This learning progression relates to the Next Generation Science Standards’ Arguing from Evidence science and engineering practice.
Particulate Explanations of Physical Change, Arrangements and Movements (strand C) Learning Progression
Level 3: Can explain why a volume of ice contains fewer molecules than the same volume of water.
Water molecules occupy more space when the water evaporates and they are moving more freely.
Level 2: Knows that a given volume of ice contains fewer molecules than the same volume of water.
Knows that in ice the spaces between the molecules are empty.
Level 1: Can describe the arrangements molecules in ice, water and water vapor. Can describe the movements of molecules in ice, water and water vapor. Knows that a given volume of water vapor contains fewer molecules than the same volume of liquid water.