"Talk about Water Saving from Data" Data Collection, Arrangement and Description PPT Courseware 3

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"Talk about Water Saving from Data" Data Collection, Arrangement and Description PPT Courseware 3

Question 1: What is the distribution of water 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 terrestrial water. Terrestrial water can be divided into glaciers, rivers, lakes, etc. The total volume of water on the earth is 14.2 billion cubic kilometers. Among them, ocean water accounts for more than 96.53%, and fresh water accounts for about 2.53%. Among fresh water, most of it exists in the glaciers and ice caps of the two poles and in the form of groundwater, of which glaciers and ice caps account for 77.2% of groundwater. Accounting for 22.4%, and the water that humans can use is less than 1%.

Question 2: What is the water consumption of agriculture and industry in my country?

Data: Agricultural water consumption increased from 419.5 billion cubic meters in 1979 to 463.4 billion cubic meters in 1990, and to 514.7 billion cubic meters in 2000; industrial water consumption increased from 52.3 billion cubic meters in 1979 to 52.3 billion cubic meters in 1990. 70.2 billion cubic meters rose to 94.4 billion cubic meters in 2000. Water efficiency is very low. 60% of the water used to irrigate farmland is consumed by evaporation and infiltration. The industrial water reuse rate is only 50%.

Activity 2: Use simple random sampling method to investigate the average monthly water consumption of all students in the school and answer the questions.

Question 1: What content should the designed questionnaire include?

Answer: It includes information needed to complete this activity such as the number of family members, total monthly water consumption, average monthly water consumption per household, etc., as well as questions related to household water habits, such as whether to turn off the faucet during face washing (or bathing), etc.

Question 2: What is the sample size drawn? How to draw samples?

Answer: The sample size drawn is 50, which is all students in this class.

Operation:

Combined with statistical charts and survey results, write a survey report to explain the situation of water shortage in my country, the waste of water resources, and the urgency and feasible methods of saving water.

Note: Students can refer to the following questions to complete this project report:

Water resources are limited;

my country’s water consumption is increasing year by year;

There has been a water crisis in our country;

The importance of water conservation;

Suggest good ideas.

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