"Changes and Differences in Temperature" PPT Courseware

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"Changes and Differences in Temperature" PPT Courseware

Part I: Temperature Overview

Temperature: refers to the degree of hotness or coldness of the atmosphere, usually expressed in ℃.

1. Temperature observation

Tools: Thermometer

The temperature, which accurately reflects the weather conditions of a place, is measured using a thermometer placed in a louvered box where meteorological observation instruments are installed at a meteorological station.

The temperature is usually observed four times a day, usually at 8:00, 14:00, 20:00 and 2:00 Beijing time.

2. Average Temperature

Daily average temperature: the average of the temperature values ​​at different times of the day.

Monthly average temperature = (sum of daily average temperatures for each day of the month) ÷ number of days in the month

The monthly average temperature that reflects the climate characteristics of a place refers to the average temperature of the month for which there are local meteorological observation records and over many years.

Annual average temperature = (sum of average temperatures of each month in a year) ÷ 12

Changes and differences in temperature PPT, Part 2: Changes in temperature

1. Daily changes and daily ranges of temperature

Diurnal temperature variation: temperature variation with a cycle of one day.

Diurnal temperature range: the difference between the highest and lowest temperatures in a day.

Calculation formula:

Daily temperature range = maximum temperature - minimum temperature

2. Annual temperature changes

Annual temperature variation: temperature variation with a cycle of one year.

Annual temperature range: the difference between the highest monthly average temperature and the lowest monthly average temperature in a year.

3. Annual temperature change curve

In most places on land, the highest monthly average temperature in the Northern Hemisphere occurs in July, and in the Southern Hemisphere in January. The lowest monthly average temperature occurs in January, and in July, in the Northern Hemisphere in the Southern Hemisphere.

In order to intuitively reflect the changes in temperature in a certain place in each month, a temperature curve chart is usually drawn throughout the year. The months are marked on the horizontal line at the bottom of the chart, and there will be a scale representing the temperature on the vertical line on the left. The average temperature of each month is marked with dots, and the line connecting the points is the temperature change curve for the whole year.

Temperature changes and differences PPT, Part 3: Temperature differences

1. Isotherm diagrams are usually used to represent the horizontal distribution of temperature.

Isotherm: A line connecting points of equal temperature.

Isotherm map: A map with plotted isotherm lines.

Isotherms are closed like this. If the temperature in the center is low, it means it is a low temperature center; otherwise, it is a high temperature center.

2. Temperature distribution and influencing factors

(1) How does the temperature change from the equator to the poles? What is the reason for the change?

(2) Indicate the latitudes where the annual average temperature is above 20℃ and below -10℃ respectively.

Areas with an average annual temperature above 20°C: between the Tropic of Cancer and the Tropic of Capricorn

Areas below -10℃: within the Arctic and Antarctic Circles

Factors affecting temperature distribution:

Latitude Factor

Sea and land factors

Topographic factors

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PPT: Changes and Differences in Temperature

"Changes and Differences in Temperature" PPT Part 1 Content: Learning Objectives 1. Compare the temperature change chart, be able to simply describe the daily and annual changes in temperature, and master the method of calculating the difference 2. Based on the monthly average temperature data, be able to skillfully draw a temperature curve chart 3. Understand..

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Update Time: 2024-11-22

This template belongs to Geography courseware Business Planet Edition 7th Grade Geography Volume 1 industry PPT template

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