Test: The World of Things - Class 3 MCQ

Transparent materials are those through which you can see clearly. Glass windows are a common example of transparent materials. This property allows light to pass through them without significant distortion, making them ideal for visibility and clarity.

Solids are materials that maintain their shape and do not flow. Examples include wood and metal. Their particles are closely packed together, giving them a fixed shape and volume.

Translucent materials allow some light to pass through them, but not clearly. Examples include frosted glass and thin plastic. They scatter the light passing through them, making objects on the other side appear blurred.

Liquids are materials that take the shape of their container and flow. Water and milk are common examples of liquids. They do not have a fixed shape but instead conform to the shape of the container they are in.

Natural materials are those that occur in nature without human intervention, such as trees and rocks. In contrast, artificial materials are manufactured by humans, like plastic toys and metal tools. Understanding this difference helps us appreciate the resources around us.

Flexible materials can be bent easily without breaking. Examples include fabric and rubber. This property enables them to be shaped or deformed without permanently altering their structure.

Opaque materials do not allow light to pass through them, making them impossible to see through. Wood and metal are common examples of opaque materials due to their dense structure that blocks light transmission.

Liquids are materials that take the shape of their container and flow. This property allows them to adapt to the space they occupy, making them versatile for various applications such as drinking, cooking, and cleaning.

Rigid materials are hard and do not bend easily. Examples include wood and metal. Their strong molecular structure resists deformation, making them suitable for applications requiring stability and support.

Gases are materials that spread out and fill the space they are in. Air and helium are common examples of gases. Their particles move freely, allowing them to occupy the entire volume of a container they are in.