What is the current estimate of the worldwide population at this moment? Describe how this number is changing moment-to-moment, day-to-day and from one year to the next.

Check this site.

http://math.berkeley.edu/~galen/popclk.html

To find the current estimate of the worldwide population, you can refer to various sources such as the United Nations, the World Bank, or the U.S. Census Bureau. These organizations regularly update their estimations based on statistical data and demographic trends.

The worldwide population is constantly changing moment-to-moment due to births, deaths, and migration. Each second, there are several births and deaths occurring around the world, leading to small fluctuations in the population count.

On a day-to-day basis, the global population tends to increase due to the cumulative effect of more births than deaths. However, the rate of change may vary depending on various factors such as fertility rates, mortality rates, and migration patterns in different countries.

From one year to the next, the worldwide population generally increases. This growth is influenced by various factors such as birth rates, life expectancy, and overall health improvements. However, it's important to note that population growth rates vary between different countries and regions. Some countries may experience rapid population growth, while others may have declining populations due to factors like low birth rates or emigration.

To get the most accurate and up-to-date estimate of the worldwide population and to understand how it changes, it's best to refer to official sources that regularly publish demographic data and projections.