Question to investigateĭo different amounts of water have the same density? Materials for each group
#DENSITY WATER HOW TO#
Explore Discuss with students how to find the volume and mass of water.Look at the teacher version of the activity sheet to find the questions and answers. The Explain It with Atoms and Molecules and Take It Further sections of the activity sheet will either be completed as a class, in groups, or individually depending on your instructions. Students will record their observations and answer questions about the activity on the activity sheet.
So it is possible that different amounts of water could have the same density.
The bucket with less mass has less volume. Could both the small and large amounts of water your classmate lifted have the same density? Students may point out that the bucket with more water has more mass but a greater volume. But students may realize that they should somehow find the mass and volume of the water first. It is meant as a lead-in to the investigation. How do you think you can find the density of a liquid like water? Students are not expected to be able to fully answer this question at this point. Because D=m/v, water must also have density. Do you think a liquid, like water can have a density? Students should realize that water has volume and mass. The bucket containing more water has more mass.Īsk students: In lessons 3.1-What is Density? and 3.2-The Water Displacement Method, you found the density of solids, by measuring their mass and volume. 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. Engage Do a demonstration to introduce the idea that water has density.Two identical buckets or large containers.Balance that measures in grams (able to measure over 100 g).Make sure you and your students wear properly fitting goggles. The activity sheet will serve as the “Evaluate” component of each 5-E lesson plan. Evaluationĭownload the student activity sheet, and distribute one per student when specified in the activity. 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.