Question

synthetic materials are made by applying chemical processes to natural resources. one example of a synthetic material is concrete. concrete is a widely used building material. concrete is made by mixing together cement, crushed rocks, sand, and water. the cement is made from limestone and clay minerals. when the cement is mixed with crushed rocks, sand, and water, a chemical reaction occurs. the resulting substance is concrete! pouring concrete into a bucket which natural resources are used to make concrete? select all that apply. limestone water sand wood

Explanation:

The text states that cement (made from limestone and clay minerals) is mixed with crushed rocks, sand, and water to make concrete. Limestone, water, and sand are natural resources used in the process. Wood is not mentioned as a component in making concrete.

Answer:

• limestone
• water
• sand