Density Review.

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Presentation transcript:

Density Review

Why did the Titanic sink?

Mass Mass is a measure of the amount of matter The units are grams

Volume The amount of space an object occupies The units are liters or cubic centimeters (cm3) or milliliters (mL). 1 cubic centimeter = 1 milliliter

Read volume measurements at the meniscus 53 mL

6.6 mL 21.5 mL

Calculating Density The formula: D = m v Units are g/cm3 D m V

Density Review All matter has a characteristic density water = 1.0 g/cm3 copper = 8.8 g/cm3 Float: Yes or no? plastic = 0.93 g/cm3 Float: Yes or no? wood = 0.7 g/cm3 Float: Yes or no? By comparing densities, you can predict whether an object will float or sink in a fluid.

Buoyancy and density Buoyancy is a force that pushes objects upward in a fluid (like water) The buoyant force can be increased by displacing more fluid.