Final answer:
The change in volume due to temperature change is proportional to the original volume; Block B's change in volume is four times that of Block A, and changes in cross-sectional area and height depend on thermal expansion.
Step-by-step explanation:
When answering the question regarding the change in volume due to temperature change, we must understand that the volume of a solid object is indeed calculated as the product of its length, width, and height (L x W x H). For Block A with dimensions L x 2L x L, the volume is 2L³, while Block B with dimensions 2L x 2L x 2L has a volume of 8L³. The change in volume of Block B is four times the change in volume of Block A because the original volume of Block B is four times that of Block A. As for changes in cross-sectional area and height, these will also be proportional to the original dimensions and the amount of thermal expansion the material experiences.