Year 4 - Density and Viscosity

Date: 16th Sep 2024 @ 9:21pm

Some tricky new vocabulary for Year 4 today. We learned all about density (heavy) and viscosity (thickness) of liquids and did some little experiments to find out more. Oil is less dense (‘heavy’) than water, so it ‘floats’ on top of the water. The fizzy tablet makes a gas (carbon dioxide). Gases are less dense (‘heavy’) than water or oil, so it goes up through both liquid layers. When the gas goes up, it mixes some of the particles of oil and water together. Different liquids have different viscosities (thicknesses). The more viscous the liquid is, the longer it takes for the bubble to move through. In liquids that are more viscous, the particles are closer together than in less viscous liquids.