Name one common type of material used for concrete forms.

Plywood is a common choice for concrete forms due to its combination of strength, availability, and cost-effectiveness. It can be easily cut and customized to create various shapes and sizes required for different construction projects. Plywood also has a good strength-to-weight ratio, allowing it to hold the weight of wet concrete without significant deformation. Additionally, it can handle the moisture from the concrete curing process without losing structural integrity, making it ideal for this purpose.

While other materials, such as plastic and metal, can also be used for concrete forms, plywood remains a preferred option, especially for many residential and commercial applications. Cardboard is less frequently used as a form material due to its inability to withstand moisture and weight, particularly in wet concrete applications.