Tuesday Population calculations
Presentation
•
Science
•
9th Grade
•
Medium
Standards-aligned
Jason Gvazdauskas
Used 6+ times
FREE Resource
10 Slides • 15 Questions
1
By Jason Gvazdauskas
2
© 2014 Pearson Education, Inc.
Populations may grow, shrink, or remain stable
▪ Natural rate of population increase=
(Crude birth rate) − (crude death rate)
▪ Population change due to internal factors
▪ Population growth rate=
(Crude birth rate + immigration rate) − (Crude death rate + emigration rate)
▪ Net changes in a population’s size/1000/year
▪ Growth rate as a percent = Population growth rate × 100%
▪ Populations of different sizes can be compared
3
Number of births per 1,000 people in a population in a year.
The world's population is 8.2 Billion people
The CBR for the world is 17
So, through the math, the world is adding 139,400,000 people
(8,200,000 * 17)
Formula =(Number of live births / Estimated midyear Population) x 1,000.
4
The number of deaths in a population per 1000 people in a year.
Again, the world's population is 8.2
The CDR is 7.7
So effectively the world is losing 63,140,000 people per year.
Formula =(Number of live deaths / Estimated midyear Population) x 1,000.
5
Multiple Choice
The CBR of Togo is 30 and the CDR is 10. What is the growth rate?
(Crude birth rate - Crude death rate)/10 = r%
20%
40%
2%
6%
6
Crude Birth Rate - Crude Death Rate
18.1 - 7.7
NIR for the world is +10.4 people per 1000 per year.
7
Multiple Choice
The CBR of Togo is 30 and the CDR is 10. What is the Natural increase?
20%
40%
2%
6%
8
Birthrate and Death rate
Growth occurs when birthrate is higher than its death rate
Equal birth and death rate - zero growth
Death rate higher than birthrate- decrease in populaiton
Some text here about the topic of discussion
9
Multiple Select
Factors that affect population size:
DECREASE: Number of ___________ & ____________
Choose all that applies.
Birth
Death
Immigration
Emigration
10
Immigration and Emigration
Immigration: when individuals move into a population range
Emigration: when individuals move out of a population range
Some text here about the topic of discussion
11
Multiple Choice
A small island nation is tracking its total population. It started with exactly 100 people. During the year, 10 people immigrated, while 20 emigrated. The birth rate was 15, and the death rate was 5. What is the new population of the country?
115
110
90
No change; the population is still 100.
12
Multiple Choice
A metropolitan area of 100,000 people has 2,000 births, 500 deaths, 200 emigrants, and 100 immigrants. Calculate the population growth rate.
1.2 percent
1.4 percent
1.6 percent
1.8 percent
13
14
15
The amount of time needed for a population to double based on it's natural increase rate.
Rule of 70
formula=70/growth rate as a percent
16
Multiple Choice
In 2012, there were 20 births per 1,000 people and 5 deaths per 1,000 people in Peru. Calculate the approximate doubling time of Peru's populaiton.
5 years
15 years
47 years
72 years
17
Multiple Choice
The town of Fremont has a population of 2,000. In 2019, the town has 50 deaths, 20 immigrants, and 30 emigrants. The town's population growth rate is 4.5%. Calculate the approximate doubling time of Fremont.
16 years
22 years
45 years
88 years
18
Multiple Choice
A country has a net immigration rate of 3 per 1,000, a CBR of 9 per 1,000, and a CDR of 11 per 1,000. Calculate the growth rate of this country.
0.1 percent
0.2 percent
0.5 percent
1 percent
19
Fill in the Blanks
Loboville is an island of 4000 square miles off the coast of Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Identify the current population of Loboville.
20
Fill in the Blanks
Loboville is an island of 4,000 square miles off the coast ot Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Calculate the current population density (round to the nearest whole number).
Type answer...
21
Fill in the Blanks
Loboville is an island of 4000 square miles off the coast ot Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Calculate the birth rate as a % of Loboville (round to the tenths place).
22
Fill in the Blanks
Loboville is an island of 4000 square miles off the coast ot Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Calculate the death rate of Loboville (round to the tenths place).
Type answer...
23
Fill in the Blanks
Loboville is an island of 4000 square miles off the coast ot Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Calculate the population growth rate (round to the tenths place).
Type answer...
24
Fill in the Blanks
Loboville is an island of 4000 square miles off the coast ot Los Amigos. There are currently 250,000 inhabitants of Loboville. Last year, there were 12,000 new children born and 10,000 people were recorded as deceased. Calculate the doubling time for Loboville (round to the nearest whole number).
Type answer...
25
Multiple Choice
The town of Fremont has a population of 2,000. In 2019, the town has 50 deaths, 20 immigrants, and 30 emigrants. The town's population growth rate is 4.5%. Calculate the crude birth rate in 2019.
70
75
95
105
By Jason Gvazdauskas
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