Technology Interactions ‹ Chapter Title Copyright © Glencoe/McGraw-Hill A Division of The McGraw-Hill Companies, Inc. Technology Interactions Humans have.

Technology Interactions ‹ Chapter Title Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Technology InteractionsTechnology Interactions

Humans have always experimented with improving materials.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Materials science is the study of the properties and applications of materials.

Materials science is important in many engineering fields, including electronic, aerospace, mechanical, and structural engineering.

What Is Materials Science?What Is Materials Science?

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

MatterMatterMatter is anything that occupies space and has mass.

Atoms are the building blocks of matter.

Matter made from only one kind of atom is called an element.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

MatterMatterForms of matter

♦ Solids have definite size, shape, and volume.

♦ Liquids have definite volume but take the shape of their container.

♦ Gases have no shape or volume of their own.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Material PropertiesMaterial PropertiesA material property describes how a material reacts under certain conditions.

Materials can have many kinds of properties.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

DuctilityDuctilityDuctility is the ability to be formed and reformed.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

HardnessHardnessHardness is the ability to resist denting and scratching.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

ElasticityElasticityElasticity is the ability to return to original shape after being pulled or pushed.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

ConductivityConductivityConductivity is the ability to allow the flow of heat or electricity.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

StrengthStrengthStrength is the ability to resist forces such as compression and tension.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Classification of MaterialsClassification of MaterialsMetals

♦ Ferrous (containing iron)

♦ Nonferrous (no iron)

Ceramics (made from minerals)

Polymers (chains of molecules)

♦ Natural

♦ Synthetic

Composites

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Using Materials ScienceUsing Materials ScienceMaterials scientists and engineers are constantly experimenting and improving materials.

Diamonds are nature’s hardest material but are rare and expensive. Synthetic diamonds were engineered for use in many industrial applications.

The emerging field of nanotechnology applies materials science at the molecular or atomic level.

Technology Interactions Chapter 4 Materials Science Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Managing Material ResourcesManaging Material Resources

Most industrial materials come from the earth as natural resources.

Natural resources are either renewable or nonrenewable.

♦ Renewable resources, such as trees, can be regrown or replaced.

♦ Nonrenewable resources, such as oil or coal, are limited and will eventually run out.