Grade 7 23 Synthetic materials

​Materials

​LO:Describe the properties of different materials

​Properties of materials

​1.Physical properties

2.Chemical properties

Can these properties be changed and how?

Classifying materials

​1. Natural Materials- materials from plants, animals and the ground

2.Synthetic materials- materials developed by humans through chemical reactions and processes

​Technology

​Technology- is the practical use of scientific knowledge

Synthetic materials-are developed from natural materials

synthetic materials are technology

​Synthetic materials

​1. All are made from natural resources

​2. All have gone through chemical reactions

​3. All are made to fit specific functions

​Examples of synthetic materials

​1. Plastics

2.Ceramics

3.Artifical food

4.Medicine

5.Composites

Multiple Choice

Why are trees a natural resource?

• The leaves are green

• We use them to make paper, lumber, and other products.

• They are beautiful

• They grow back after they are cut down.

Multiple Choice

Any useful material that is found in nature:

• Natural Resource

• Human Resource

• Plants

Multiple Choice

What is a resource?

• something we can take

• something we can find

• something we can use

• something we can give

Multiple Choice

Natural resources come from . . . .

• factory

• earth

• human

Multiple Choice

Examples of natural resources are . . .

• popcorn, gum, chocolate

• plants, animals, water

• pen, marker, crayon

Multiple Select

These pictures are examples of natural resources.

Multiple Choice

A bicycle is an example of natural resource.

• TRUE

• FALSE

Multiple Choice

Why are trees called natural resources? Because ….

• the leaves are green

• they are beautiful

• we use them to make things

Multiple Choice

Plastic is _____________________.

• Manmade resource

• Natural Resource

Multiple Choice

A common synthetic material that is found almost everywhere is ________.

• Coal

• Lumber

• Plastic

• Aerogel

Multiple Choice

_______ is an example of a synthetic fabric.

• Wool

• Silk

• Cotton

• Nylon

Multiple Choice

Synthetic materials are made by _________.

• aliens

• humans

• farmers

• nature

Multiple Choice

What are synthetic materials mostly made from?

• Coal

• Chemicals

• Trees

• Gasoline

Multiple Choice

What word means "manufactured in a lab or chemical plant"?

• macromolecular

• alloy

• synthetic

• ceramic

Multiple Choice

Which word is a synonym for synthetic?

• real

• artificial

• natural

• true

Multiple Choice

True or False: Synthetic materials are never made from natural resources

• True

• False

Multiple Choice

What is a synthetic material?

• Any material that is man made

• Any material that is only made from natural resources

• Any material that is made of recycled materials

• Any material that is found in nature.

Multiple Choice

When two substances combine to form a new substance, a _____ has occurred.

• chemical reaction

• physical reaction

• mixture

• solution

Multiple Choice

To change from natural to synthetic, substances must undergo a ____________ change.

• Chemical

• Physical

• Flammable

• Density

Multiple Choice

Materials made from one or more natural substances that undergo a chemical process

• Renewable

• Natural Resources

• Chemical property

• Synthetic Materials