Pose questions that lead to exploration and investigation of combining liquids and solids.

Investigate how liquids change when they are poured into different containers.

Describe examples of useful objects and materials in their environment that are made by combining different liquids or solids and liquids.

Investigate and describe the changes in characteristics of familiar solids and liquids resulting from processes such as mixing and dissolving liquids with liquids, solids with solids, and liquids with solids.

Distinguish between familiar solids (e.g., sand, sugar, salt, gravel, soil, and drink crystals) that dissolve in water and those that do not.

Carry out an investigation to determine the relative viscosity of different liquids (e.g., water, milk, and syrup) when placed on various surfaces (e.g., paper, paper towel, cotton, plastic, and wax paper).

Design and carry out an investigation to determine the rate and ability of various materials (e.g., paper, paper towel, cotton, plastic, and wax paper) to absorb liquids and explain how these capabilities determine their uses.

Use a variety of sources (e.g., newspapers, Elders, anglers, books, videos, and Internet) to gather information about objects that sink and float (e.g., canoes, kayaks, barges, boats, buoys, and fishing lures).

Demonstrate an understanding of sinking and floating by solving a related practical problem such as building an object that will float, carry a load, and be stable.

Assess ways people use knowledge of solids and liquids to maintain a clean and healthy environment (e.g., filtering water, sorting solids for recycling, cleaning up a kitchen spill, washing dishes, cleaning paint brushes, using hand cleaners, wearing a paint smock).