Water Cycle 
FOURTH GRADE
4 week unit

1. Students should know the water cycle.
2. Students should understand the results of surface tension.
3. Students should understand why ice floats.
4. Students should be able to compare the properties of salt and fresh water.
5. Students should be able to understand ions.
6. Students should understand ions.
7. Students should have an understanding of how wind is created.
8. Students should recognize atmosphere pressure.
9. Student should recognize cool and warm air masses.
10. Students should recognize that different fronts create weather.
11. Students should be able to read weather maps.
12. Students should recognize the different between weather and climate.

OVERVIEW OF FOURTH GRADE

WEEK 1.
PRE: Comparing different reservoirs of water.
LAB: Experimenting with surface tension and capillary action.
POST: Discovering why icebergs float.

OCEANS

WEEK 2.
PRE: Comparing fresh and salt water.
LAB: Discovering that salt water is an electrolyte.
POST: Distinguishing bodies of salt water.

ATMOSPHERE

WEEK 3.
PRE: Discovering the affect of air pressure.
LAB: Comparing how substances heat up.
POST: Exploring how wind is created.

WEATHER

WEEK 4.
PRE: Exploring different weather fronts.
LAB: Comparing satellite photos and weather maps.
POST: Discovering weather and climate patterns of California.