Understanding Positive and Negative Quantities in the Real World

This lesson explores the relationship between positive and negative quantities using real-world examples. It covers concepts like number lines, elevation, temperature, and bank account balances to illustrate how numbers can be positive or negative. The lesson emphasizes that numbers extend infinitely in both directions from zero and provides practical examples to clarify these concepts.

What is a common misunderstanding about the number line?

• Numbers only go in one direction.

• Zero is the highest number.

• Zero is the lowest number.

• Numbers do not extend beyond zero.

How is elevation above sea level represented?

• As a negative number

• As a positive number

• As zero

• As a fraction

What does 0 degrees Celsius represent?

• Boiling point of water

• Freezing point of water

• Room temperature

• Absolute zero

What happens to your bank account balance when you deposit money?

• It decreases.

• It remains zero.

• It becomes positive.

• It becomes negative.

What is it called when you owe money to the bank?

• Surplus

• Investment

• Credit

• Debt