Unit 4 Study Guide

Front

What is the definition of absolute value?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. It is always a non-negative number.

Front

How do you calculate the temperature change when it rises and falls?

Back

To calculate the temperature change, add the increase to the initial temperature and then subtract the decrease. For example, if the temperature is -5 degrees, rises 30 degrees, and then drops 12 degrees: -5 + 30 - 12 = 13 degrees.

Front

What is the absolute value of -3?

Back

3

Front

What is the formula to find the difference between two temperatures?

Back

The difference in temperature is found by subtracting the lower temperature from the higher temperature. For example, if one temperature is 42 degrees and another is -25 degrees, the difference is 42 - (-25) = 67 degrees.

Front

What does a negative temperature indicate?

Back

A negative temperature indicates that the temperature is below zero degrees, which is often associated with cold weather.

Front

How do you represent a temperature drop on a number line?

Back

A temperature drop is represented by moving left on the number line. For example, if the temperature is 10 degrees and it drops by 5 degrees, you move from 10 to 5.

Front

What is the value of -4/5 on a number line?

Back

-4/5 is a point slightly to the left of -0.8 on the number line.

Front

If the temperature is -10 degrees and it increases by 15 degrees, what is the new temperature?

Back

The new temperature is 5 degrees, calculated as -10 + 15.

Front

What is the significance of zero on a number line?

Back

Zero is the point that separates positive numbers from negative numbers. It represents a neutral temperature.

Front

How do you find the temperature at night after a series of changes?

Back

Start with the initial temperature, add the increase, and then subtract the decrease. For example, starting at -5 degrees, rising 30 degrees, and then dropping 12 degrees results in 13 degrees.