Presentation on theme: "What makes an ice cubes float in water ? Write your response in two sentences."— Presentation transcript:
What makes an ice cubes float in water ? Write your response in two sentences
Proof that water and ice have different densities
Density is defined as mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object. Density is the amount of matter within a certain volume.
DENSITY EXPLAINED https://m.youtube.com/watch?v=SimFy9wOMXY
To find the density Mass is the amount of matter that it is in an abject. You find mass by using a triple beam balance to determine the (g) of an object. 1. Find the mass of the object ______ g Volume is how much space an object takes up. You measure volume of a solid by length x width x height. You measure a volume of liguid by using a graduated cylinder. To calculate the volume of an irregular shape, use water displacement. 2- Find the volume of the object Formula for density: 3 - Divide Density = Mass Volume
Units for Density g/cm cubed= density of a solid g/ml = density of a liquid
Units for density g/cm 3 or g/ml Formula: M = mass V= volume D = density M = D x V V = M / D D = M / V
1)Find the mass of the object 2)Find the volume of the object 3)Divide : Density = Mass - Volume To find density : Ex. If the mass of an object is 35 grams and it takes up 7 cm 3 of space, calculate the density.
1)Find the mass of the object 2)Find the volume of the object 3)Divide : Density = Mass - Volume To find density : Set up your density problems like this: Given: Mass = 35 gramsUnknown: Density (g/ cm 3 ) Volume = 7 cm 3 Formula: D = M / VSolution: D = 35g/7 cm 3 D = 5 g/cm 3 Ex. If the mass of an object is 35 grams and it takes up 7 cm 3 of space, calculate the density.
Liquid Layers – Try on your own Imagine that the liquids on the right have the following densities: –15g/cm 3 10g/cm 3 –3g/cm 3 9g/cm 3 –7g/cm 3 12g/cm 3 Match the colors to the correct densities
Review What is the formula for density? What happens if you pour together liquids that have different densities? Will the liquid on the top have the highest or lowest density? Will the liquid on the bottom have the highest or lowest density?