The sand in the two arms moves faster than the sand in the center.

VOA: special.2010.01.04

But you must be careful. It is easy to get lost in the waves of moving sand especially during sandstorms.

VOA: special.2010.01.04

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

For example, you can add sand to prevent tiny breaks or lines from forming in the finished product.

VOA: special.2009.09.14

Water in the sand between the two pots evaporates through the surface of the larger pot, where drier outside air is moving.

VOA: special.2009.02.09

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

VOA: special.2009.12.01

Many of the animals that live in the sand dunes have become white.

VOA: special.2010.01.04

Driven by strong winds, the sand moves and covers everything in its path.

VOA: special.2010.01.04

It is one of the largest sand dune fields in the United States.

VOA: special.2010.01.04

So it is difficult to see the animals in the sand.

VOA: special.2010.01.04

So it is rarely found in the form of sand dunes.

VOA: special.2010.01.04

Prime Minister Brown was blunt. "Confronted with the serial deception of many years, the international community has no choice today but to draw a line in the sand,".

VOA: standard.2009.09.25

Standing outside the Pentagon Monday in front of one of the hulking desert sand colored new vehicles designed to protect against those bombs, Assistant Secretary Carter extolled the M-ATV's virtues.

VOA: standard.2009.11.02

In the report, called "Heads in the Sand", the group says a serious decline in the supply of oil coupled with increasing demand and few new projects planned, means the world needs to move away from oil.

VOA: standard.2009.10.20