10.15

Today we reviewed the population pyramid in class and watched a short video
And then bolg, but I forgot
Then the teacher showed us a TV show, which was very nice
That's the whole class

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test

Today we did a test on latitude and longitude, time zones and maps in class Some of them, we did on the quiz last week, but fortunately I remember them. Fortunately, today's test is an open blog exam. We can check our blog, but we can't cheat The content of the test is relatively simple, I don't need to check my blog very much, because my blog doesn't record a lot of things The only question that puzzled me was about the time relationship between San Francisco and Maryland, and my answer was that when San Francisco was 11:30, Maryland was 2:30 and I hope I'm right
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10.17measuring population

crude birth/death rate number of birth/death per 1000 of the population rate of natural increase produced by subtracting the death rate from the birth rate this gives us the annual natural growth rate. -the percentage form-form country or region Net Migration Rate: the difference between the number of persons entering and leaving a country during a year an excess of persons entering the country is net immigration written as a positive number example: Canada has 5.65 migrants per 1,000 population                 United States: 2.45 (it was 3.62 in 2015) an excess of persons leaving the country is net emigration written as a negative number example: Mexico has -1.68 migrants per 1,000 population                                -3.61 two years ago, -3.11 last year
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10.18 Why do people migrate?

Why do people migrate? !!! push forces civil war environmental degradation unemployment or underemployment religious or ethnic persecution pull forces better economic opportunity better health services religious freedom political freedom Total Fertility Rate (TFR) TFR: average number of children born per woman for a population to remain the same, the TFR must be 2.1  If it’s higher than 2.1: population rises If it’s lower than 2.1: population falls World TFR:      2.42  (it was 2.54 two years ago, 2.47 last year)   US TFR:          2.01 (it was 2.06 last year) Nigeria TFR:   6.89 (developing nation) Japan TFR:     1.40 (developed nation, aging population)
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