It is man made. The basic ingredients are limestone and clay which are roasted in a kiln.
Although put together by humans, the parts of cement are natural. Cement is a fine, soft, powdery-type substance. It is made from a mixture of natural rocks: limestone, clay, sand and/or shale. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.
natural habitats occur naturally whereas man made habitats are made with the use of abiotic components for example cement,plaster of paris etc
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.
Rubber is man-made but has natural agents.
It is man made
Although put together by humans, the parts of cement are natural. Cement is a fine, soft, powdery-type substance. It is made from a mixture of natural rocks: limestone, clay, sand and/or shale. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.
Sidewalks are made of concrete, which is not a rock. Concrete is a man-made construction material composed of Portland cement, various crushed rocks, sand and water.
natural habitats occur naturally whereas man made habitats are made with the use of abiotic components for example cement,plaster of paris etc
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.
natural feature
Is limestone natural or man made
Portland Head Light
Man-made and Natural Resources
it is all natural
Rubber is man-made but has natural agents.