Author Question: An order has arrived that the original cube must be broken down into eight cubic pieces of marble, ... (Read 62 times)

faduma · **on:** Jul 16, 2018

An order has arrived that the original cube must be broken down into eight cubic pieces of marble, all of the same dimension of 6 square feet per cube. What is the total surface area of the marble now?

A stonemason has shaped a block of marble into a perfect cube with dimensions of 2 feet by 2 feet by 2 feet.
What will be an ideal response?

Question 2

Thermal expansion and thermal contraction are two processes where the presence of heat will weather a rock, breaking it into smaller pieces. In which category of weathering would you expect to find thermal expansion and contraction? Why?

What will be an ideal response?

ghepp · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Answer: The cube has now been broken into eight smaller cubes with the dimensions 1 foot by 1 foot by 1 ft, equaling a total surface area of 6 square feet per cube; 8 times 6 square feet equals 48 square feet. So the surface area is increasing.

Answer to Question 2

Answer: Mechanical weathering because the rock is being broken down, but not chemically altered.