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Name:________________________________________ Period:_________ Finding the Density Between Intrusive and Extrusive Rocks Purpose: To determine the specific density between 4 types of igneous rocks; intrusive granite and diorite, and extrusive andesite and basalt. Research: Intrusive rock is rock formed from magma below the Earth’s surface or inside the Earth; they are also called magmatic or plutonic rock. Extrusive rock is rock formed by lava near or on the Earth’s surface or exiting the Earth; they are also called volcanic rock. Density = __ mass(g)___ volume(cm3) measuring mass – weight in grams(g) measuring volume - 1cm3 = 1ml Hypothesis: From what I know about intrusive and extrusive rock, ________________________________ _______________________________________________________________________________ _______________________________________________________________________________ Materials: worksheet, electronic scale, graduated cylinder, pie pan tray, water, displacement container, 8 rock samples(2 of each), paper or plastic cup, and calculator. Procedures: Obtain all materials. Identify the rock samples. Then using the scale, weigh each rock sample and record the mass; make sure to be accurate to the tenths (00.0g). Place the the displacement container in the pan and the cup under the flow port to capture the H2O overflow. Fill up the displacement container with H2O until the H2O begins to drip out of the flow port. Pour out the H2O in the cup. Drop a rock sample in the displacement container and capture the displaced H2O into the cup. Measure the displaced H2O by pouring the H2O from the cup into the graduated cylinder. Record the volume in cm3. Repeat for each sample. Calculate the density for each sample by using the formula g/cm3. Results: granite#1 granite#2 diorite#1 diorite#2 andesite#1 andesite#2 basalt#1 basalt#2 Mass: _______ ________ ________ ________ _________ __________ ________ ________ Volume: ________ __________ ________ _________ __________ __________ ________ ________ Density: granite #1 _________________ g/cm3 diorite #1 _________________ g/cm3 andesite #1 _________________ g/cm3 basalt #1 _________________ g/cm3 granite #2 _________________ g/cm3 diorite #2 _________________ g/cm3 andesite #2 _________________ g/cm3 basalt #2 _________________ g/cm3 Analysis & Conclusion: (Remember to answer your hypothesis.) You may also use the back of the paper for additional analysis and conclusion comments.