Understanding Elevation and Temperature

This video tutorial covers Math 7 Unit 5 Lesson 1, focusing on interpreting negative numbers. It begins with an introduction to positive and negative numbers using a thermometer as a visual aid. The lesson then explores the concept of sea level and the vertical positions of animals, emphasizing the use of positive and negative numbers to represent elevation. The summary introduces the concept of absolute value, explaining how it measures the distance of a number from zero. The video concludes with homework problems that reinforce the lesson's concepts, including temperature comparisons and elevation calculations.

What is the temperature reading if the thermometer shows a point between 0 and -5, slightly more than halfway?

• -4°C

• -1°C

• -2°C

• -3°C

If a thermometer shows a temperature of 5.5°C, how can this be expressed as a fraction?

• 5 1/2

• 5 1/3

• 5 1/5

• 5 1/4

Which temperature is colder: -4°C or -3°C?

• -4°C

• Cannot be determined

• -3°C

• Both are equally cold

If a seagull is at 10 meters above sea level, what is the position of a shark at -3 meters?

• 3 meters below the seagull

• 10 meters below the seagull

• 13 meters below the seagull

• 7 meters below the seagull

How far is a mobul ray at 3 meters above the ocean from an octopus at -10 meters?

• 13 meters

• 10 meters

• 7 meters

• 15 meters

What is the absolute value of -15?

• 0

• 30

• 15

• -15

If a fish is 12 meters below the ocean surface, what is its elevation?

• -12 meters

• 24 meters

• 0 meters

• 12 meters

A seabird is 28 meters above the ocean. What is its elevation?

• -28 meters

• 56 meters

• 0 meters

• 28 meters

If a ticket costs $30 and has a 200% markup, what is the final price?

• $90

• $60

• $150

• $120

To make a bluer shade of green, how should the paint mixture be adjusted?

• Increase yellow

• Decrease yellow

• Decrease blue

• Increase blue