Show students a cup of water and ask them to describe what they see (e.g., “The water is clear,” “It’s in a plastic cup”). For example, ask, “What do you think will happen if we add food coloring to t...Show students a cup of water and ask them to describe what they see (e.g., “The water is clear,” “It’s in a plastic cup”). For example, ask, “What do you think will happen if we add food coloring to the water?” Guide students to form simple hypotheses like, “The water will turn blue.” Objective: Students will understand the concept of density and apply the scientific method to predict and test which objects will float or sink in water.