Is full cream pure? in Is Matter Pure – Class 9 Science Experiment
Chapter Name: Is Matter Pure
Activity Name: Is full cream pure? in Is Matter Pure
Activity Description:
In this experiment, we will investigate whether full cream milk is a pure substance or a mixture.
By using a milk churner to spin the milk, we will observe the separation of a paste-like solid known as cream. Based on this observation, we will determine if the cream is a pure substance or a mixture.
Required Items:
- Milk
- Milk churner
- Vessel
Step by Step Procedure:
- Take some milk in a vessel.
- Use the milk churner to spin the milk for some time (refer to figure 1).
- Observe the changes in the milk after spinning.
- Note the separation of a paste-like solid (cream) from the milk.
Experiment Observations:
After spinning the milk, a paste-like solid (cream) separates from the milk.
Precautions:
- Ensure that the milk churner and vessel are clean and free from any contaminants.
- Handle the milk churner and vessel carefully to avoid spillage.
- Conduct the experiment in a controlled environment to avoid external factors influencing the results.
Lesson Learnt from Experiment:
The observation of cream separating from the milk indicates that full cream milk is a mixture and not a pure substance. Cream is composed of more than one component, making it a mixture. This experiment highlights the concept of mixtures and their presence in everyday substances.
