isostacy

Earth and Life Isostacy Name: ______________ Virtual Exercise: Isostacy. You have two types of wood in front of you. The dark brown samples are a hard wood (Brazilian Oak) and the light colored pieces are pine. Calculate the densities of each by measuring the volume (L x W x H) and weighing the sample. Density equal mass/volume (gm/cm 3 ). Sample ID Mass Volume Specific Gravity (Density) Pine 41.84g 130cm 3 0.32 Flooring sample 82.17g 90cm ________ Double Pine ________ ________ ________ Double Flooring sample ________ ________ ________ Given the density of water (a fact that you should know), how far into water will each piece or pieces of wood sink? Pine ________________________________ (use mm) Flooring sample ________________________________ (use mm) 2. Measure how much wood is submerged (mm). A trick is to put the block in carefully and then pull it out and measure the water line. Measure how much of each piece was submerged in the water. Then calculate the fraction of submerged wood/thickness Sample ID Submerged Total Thickness Fraction submerged (how much below the surface) Pine ________ ________ ________ Flooring sample ________ ________ ________ Stacked Pine sample ________ ________ ________ Stacked flooring sample ________ ________ ________ Did your prediction in Part 1 match your measurements? Did fraction submerged vary when the wood pieces were doubled in thickness? Why or why not?