1. How is the relative humidity of the air affected by warming it? Explain.
2. How does the white cloud of steam seen about a locomotive in cold weather differ from fog? Explain.
3. In cold weather is the relative humidity of air out of doors and indoors the same? Explain.
4. Compare the relative humidity of air in a desert and near the ocean.
5. Look up the derivation of the term "hygrometer." Give the use of the instrument.
6. Find the relative humidity of air at 20°C. if its dew point is at 10°C.
7. How may the relative humidity of the air in a home be increased?
8. What is the effect of high humidity in the summer upon human beings? How do you explain this?
9. Does dew fall? Explain how dew is formed?
10. In what respects is a cloud similar to a fog? In what respects different?