Water Cycle 
SECOND GRADE
4 week unit

1. Students should know the basic properties of water.
2. Students should be able to analyze a clear liquid.
3. Students should understand the major components of the water cycle.
4. Students should begin to distinguish polluted from clean water.
5. Students should begin to understand why the oceans are salty.
6. Students should recognize that air is all around us.
7. Students should begin to distinguish climate from weather.
8. Students should recognize the elements of weather.

OVERVIEW OF SECOND GRADE

WEEK 1.
PRE: Exploring the properties of water.
LAB: Experimenting with different soap mixtures.
POST: Analyzing the water cycle.

OCEANS

WEEK 2.
PRE: Interpreting how water is recycled.
LAB: Distinguishing polluted, dirty, and clean water.
POST: Comparing solvents and solutes.

ATMOSPHERE

WEEK 3.
PRE: Distinguishing air.
LAB: Experimenting with air and water.
POST: Interpreting why water is important in the atmosphere.

WEATHER

WEEK 4.
PRE: Comparing climate and weather.
LAB: Exploring how topography influences climate.
POST: Discovering the four elements of weather.