At the time, she was searching for a way to make a material strong enough to use on automobile tires.

VOA: special.2010.02.09

Obsidian is a kind of black glass formed when the heat of a volcano melts the silica material in sand.

VOA: special.2009.09.16

This is the idea that a patentshould be given to a machine or something that creates a material change, like a chemical process.

VOA: special.2010.07.16

The American soldier was said to be like galvanized iron, a material produced for special strength.

VOA: special.2010.03.07

Portland cement is a material that holds together the sand and crushed stone in concrete.

VOA: special.2009.12.01

Vermiculite is a material that can hold air, water and nutrients.

VOA: special.2011.04.26

To make one, clay is mixed with a material that burns.

VOA: special.2009.06.22

He tested the cement, and says less could be used because the rice hull ash makes it a stronger building material.

VOA: special.2009.12.01

The Agriculture Department has a soybean germplasm collection, a collection of genetic material passed from one generation to the next.

VOA: special.2009.01.20

One such material is asphalt, a substance often placed on top of buildings and used to cover road surfaces.

VOA: special.2010.03.02

The book says the saying began because a competitor's face was cleaned with a cloth towel or other material.

VOA: special.2010.11.21

A farmer could save on wood or stone with a round design that needed less material than traditional barns.

VOA: special.2009.12.29

He and a team of researchers there have built a house made out of straw bale and hemp material.

VOA: special.2009.10.05

Knitting is a way of creating clothing by looping together long thin pieces of material such as cotton or wool.

VOA: special.2009.04.08