Solids and Liquids

The Solids and Liquids module provides experiences that heighten students’ awareness of the physical world. Matter with which we interact exists in three fundamental states: solid, liquid, and gas. In this module first and second graders have introductory experiences with two of these states of matter, solid and liquid.

FOSS expects students to:
  • Develop curiosity and interest in the objects that make up their world.
  • Investigate materials constructively during free exploration and in a guided discovery mode.
  • Recognize differences between solids and liquids.
  • Explore a number of liquids.
  • Observe and describe the properties of solids and liquids.
  • Sort materials according to properties.
  • Combine and separate solids of different particle sizes.
  • Observe and describe what happens when solids are mixed with water.
  • Observe and describe what happens when other liquids are mixed with water.
  • Use information gathered to conduct an investigation on an unknown material.
  • Acquire the vocabulary associated with the properties of solids and liquids.
  • Use written and oral language to describe observations.