through 5 on page C-10

  3. C30 Vocabulary • C30 • 1. Dissolved solids: Any solid materials dissolved in water, typically while the water is in contact with earth materials. Dissolved solids are most commonly metal ions like calcium, sodium, and magnesium. • 2. Distilled water: Water that has been heated and re-condensed so as to drive off mineral impurities. Distilled water may have a slightly acidic pH. • 3. Spring water: Water that comes from an underground spring or comes out of the ground on its own and is bottled.

  4. C31 Willow Grove’s Troubled Waters • Where does drinking water come from? • How might drinking water become polluted or contaminated? • Contamination – Any substance picked up by water. • Packet Handout - Take out student sheet 31.1

  5. C31 Willow Grove’s Troubled Waters • Read background on page C-7. • Read first section on page C-8 • Complete first two columns of the KWL chart (student sheet 31.1) K=Know, W=Want to know. • Read the remainder of the activity. • Complete the L column. • Complete the analysis questions.

  6. C31 Vocabulary • 1. Contaminant: Impurities in a substance. • 2. Contaminate: To introduce or mix a substance into an otherwise pure substance, to pollute. • 3. Contamination: When a pure substance has had impurities introduced into it.

  7. C31 Key Points • 1. Drinking water comes from either surface water or ground water • Surface water examples • Ground water examples • 2. Water may contain chemical or biological contaminants, which may have come from wastewater. • 3. Thinking critically about evidence includes deciding which evidence should be used.

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