Open Density Clip

DENSITY Density is used to describe how concentrated or how packed an object is like the picture below: Less Dense More Dense

MASS Mass is the amount of matter in an object You can find the mass of an object by using different types of scales. Weight is different from mass. Weight is defined as the force of gravity on an object

VOLUME The volume of regularly shaped objects can be found by measuring their width, length, and height. You use the following formula: Volume = length x width x height.

VOLUME To find the volume of an irregularly shaped object you use the water displacement method. This method involves dropping the object into a measured amount of water and seeing how much the water level rises.

In order to find the displacement of water you must know how to read the meniscus correctly! Correct Reading: 73 mL measuring volume

What is being measured in this picture? ____________ Volume

Find the Volume of Object X 25 mL

Same volume Different Mass Different volume Same Mass

HOW DO YOU DETERMINE THE DENSITIES OF OBJECTS In order to find the density of an object you must know the mass and the volume of that object Density = mass ÷volume (d=m/v)

The Density Triangle: a good way to find any of the three: mass, volume or density Density = mass divided by volume M=mass g, mg, kg V=volume mL, L, cm³ D=density g/mL, g/L, g/cm³ M DV x

Which of these objects would float on water? Wood0.6 Quartz2.5 Ice.9 Styrofoam0.01 Aluminum2.70 Gold19.3 Water has a density of 1 Therefore an object with a density more than one will sink in water. An object with a density less than one will float in water. FLOAT SINK

AMAZING EARTH SCIENCE FACTS 1. __________is how close or compact the molecules are. 2. The ________ substance has the same density, no matter what the size. 3. As temperature increases, molecules spread out (Volume Increases) and density __________________. 4. Warm (air, water, magma) rises because it is _____________ Cold (air, water) sinks because it is more dense. 5. Density = _________________________ Density same decreases less dense Mass/Volume

6. The units used to measure density are: ______________ shaped objects---gms/cm³ ______________ shaped objects---g/ml 7.Volume for irregular objects is found by ______________________ 8.The density of water is________. 9. For objects with densities less than 1, the lower the density is, the ___________ it floats in water. Regular Irregular water displacement 1g/ml higher Watch Video Clip on Density

“Crowdedness” Do these have the same density? M = 6g V = 4cm 3 D = M = 16g V = 4cm 3 D = M = 4g V = 1cm 3 D = M = 6g V = 1cm 3 D =

Which of these has the same density? M = 6g V = 4cm 3 D = M = 16g V = 4cm 3 D = M = 4g V = 1cm 3 D = M = 6g V = 1cm 3 D =

What would be the density of another sample of the same material that is 8cm 3 ? M = 6g V = 4cm 3 D =

DENSITY LAB Density Lab

DENSITY LAB PRACTICE: DescriptionMass (g)Volume (m/L)Density (g/mL)Does it float? Rank Red Square Pink Rectangle Purple Oval Blue Square Green Triangle Red Oval What is the density of the liquid in the pail? ___________________________ Do you notice any pattern between the density of an object and the ability of the object to sink or float? Yes or No Density below 1 the object ____________________________ Density above 1 the object ___________________________ Which object has the greatest volume? _______________the least?___________ Which object has the greatest density? _____________the least?______________