Properties and Uses of Materials

The video explains why greenhouses are made of glass, highlighting glass's transparency. It discusses how materials are grouped by properties like transparency and texture. The video compares materials such as wool, sandpaper, steel, and rubber, focusing on their properties. It emphasizes the importance of selecting appropriate materials for specific uses, like using steel for bridges due to its strength. Finally, it explains how material properties determine their applications, such as using waterproof materials for umbrellas and porous materials for towels.

What is the primary reason for using glass in greenhouses?

• It is a waterproof material.

• It is a flexible material.

• It is a transparent material.

• It is a strong material.

Which of the following materials is also considered transparent like glass?

• Water

• Wood

• Metal

• Rubber

What property of wool differentiates it from glass?

• Wool is rigid.

• Wool is soft.

• Wool is hard.

• Wool is transparent.

Which material is described as strong, hard, and rigid?

• Rubber

• Steel

• Wool

• Sandpaper

Why would steel be chosen over rubber for building a bridge?

• Steel is more flexible.

• Steel is softer.

• Steel is stronger and more rigid.

• Steel is more porous.

What type of material is typically used to make umbrellas?

• Porous material

• Waterproof material

• Transparent material

• Flexible material

Which property is essential for materials used in towels?

• Rigid

• Porous

• Transparent

• Waterproof