Give at least 5 example each of porous material and non porous material
The Correct Answer and Explanation is:
Porous Materials (at least 5 examples):
- Sponge
- Wood
- Clay brick
- Paper towel
- Pumice stone
Non-Porous Materials (at least 5 examples):
- Glass
- Stainless steel
- Plastic
- Glazed ceramic
- Marble
Explanation
Materials can be grouped based on their ability to absorb liquids or gases. This property depends on whether the material contains tiny holes or spaces known as pores.
Porous materials have many small openings that allow substances like water, air, or oil to pass through or be absorbed. The pores in these materials can be visible or microscopic. For instance, a sponge is filled with visible pores that soak up liquid quickly. Wood contains natural grain patterns and fibers that make it capable of absorbing moisture. Clay bricks are widely used in construction because they can regulate temperature and moisture through their pores. A paper towel is designed with microscopic pores to soak up spills efficiently. Pumice stone, formed from volcanic activity, has so many air pockets that it can even float on water.
On the other hand, non-porous materials do not allow liquid or air to pass through them. Their surfaces are smooth and sealed, preventing absorption. Glass is often used in containers and windows because it resists water and air penetration. Stainless steel is common in kitchens and hospitals where hygiene is important since it does not absorb contaminants. Plastic is used in packaging and containers because it keeps moisture and air out. Glazed ceramic has a shiny surface coating that seals its pores, making it water-resistant. Marble, although a natural stone, is dense and typically treated to be non-porous for countertops and flooring.
Understanding the difference between porous and non-porous materials is crucial in everyday life. It helps determine the right materials for cleaning, construction, storage, and sanitation. Porous materials are often breathable and absorbent, while non-porous ones are ideal where moisture resistance and cleanliness are essential.
