I. Man gets information about earth from rocks. II. Man gets metals from rocks and makes them into jewelry. III. Man uses rocks for building roads and bridges.
no
Normally using a crusher.
Obsidian is an igneous rock. Rocks are not man-made. Man-made substances that are similar to rock include concrete and cement.
Engineering problems associated with metamorphic rocks include their variable composition and hardness, which can make them difficult to predict and work with. Metamorphic rocks can also have foliation and bedding planes, which may impact stability in construction projects. Additionally, their response to stress and pressure can lead to deformation or fracturing, affecting the durability of structures built with them.
I. Man gets information about earth from rocks. II. Man gets metals from rocks and makes them into jewelry. III. Man uses rocks for building roads and bridges.
Rocks aren't man-made.
by rocks
The rocks probably symbolize problems that cause restlessness and loss of sleep.
destroy
no
Yes they are man made..
It wears away at rocks and monuements. :(
with two rocks
by mining
Bricks and concrete are man-made rocks.
thats shuffle bot he rocks man