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! which natural resources are used to make concrete? select all that apply. wood water limestone sand

Explanation:

The text states that concrete is made by mixing cement (from limestone and clay minerals), crushed rocks, sand, and water. Wood is not mentioned as an ingredient.

Answer:

B. water, C. limestone, D. sand