## Altitude and Temperature

**Work Time**

# Altitude and Temperature

Jack flew from Beijing to San Francisco. As the plane took off and climbed, he noticed that both the height of the airplane and the outside air temperature were displayed on a TV monitor.

Jack wrote down some of the data.

- Assume that the temperature continued to decrease at the same rate.
- At what height did the outside air temperature reach 0°C?
- Write an equation relating the temperature of the air to the height of the plane
*h*. - What was the temperature at a height of 30,000 feet?

- Jack wrote $16+30\left(-2\right)$$\mathrm{30,000}$. Explain how this expression relates to the temperature at 30,000 feet.
- The airplane changed height and the temperature dropped by 10 degrees. Jack wanted to know how much the height of the plane had changed.
- Explain why the answer can be found by calculating $[-10\xf7(-2\left)\right]\cdot \mathrm{1,000}$
- Explain why the answer can be found by calculating $[10\xf72]\cdot \mathrm{1,000}$