Rocks

 NEXT GENERATION SUNSHINE STATE STANDARDS (NGSSS) 

Kindergarten: SC.K.P.8.1 - Sort objects by observable properties, such as size, shape, color, temperature (hot or cold), weight (heavy or light) and texture. 

1st Grade: SC.1.P.8.1 - Sort objects by observable properties, such as size, shape, color, temperature (hot or cold), weight (heavy or light), texture, and whether objects sink or float. 

2nd Grade: SC.2.P.8.1 - Observe and measure objects in terms of their properties, including size, shape, color, temperature, weight, texture, sinking or floating in water, and attraction and repulsion of magnets.