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Saturday, 3 June 2017

Volume, density and mass lab


Volume, density and mass lab

          To measure the volume of the irregular-shape items such as rocks, we can use water to do it.

In this lab, we filled 150 ml of water into a beaker and then put the rock into the water. The extra 

volume above 150 ml equals to the volume of the rock we put in. But sometimes the level of water 

was over 200 ml, so we use graduated cylinder to measure that volume.

               And to find density of the rocks, we have to divide the rock weight by its volume or use the 
formula of D=M/V.

Sample Number.
Weight gram
Volume ml
Density g/ml
1
125.6 g
50 ml
2.512 g/ml
2
135.6 g
50 ml
2.712 g/ml
3
46.0 g
50 ml
0.92 g/ml
5
45.0 g
45 ml
1.0 g/ml
6
111.3 g
50 ml
2.226 g/ml
7
244.5 g
77 ml
3.2 g/ml
9
199.2 g
100 ml
1.992 g/ml
11
98.8 g
19 ml
5.2 g/ml
12
147.0 g
60 ml
2.45 g/ml

 



How could you use the densities to identify the minerals?
          Different minerals will have different density. The same type of minerals would have the same density.

Would density or color be more useful in identifying a particular mineral?
          Density is more useful than color because each mineral has its own density but minerals can be same color.

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