"Talk about Water Saving from Data" PPT courseware on data collection, organization and description

Description

"Talk about Water Saving from Data" PPT courseware on data collection, organization and description

Learning objectives: Comprehensively apply the knowledge learned to solve problems and further consolidate the basic steps and methods of data management.

Learning focus: Comprehensive application of learned knowledge to solve problems.

Read the information in the textbook appendix, work in groups, and follow the steps below to answer the three questions on page 154.

1. Please accompany the short article with appropriate statistical charts to visually represent the distribution of water resources and freshwater resources on the earth.

What data in the passage represent the distribution of water and freshwater resources on Earth?

The total volume of water on the earth is 1.42 billion km3, of which ocean water accounts for more than 96.53% and fresh water accounts for about 2.53%.

Among fresh water, most exist in the form of glaciers, ice caps and groundwater at the poles. Glaciers and ice caps account for 77.2%, and groundwater accounts for 22.4%. However, the water that humans can use is less than 1%.

2. According to foreign experience, if a country's water consumption exceeds 20% of its total water resources, a "water crisis" may occur. Based on this standard, is my country likely to be in a "water crisis" category in 2008?

China's annual total water resources is approximately 275×10.4 billion m3. In 2008, the national agricultural water consumption was 366.4 billion m3, the national industrial water consumption was 140.1 billion m3, and the national domestic water consumption was 72.7 billion m3.

How to calculate whether the country's water consumption exceeded 20% of its total water resources in 2008?

(1) If you use a straight line close to as many scattered points as possible to represent this development trend of water consumption, can you try to draw this straight line on the graph?

(2) Based on the straight line, estimate the national domestic water consumption in 2009 and 2010, and compare it with the actual water consumption in these two years. Is your estimate accurate? Why?

It was 75 billion m3 in 2009 and 77 billion m3 in 2010. It is just an estimate based on a straight line and may not be accurate.

Summary

Through studying this lesson, do you have any new understanding of current water resources and the value brought by saving water resources?

Homework

Please work as a group to conduct a school-wide statistical survey with the theme of "Monthly domestic water consumption per capita in a household" and complete a survey report.

1. Give the purpose of the investigation, the objects of the investigation, the questionnaire, and the investigation methods.

2. Use tables to organize the collected data, use histograms to describe the data, and analyze the information contained in the data.

3. Calculate or estimate the average monthly domestic water consumption per capita of the entire school's families, and compare it with the national average monthly domestic water consumption per capita.

4. Combined with my country's water shortage situation, let's talk about the significance of water conservation and how to save water starting from me.

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"Talk about Water Saving from Data" Data collection, organization and description PPT courseware 3:

"Talk about Water Saving from Data" Data Collection, Arrangement and Description PPT Courseware 3 Question 1: What is the distribution of water resources and freshwater resources on the earth? Information: Water on the earth includes three categories: atmospheric water, surface water, and underground water. Surface water can be divided into ocean water and land water. Land...

"Talk about Water Saving from Data" Data collection, organization and description PPT courseware 2:

"Talk about Water Saving from Data" PPT courseware for data collection, organization and description 2. Think about what you think after reading the above picture? Saving water starts with me. Explore and read the information in the appendix of the textbook, collect data from it, and draw statistics Picture and answer the following questions: (..

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Update Time: 2024-11-18

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