| − | '''Sand''' is made of [[silicon dioxide]] and can be found on beaches at coastlines throughout the world. Kids love to play in sand, and it makes a soft enough surface to lie down on while sunbathing. Wet sand can be used to make a sandcastle. | + | '''Sand''' is made of [[silicon dioxide]] and can be found on beaches at coastlines throughout the world. Kids love to play in sand, and it makes a soft enough surface to lie down on while sunbathing. Wet sand can be used to make a sandcastle. Another use for sand is to make glass by melting sand. |