Identify the substance represented by the above labels A-C

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied