What are the physical properties of materials?

• Magnetism, elasticity, solubility

• Flexibility, viscosity, opacity

• Shape, size, texture

• Density, color, hardness, melting point, boiling point, electrical conductivity, thermal conductivity, tensile strength.

Name three types of materials based on their origin.

• Recyclable

• Metallic

• Natural, Synthetic, Composite

• Biodegradable

What is the difference between natural and synthetic materials?

• Natural materials are created in laboratories; synthetic materials occur naturally.

• Synthetic materials are exclusively found in nature; natural materials are artificial.

• Natural materials are always biodegradable; synthetic materials are not.

• Natural materials are sourced from nature; synthetic materials are man-made.

List two sorting techniques used for materials.

• Insertion Sort

• Merge Sort

• Selection Sort

• Bubble Sort, Quick Sort

How can you group materials based on their properties?

• According to their popularity and cost.

• Materials can be grouped by their physical, chemical, and mechanical properties.

• By their color and size only.

• Based on their age and origin.

What is a common use of metals in everyday life?

• Construction and manufacturing of everyday items.

• Fashion and clothing design

• Cooking and food preparation

• Gardening and landscaping

Which material is known for its flexibility and strength?

• Steel

• Rubber

• Glass

• Wood

What property of materials determines their ability to conduct heat?

• Thermal conductivity

• Magnetic permeability

• Electrical conductivity

• Optical transparency

How do you sort materials based on their density?

• Arrange materials in alphabetical order.

• Sort materials by their color and texture.

• Measure the density of each material and sort them by their density values.

• Group materials based on their size and shape.

What are biodegradable materials? Give an example.

• Cornstarch

• Glass bottles

• Aluminum cans

• Plastic bags