Could both the small and large amounts of water your classmate lifted have the same density?.But students may realize that they should somehow find the mass and volume of the water. It is meant as a lead-in to the investigation. Students are not expected to be able to fully answer this question at this point. How do you think you can find the density of a liquid like water?.Because D=m/v, water must also have density. Students should realize that water has volume and mass. Do you think a liquid, like water can have a density? In Lessons 1 and 2, you found the density of solids, by measuring their mass and volume.The bucket containing more water has more mass. Ask the student volunteer which bucket appears to have more mass.Select a student to lift both buckets of water.Half-fill one bucket and add only about 1 cup of water to the other.Two identical buckets or large containers.Students will be able to explain that since any volume of water always has the same density, at a given temperature, that density is a characteristic property of water. Students will be able to measure the volume and mass of water and calculate its density. Students make a graph of the relationship between the volume and the mass of water. Then they measure the mass of different volumes of water and discover that the density is always the same. Students measure the volume and mass of water to determine its density. The density of a substance is the same regardless of the size of the sample.The density of water is 1 gram per cubic centimeter.Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume D = m/v.The mass and size of the molecules in a liquid and how closely they are packed together determine the density of the liquid.The molecules of different liquids have different size and mass.The volume of a liquid can be measured directly with a graduated cylinder.Just like solids, liquids also have their own characteristic density.
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