Which of the following materials is useful for making molds because it has a low melting point?
1. wood
2. metal
3. clay
4. wax
Wax
The material that is useful for making molds because it has a low melting point is wax.
To arrive at this answer, we need to understand the properties of the different materials listed and consider their melting points.
1. Wood: Wood is not suitable for making molds with a low melting point as it is a solid material and does not melt easily. Wood is typically used for construction and crafting purposes, but it cannot be easily molded by melting.
2. Metal: Metals have high melting points and, therefore, are not suitable for making molds with a low melting point. Metals such as iron, aluminum, and copper require extreme temperatures to melt, making them not practical for this purpose.
3. Clay: While clay can be molded by hand or sculpted to create shapes, it also requires high temperatures to harden and set. It is not suitable for creating molds with a low melting point.
4. Wax: Wax is a material with a low melting point, typically ranging from 40 to 100 degrees Celsius (104 to 212 degrees Fahrenheit). This property makes it an excellent choice for making molds. It can be melted easily and poured into a mold to form different shapes, and then hardens as it cools down.
In conclusion, of the materials listed, wax is the most suitable for making molds because it has a low melting point.