8 ​th​ Grade Science: Week 2 April 13 ​th Evidence of Earth’s Interior - Review How are scientists able to study the Earth’s interior without actually seeing it? Geologists use evidence from...

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8 ​th​ Grade Science: Week 2 April 13 ​th Evidence of Earth’s Interior - Review How are scientists able to study the Earth’s interior without actually seeing it? Geologists use evidence from ​earthquakes ​! When earthquakes occur they produce seismic waves ​. Geologists measure the seismic waves using a science tool called a ​seismograph. ​The ​x-axis ​ tells how long the wave will last. The two types of seismic waves that travel through the interior of Earth are ​p waves and s waves ​. The paths of p and s waves reveal areas inside Earth where the material changes from one state of matter to another. 1 8 ​th​ grade Science Week 2 Because of seismic wave evidence, geologists know that Earth is made up of 3 main layers: ​crust, mantle, core ​. These layers vary in size, pressure, temperature, and composition​. Pearson, 2019 Pearson, 2019 2 8 ​th​ Grade Science: Week 2 April 13 ​th Evidence of Earth’s Interior - Activity In this review activity, there are 4 seismographs at different locations on Earth (A, B, C, and D). An earthquake has occurred near location A and measured by seismographs at the different locations. Part 1 - Analyze and interpret data from seismographs. Directions: ​Match ​each ​ seismic record to its seismograph location. 8 ​th​ grade Science Week 2 3 Part 2 - Develop a model of Earth’s interior and show the path of seismic waves in Earth’s interior. Directions: ​Complete steps 1 - 2. Step 1.​ ​Label the layers of the Earth:​ ​mantle, crust, inner core, outer core ​. Step 2.​ Use the key below to draw the path of the ​p​ and ​s ​ waves ​ from the earthquake to each of the 4 seismograph locations. ​* ​Hint: refer to the diagram on page 1 of this lesson for help 4 8.Math.Week2 Grade8.SocialStudies.Week2 Grade 8.ELA.Week 2 8thSciencewk2 8thSciencewk2_answers