Do the objects denser than water float in it ? in Floating bodies – Class 9 Science Experiment

Chapter Name: Floating bodies

Activity Name: Do the objects denser than water float in it ? in Floating bodies

Activity Description:

In this experiment, the goal is to determine whether various small objects, denser than water, float or sink when placed in a glass of water. The experiment aims to understand the concept of buoyancy and how it applies to objects with different densities.

Required Items:

  • Small objects with different densities (e.g., plastic, metal, wood, cork, etc.)
  • A glass of water
  • Table 1: Values of relative densities for reference
  • Table 3: Record for observations

Step by Step Procedure:

  1. Gather small objects of different materials.
  2. Fill a glass with water.
  3. Take one object at a time and carefully place it on the surface of the water in the glass.
  4. Observe and record whether the object sinks or floats in Table 3.
  5. Consult Table 1 for the values of relative densities to understand the relationship between the object’s density and its behavior in water.

Experiment Observations:

Record the observations for each object in Table 3, noting whether they sink or float in water.

Do the objects denser than water float in it ? in Floating bodies - Class 9 Science Experiment


  1. Handle the objects and the glass of water with care to avoid any accidents.
  2. Ensure that the glass is clean and free from any contaminants.
  3. Make sure the objects are dry before placing them in the water.
  4. Take note of any irregular shapes or air bubbles that may affect the observations.

Lesson Learnt from Experiment:

This experiment helps to understand the concept of buoyancy and why some objects float in water despite being denser than water. It also highlights the significance of an object’s shape and volume in determining its buoyant behavior.

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