You will need:
Instructions1. Fill one glass up to the brim with the small marbles, counting each one as you put it inside. 2. Repeat using the larger marbles in the other glass. 3. Fill both glasses full of water. 4. Gently tip the water of one container into the beaker and note the volume. 5. Repeat for the other container. Are the volumes of the glasses the same? 

You need to work out the volume of the marbles within the glasses. Marbles are spheres, so use the volume of a sphere can be calculated: Volume = 4 / 3 x Pi x r^{3} where Pi = 3.14 and r is the radius of the sphere. You can get the radius by using vernier callipers. Dont forget your answer is a cubic measurement eg. cm^{3}. Now multiply the volume of each marble by the number of marbles used. 
The volume of a cylinder can be worked by calculating the area of the base and multiplying that number by it's height. So, the base of the cylinder is a circle, therefore the area of the circle can be worked by the following: Area = Pi x r^{2} where Pi = 3.14 and r is the radius of the circular base. Dont forget your answer is a cubic measurement eg. cm^{3}. Now just multiply this number by the height of your glass 

Working mathematically school incursion

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