Question

1. a student has two beakers full of water. they add 5 drops of blue food coloring to beaker a and 5 drops of red food coloring and 15 grams of salt to beaker b. the student carefully adds the water from beaker b into beaker a. after a few minutes, the student observes that the red colored water is at the bottom of the beaker and the blue colored water is at the top. what property of water does this demonstrate?

options:
cohesion
surface tension
density

Explanation:

The problem involves water and its properties, specifically the layering of water with different densities (due to salt in Beaker B's water and food coloring). Density is the mass per unit volume, and when substances have different densities, they separate (more dense sinks, less dense floats). The red - colored water (with salt, higher density) is at the bottom, and blue - colored water (lower density) is at the top, demonstrating density. Cohesion is about water molecules sticking to each other, surface tension is about the surface of water acting like a film, which are not related to this layering.

Answer:

Density