Glacial Till and Core Analysis

George Melle introduces the final passage of an ACT tutorial, recommending the Real ACT prep guide for practice. He explains glacial till and core analysis, focusing on resistivity and CO2 measurements. The video includes a detailed analysis of tables and questions related to till layers, resistivity, and CO2 content. The tutorial concludes with encouragement to share the video and learn more about science and the ACT test.

What resource does the instructor recommend for ACT practice tests?

• Kaplan's ACT Prep Book

• The Real ACT Prep Guide

• The Official SAT Study Guide

• Barron's ACT Study Guide

What is glacial till?

• A type of rock formation

• A well-sorted sediment

• A type of volcanic ash

• A poorly sorted sediment

What does resistivity in a core sample indicate?

• The temperature of the core

• The age of the sediment

• The color of the sediment

• The electrical property of the material

In Table 1, which particle size is the largest?

• Silt

• Sand

• Clay

• Gravel

Which till layer corresponds most closely with a sample having 31.5% sand?

• Gray D

• Gray C

• Gray B

• Gray A

According to Figure 1, which layer has the highest resistivity?

• Sand and Gravel

• Brown Till

• Gray Till A

• Olive Green Till

What is the average resistivity of bedrock similar to?

• Brown Till

• Gray Till B

• Olive Green and Gray Till

• Gray Till D

What is the CO2 content of the recently deposited sediments likely to be?

• Less than 20 mg/g

• Exactly 35 mg/g

• Between 20 and 30 mg/g

• Greater than 35 mg/g

What is the primary focus of the video tutorial?

• Learning about historical events

• Understanding glacial till and core analysis

• Improving reading comprehension

• Mathematical problem-solving

What does the instructor encourage viewers to do at the end of the session?

• Take a break

• Share the resource with friends

• Ignore the video

• Purchase more books