This sink float identify worksheet lets first graders predict whether an apple, rock, duck, and more will sink or float in water. Includes an answer key for a fun, hands-on introduction to density.

Using Sink or Float Activity, students sort the picture onto the sink or float mat to identify objects that sink and float.

This Density and Volume in Metric Worksheet asks 3rd graders to choose the best metric unit—grams, kilograms, milliliters, or liters—for ten everyday objects. Answer key included for fast, no-prep measurement practice.

Using Sink Float Examples Worksheet, students draw examples of objects that sink and float.