Question 30
Densities of irregular objects
In this investigation, you will calculate the densities of irregular objects.
You will need: a balance, measuring cylinders of various sizes, water, a calculator, small irregular objects that will sink in water and will fit inside the measuring cylinders.
Safety: Do not drop heavy objects into glass measuring cylinders; either use a plastic measuring cylinder, or hold the glass measuring cylinder at an angle, so that the object slides down slowly.
Method
1 Measure the mass of each object in grams. Remember to check that the balance is reading 0.0 g before you place the object on the balance.
2 Use the displacement method to calculate the volumes of your objects in cm³.
3 Calculate the density of each object using the volumes and masses that you measured.
4 Record your results in a table.
In this investigation, you will calculate the densities of irregular objects.
You will need: a balance, measuring cylinders of various sizes, water, a calculator, small irregular objects that will sink in water and will fit inside the measuring cylinders.
Safety: Do not drop heavy objects into glass measuring cylinders; either use a plastic measuring cylinder, or hold the glass measuring cylinder at an angle, so that the object slides down slowly.
Method
1 Measure the mass of each object in grams. Remember to check that the balance is reading 0.0 g before you place the object on the balance.
2 Use the displacement method to calculate the volumes of your objects in cm³.
3 Calculate the density of each object using the volumes and masses that you measured.
4 Record your results in a table.
