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Unit 1 Physical Properties of Matter Part 2 – Mass, Volume, Density.

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Presentation on theme: "Unit 1 Physical Properties of Matter Part 2 – Mass, Volume, Density."— Presentation transcript:

1 Unit 1 Physical Properties of Matter Part 2 – Mass, Volume, Density

2 What is Mass? In your own words, take 2-3 minutes and write your definition of mass (or what you think mass is). How do we measure mass?

3 Mass & Change We will now be engaging in a 4-part lab to examine a number of instances related to mass and change. If we want to see the relationship between mass and change... What kind of data do we need to collect?

4 Be sure to collect qualitative AND quantitative data through ALL parts of this activity... We want to practice good science throughout the activity – that means we should take good notes on what we observe. We should also reflect after EACH part of the activity AND draw what we think is happening with the particles at the end of EACH part.

5 Part 1 – Mass of Steel Wool Will the mass of the steel wool change if it is pulled apart?

6 Was there a change? Group #Change in mass (g).... don’t forget + or - 1 0g 2 -.24g 3 -.05g 4 -.02g 5 -.10g 6 -.2g 7 -.09g 8 -.12g

7 Part 2 – Mass of Ice & Water As the ice melts, what do you predict will happen to the mass?

8 Was there a change? Group #Change in mass (g).... don’t forget + or - 1 -.24g 2 -.4g 3 -.25g 4 -.5g 5 -.36g 6 -.4g 7 -.03g 8 -1.05g

9 Part 3 – Mass of a Precipitate Sometimes when solutions are combined, a solid forms... If we add two solutions together to make a solid, what do you predict happens to the mass?

10 Was there a change? Group #Change in mass (g).... don’t forget + or - 1 +.13g 2 -.8g 3 +.02g 4 0g 5 -.24g 6 0g 7 -1.61g 8 +.96g

11 Part 4 – Mass of Dissolved Sugar What happens when something dissolves? Predict what will happen to the mass of sugar when it dissolves in water.

12 Was there a change? Group #Change in mass (g).... don’t forget + or - 1 -.01g 2 3 4 -.33g (sugar left in container?) 5 -1.96g 6 -.12g 7 8 -.15g

13 Culminating Board Meeting Each group will be assigned a different part of the activity to whiteboard. Use the class data to help you determine the change in mass... Explain what happened in your assigned activity... – Be sure to draw what happened in the activity at the PARTICLE level.

14 Conservation of Mass Lab

15 Comparing Volume Units What is volume? How do we calculate or measure the volume of an object?

16 Calculate the volume of the objects given in cm 3 AND determine their volume in mL. How do they relate?

17 Volume Data GROUPcm 3 mL 12721 22731 32930 42730 528.8131 629.829 72729 82720

18 Measurement, Precision & Accuracy http://antoine.frostburg.edu/chem/senese/10 1/measurement/

19 Mass & Volume What relationship exists between the amount of matter (mass) and the size (volume)? Find the mass and volume for the given objects.

20 Mass & Volume Data GroupSample 1 MassSample 1 VolumeSample 2 MassSample 2 Volume 1 2 3 4 5 6 7 8

21 Density of a Gas What happened when the Alka-Seltzer “dissolved” in the water?... Does the gas produced have mass? How could we determine the density of the gas released?

22 Density of a Gas Data GroupMass (g)Volume (cm 3 )Density(g/cm 3 ) 1 2 3 4 5 6 7 8

23 Thickness of a thin layer How do you calculate the volume of a rectangular object? How could you determine the thickness of a piece of aluminum foil?

24 How many particles (atoms) thick do you think the aluminum foil is?


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