L3 Science Worksheet1 Week2

 

Water & Health Systems - L3 Science-Geography Worksheets

Week 2: Water Detective Challenge LU Value: 15 points per worksheet

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L3 MAIN WORKSHEET: Water Safety Basics

Name: _________________ Date: _________________ LU Target: 15 points

Part A: Water Testing (6 points)

1. Lab Results (3 points) The lab tested village water:

Water Source	Nitrate Level	Safe or Unsafe?
Bore Well	150 mg/L	?
Hand Pump	120 mg/L	?
Bottled Water	15 mg/L	?
Safe limit	50 mg/L	?

a) Which water should athletes drink? _________________ (1 point) b) Why is the bore well water unsafe? _________________ (1 point) c) Circle the SAFE water source above. (1 point)

2. Contamination Explanation (2 points) Draw a simple picture showing how drain water gets into wells during heavy rain. Label: drains, rain, wells, dirty water flow.

a) Where does the dirty water come from? _________________ (1 point) b) Where does it go during heavy rain? _________________ (1 point) c) Why does this make people sick? _________________ (1 point)

Part B: Water Needs (4 points)

3. Water Calculations (3 points) Calculate daily water needs:

• Rohit: 30 kg weight, plays 2 hours daily = _____ liters

• When sick, needs 40% extra = _____ liters total

• Calculate the same for Your Weight and 3 hrs of play daily

Formula: (Weight × 35 ml) + (Hours × 500 ml) + extra if sick

Part C: Staying Safe (5 points)

4. Water Safety Rules (3 points) Fill in the blanks:

a) Boil water for _____ minutes to kill germs. (1 point) b) Use _____ cleaning tablet for 1 liter of water. (1 point) c) When water looks dirty, _____ drink it. (1 point)

5. Weather Warning (2 points) When should you test village water? □ After heavy rain □ When it's sunny □ During normal rain □ When wells look clean

6. Village Mapping (3 points) On the map, mark:

• Where Khapa and Khubala villages are located

• Show how the same weather affected both places