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Density & Buoyancy

Science, Grade 3

 
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© Copyright NewPath Learning. All Rights Reserved. 94-4369 Visit www.newpathlearning.com for Online Learning Resources. What is Density? Did you ever wonder why some small objects weigh more than larger objects? It depends on their density. Density is a measure of how much matter fits into a certain amount of space. Density & Buoy ancy Measuring Density To find out the density of an object divide its mass by its volume. Which do you think has a greater density - a bowling ball or a basketball? If you guessed the bowling ball, you’re correct! Buoyancy and Density Buoyancy is a property that demonstrates whether an object is more or less dense than water. Density and buoyancy are closely related. An object will float in water (have buoyancy) if it’s less dense than water and sink if it’s more dense. density = mass volume density = mass volume solid filled with air more dense than water - sinks less dense than water - floats
© Copyright NewPath Learning. All Rights Reserved. 94-4369 Visit www.newpathlearning.com for Online Learning Resources. Pause & Review Which objects will sink or float in water? Write the name of the objects in the T-chart. Why will some objects float and some objects sink? ____________________________ __________________________________________________________________________ __________________________________________________________________________ Float Sink Density & Buoy ancy __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ __________________________________