EVS (Looking Around)Class 3Full Content

Water O Water

Sources of water, uses, water cycle, conservation.

Key Topics

Sources of Water

Natural sources: Rivers (Ganga, Yamuna), Lakes, Ponds, Rainfall, Groundwater (wells, borewells), Oceans. Man-made: Dams, Reservoirs, Water tanks. 97% of Earth's water is in oceans (salty). Only 3% is freshwater. Most freshwater is frozen in glaciers.

Uses of Water

Open topic

We need water for: Drinking (must be clean), Cooking, Bathing, Washing clothes and utensils, Agriculture (farming needs 70% of all water used), Industries, Generating electricity (hydro power). An adult needs about 2-3 litres of water per day for drinking.

Water Conservation

Open topic

Water is precious — save it! Ways to save water: Turn off taps when not in use, Fix leaking pipes, Collect rainwater (rainwater harvesting), Use bucket instead of shower, Water plants in the morning or evening. India has water scarcity in many regions during summer.

Experiments

Water Cycle in a Bag

Objective: Observe the water cycle process

Materials: Zip-lock plastic bag, Water, Blue food colouring, Tape, Sunny window

Result: You will see water evaporate and condense, just like the real water cycle

Safety: Seal the bag properly to avoid spilling

💬 Comments(0)

Be the first to comment! 🎉