1. Here are five thermometers. The first four thermometers show temperatures in degrees Celsius . Write the temperatures in the blanks.

   

   Five vertical thermometers, a through e. Thermometer a is shaded up to 1. Thermometer b is shaded up to 2. Thermometer c is shaded up to the halfway point between 3 and 4. Thermometer d is shaded to the halway point between negative 1 and 0. Thermometer has tick marks labeled negative 20, blank, blank, negative 5, blank, blank, ten, blank, blank, 25.

2. The last thermometer is missing some numbers. Write them in the boxes.

3. Elena says that the thermometer shown here reads because the line is above . Jada says that it is . Do you agree with either of them? Explain your reasoning.

   

Your teacher will give you a sheet of tracing paper. Follow the steps to make your own number line.

• Use a straightedge or a ruler to draw a horizontal line. Mark the middle point of the line, and label it 0.
• To the right of 0, draw tick marks that are 1 centimeter apart. Label the tick marks 1, 2, 3, . . . , 10. This represents the positive side of your number line.
• Fold your paper so that a vertical crease goes through 0 and the two sides of the number line match up perfectly.
• Use the fold to help you trace the tick marks that you already drew onto the opposite side of the number line. Unfold and label the tick marks -1, -2, -3. . . -10. This represents the negative side of your number line.

1. Use your number line to answer these questions:

   1. Which number is the same distance away from 0 as is the number 4?
   2. Which number is the same distance away from 0 as is the number -7?
   3. Two numbers that are the same distance from 0 on the number line are called opposites. Find another pair of opposites on the number line.
   4. Choose a positive number and a negative number that is each farther away from 0 than is the number 5.
   5. Choose a positive number and a negative number that is each farther away from 0 than is the number -2.

   Pause here so your teacher can review your work.

2. Here is a number line with some points labeled with letters. What are the locations of points , , and ? Be prepared to explain or show your reasoning.