Theyab and Hamad 3

matter from which a substance or material is made

• substances

• properties

• material

synthetic materials

• man made

• natural

• from the earth

obtained from natural materials that have undergone chemical reactions

• natural material

• synthetic material

made to fix specific functions, mimics natural materials

• food and medicines

• composites

• polymers

• ceramics

strong flexible easily modified to hold different shapes

• foods and medicines

• ceramics

• polymers

• composites

ceramics

• rayon, polyester

• cement, bone china

• nylon, acrylic

• concrete, fiberglass

flexible, can be spun

• ceramics

• polymers

• synthetic fibers

• composites

what makes up 1/3 of the Earth's freshwater

• seawater

• groundwater

• lakes

places rich in coal were_________ millions of years ago

• swamps

• oceans

How long does it take soil to form?