Understanding Rock Characteristics

Understanding Rock Characteristics

Understanding Rock Characteristics 1.9

Warm-Up Many years ago, an entire city in Italy was found buried. Ancient cities are often buried over time, so this isnt always unusual. What was strange

about this city is that much of it was buried by solid rock, not dirt. Also strange was the fact that people were found inside their houses in this buried city. What do you think might have

happened in this city? Looking at Rock Evidence from a Mysterious City

Think Pair Share What do you think happened in this mysterious city?

Geologists put the story together using EVIDENCE After this discovery, geologists and other

scientists wondered what destroyed this city. To understand what happened, they had to put together many pieces of evidenceabout the rocks and other geologic features in the areain

order to make an argument. So what happened? Discuss with your shoulder partner what

you think happened using the provided evidence. How geologists figured it out

After studying the characteristics of the rock carefully, both in the rock formations, in the remains, and around the city, geologists were able to claim that the city was destroyed by a sudden volcanic eruption.

In fact, there was so much evidence recorded in the rocks that geologists were able to confidently record the events of that day in 79 AD, hour-by-hour!

Observing and Discussing the Characteristics of Sedimentary, Metamorphic, and Igneous Rock Guiding Question:

How do rocks record evidence of how theyve formed and changed over time? Todays Activity

Like the geologists that studied the rocks in Pompeii, you are going make careful observations of rocks. Practicing this skill today will help you solve the

Grand Canyon Mystery, which you will work on in a later class Mineral

Smaller piece of matter from which rocks are made. Common characteristics

Common characteristics are characteristics that you observe in some or all of the samples of ONE particular rock type.

Volunteer Time! Rock Characteristic Sheet Groups will discuss their observations of the four

sedimentary rocks first. Group members should agree on one common characteristic about which they feel most confident. One group member will then record this on the

student sheet. Remember that you can refer back to your Rock Type Cards to help you resolve any disagreements.

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