John's Elevation Changes and Concepts

The video tutorial by Rob Mob discusses elevation and the use of positive and negative numbers to evaluate elevation above and below sea level. It uses a vertical number line to model elevation changes as John walks home, starting at 100 feet above sea level. The tutorial calculates elevations at various points (A, B, C) and finally at John's house, demonstrating how to use equations to determine changes in elevation, including increases and decreases, resulting in a final elevation of 500 feet below sea level.

What is the reference point used to determine if an elevation is positive or negative?

• Sea level

• Ground level

• Mountain peak

• Skyline

If John starts at 100 feet above sea level and moves to Point A, which is 200 feet higher, what is his new elevation?

• 400 feet

• 200 feet

• 100 feet

• 300 feet

How much does John descend when moving from Point A to Point B?

• 500 feet

• 200 feet

• 300 feet

• 400 feet

What is John's elevation at Point B?

• 100 feet above sea level

• 200 feet below sea level

• 500 feet below sea level

• 300 feet above sea level

From Point B, John ascends 700 feet. What is his elevation at Point C?

• 900 feet above sea level

• 700 feet above sea level

• 500 feet above sea level

• 200 feet above sea level

What is the starting elevation for John's journey from Point C to his house?

• 700 feet above sea level

• 300 feet above sea level

• 200 feet below sea level

• 500 feet above sea level

How much does John descend when moving from Point C to his house?

• 1000 feet

• 700 feet

• 500 feet

• 900 feet

What is John's final elevation at his house?

• 700 feet below sea level

• 500 feet below sea level

• 300 feet below sea level

• 200 feet below sea level

What is the total change in elevation from John's starting point to his house?

• 1000 feet

• 800 feet

• 1200 feet

• 600 feet

What is the significance of a negative elevation value?

• Above ground level

• At sea level

• Below sea level

• Above sea level