1. Collect the necessary materials:

* Irregular object

* Water

* Graduated cylinder (or another container with marked volume measurements)

* Scale

* Calculator

2. Measure the irregular object's mass:

* Place the irregular object on the scale and record its mass in grams (g).

3. Fill a graduated cylinder with water:

* Fill the graduated cylinder with water until it reaches a certain volume level, such as 50 milliliters (mL). Record this initial water level.

4. Immerse the irregular object in the water:

* Gently place the irregular object into the graduated cylinder containing water. The object should be completely submerged, but not touching the bottom or sides of the cylinder.

5. Note the new water level:

* Observe the new water level in the graduated cylinder after the irregular object has been immersed. Record this final water level in mL.

6. Calculate the volume of the irregular object:

* The volume of the irregular object is equal to the difference between the final water level and the initial water level.

Volume of the irregular object = Final water level - Initial water level

7. Calculate the density of the irregular object:

* Density is defined as mass per unit volume.

Formula: Density = Mass of object / Volume of object

* Substitute the mass of the irregular object (in grams) and the volume of the irregular object (in milliliters) into the formula to calculate its density.

The density will be expressed in grams per milliliter (g/mL).

Example:

1. Mass of irregular object = 20 grams

2. Initial water level = 50 milliliters

3. Final water level = 75 milliliters

4. Volume of irregular object = 75 mL - 50 mL = 25 mL

5. Density of irregular object = 20 g / 25 mL = 0.8 g/mL

Therefore, the density of the irregular object is 0.8 grams per milliliter.