From the size shown in your picture (See Related Link), they may be possibly be an old style of outside window shutters. They could have also divided an area of a room possibly--I can't see if they have braces or a way to attach them.
a gold sphere
you mean from wooden to plastic? it's cheaper to make in plastic
Plastic patio benches are more weather resistant than wooden ones. Wooden can rot. Plastic won't deteriorate in any weather.
wooden
It depends on your specific needs. Plastic pallets are durable, resistant to moisture and chemicals, and generally have a longer lifespan. Wooden pallets are usually less expensive, environmentally friendly, and can be repaired more easily. Consider factors like cost, sustainability, weight capacity, and the industry requirements before deciding.
Many of the wooden pallets are treated with industrial pesticides. This is a concern for many. This is one reason why plastic pallets are beneficial as compared with wooden ones; they aren't treated with insecticides. Also Wooden pallets are often constructed out of wood that has lots of spliters. Caution must be used when handling them. This is another benefit of plastic pallets over wooden pallets-no spliters. A plastic pallet is water proof compared to a wooden one. In adddition, a plastic pallet generally lasts about 2 to 3 years longer than wooden pallet.
wood
A rectangle wooden object is much heavier so it has a low density. The square wooden object is lighter so it has a high densityThe shape has no effect on the density of two objects made of the same material.One has more of the wood than the other.
The oboe is made of ebony. Most oboes are wooden, but some are black plastic. Wooden oboes cost up to double the amount of plastic ones.
One major benefit over plastic shades is the wooden ones are far less likely to warp or fade with the heat of the sunshine on them. Wooden shades also keep out more light because they are not translucent like plastic shades.
Plastic
wooden by far is the best...you get such a better beat with them.