1. Chapter 13 Section 1 What is climate?
Objective:
Explain how weather and climate are related.
Identify the factors that determine climate.

2. Weather and Climate
Air temperature, the appearance of the sky, winds, and the amount of moisture in the air all are part of weather.
weather: day-to-day conditions of the atmosphere

3. Weather and Climate
climate: average weather conditions of an area over many years
Climate describes the weather patterns of an area over time.

4. DEFINE:
What is climate?

5. Average Temperatures
Average monthly and yearly temperatures can be used to describe climate.
found by adding together the daily average temperature for each day of the month and dividing by the number of days in the month

6. 2. DESCRIBE:
How do you find yearly average temperature?

7. Temperature Range
temperature range = how much the temperature changes during the year
to find, subtract the lowest monthly average temperature from the highest
example:Eureka, CA
average monthly temperature in July = 14℃
average monthly temperature in January = 9℃
temperature range: 14-9 = 5℃

8. Average Precipitation
Precipitation is:
rain
snow
sleet
hail
Average precipitation = average amount of water from rain, snow, sleet, or hail that falls in an area in a month.
measured in centimeters or inches

9. 13-1 Classwork The condition of the atmosphere today is the ___.
The ___ of an area describes the average weather conditions from year to year.
Temperature ___ describes the yearly change in temperature.
Rain and snow are two different kinds of ___.

10. 13-1 Classwork
5. CALCULATE: a. The high temperature in Chicago was 12℃. The low was 8℃. What was the temperature range that day? b. The high temperature in Houston was 25℃. The low was 21℃. What was the average temperature in Houston that day?
6. INFER: What two factors have the greatest effect on climate?