Based on current growth rates, Earth’s human population in 2019 w...

Question

Based on current growth rates, Earth’s human population in 2019 will be closest to
a. 2.5 million.
b. 4.5 billion.
c. 7.5 billion.
d. 10.5 billion.

Accepted Answer

Hi everyone welcome back. Here's our next problem. The annual average rate of change in population size for a specific geographic area during a certain time period is referred to as the And our choices are birth rate, death rate, growth rate or reproductive rate. Well, we're looking here at the rate of change in population size. Well, what are things that change? Population size, births and deaths? So when we look at our answer choices, if we look at choice, a birth rate, Well, birth rate is going to be part of that rate of change, but not the whole picture won't account for the population changing due to death. So choice A is not our complete enough choice be death rate and complete for the opposite reason. If we only have deaths and out births, we can't look at the overall picture of rate of change in the population size toi C is growth rate. And that is our correct answer. Because we're looking at the population growth rate. Not forgetting that growth could be negative. The population could be decreasing in size, but growth is looking at the average rate of change for a specific geographic area over a specific period of time. And finally, choice. The reproductive rate, reproductive rate is looking at the number of offspring in the next generation is the generation replacing itself is the number of offspring greater or less than the number of parents often expresses a fertility rate. The number of Children per women. But again, looking that will affect is the population growing or shrinking. But that's only looking at births not deaths. So not the complete picture and not the answer we need. So our answer's choice C growth rate for that rate of change in population size. Your next video.

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