It made the ice thin. If he stepped there, he might break through the ice into a pool of water.

VOA: special.2010.05.01

Clouds with extremely cool water are mixed with man-made ice crystals, such as silver iodide and metaldehyde crystals.

VOA: special.2011.01.11

The water under the ice is very salty and contains many kinds of minerals including iron.

VOA: special.2009.06.03

Ice cold water travels down the mountains and forms several rivers the Gila River, the Green River, the Little Colorado, the San Juan, the Virgin and the Gunnison rivers.

VOA: special.2009.08.12

The ice broke and John sank under the water.

VOA: special.2010.06.26

But the snow does melt. Ice cold water travels down the mountains and forms several rivers -- the Gila River,the Green River, the Little Colorado,the San Juan, the Virgin and the Gunnison Rivers.

VOA: special.2010.10.27

Warmer temperatures cause water to expand,a phenomenon called thermal expansion, and cause glaciers and polar ice caps to melt.

VOA: standard.2009.11.09