2-ESS2-3

SCUSD NGSS Curriculum Guide ====**2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid. **====

Science Background for the Teacher:
That 90% of the Earths water is salt water. That there are many different forms of water found on Earth including snowcaps, glaciers, and running water.

Key Vocabulary:

 * || water || pond || rivers || carry || temperature ||
 * || ocean || solid || water cycle || viscosity || precipitation ||
 * || lake || liquid || evaporation || properties || condensation ||

Possible Assessments (formative and/or summative):
Label map of the world with oceans and ice caps, larger rivers, and lakes. Selected questions from FOSS I-checks and Post-test.

Key Student Activity:
Observe the globe to label bodies of water, including ice caps; observe forms of water and its properties (solid, liquid, gas); study habitats and the plants and animals in each ecosystem containing different amounts of water; use thermometer to measure freezing point, boiling point of fresh and saltwater, learning water cycle; rain gauge measurement; mix pebbles, sand, silt in a clear container with water, having students shake and then observe settling. Use science notebooks to record observations in writing, drawing, diagrams.

Need: sand box or table to demonstrate and have students experiment with water carrying earth materials from one place to another.

Saltwater vs. freshwater activities: taste test salt vs. freshwater

Graph for coloring in the amounts of fresh vs. saltwater on earth

Key Teacher Demo/Activity:
Sand table, 100ml graduated cylinders with 3ml freshwater in one, and 97ml salt water in the other.

Common Student Misconceptions:

 * Most of the water on earth is freshwater
 * Lack of understanding about different types of water
 * Steam is a liquid
 * <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Water does not evaporate into a cloud

<span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Things to Avoid/Correct:

 * <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Make certain to use appropriate scientific vocabulary

====<span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Other Resources (text, video, simulations, activities, models, etc..): ====


 * <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Visit from Santa Clara Valley Water District education


 * <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Trade books such as <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; vertical-align: baseline;">__Eyewitness Water__ <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">, <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; vertical-align: baseline;">__The Water Cycle__
 * <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">Google Earth