Grade 9 · Social Studies · Unit 9 of 11
A Changing Population
Aging, growth and global issues
What your child practises
How an aging population, small-town decline and city growth affect people, government strategies on immigration and families, the 'rule of 70', and how people in Canada respond to global population issues.
Ontario Curriculum expectation: D2.1, D2.2, D2.3, D2.4 · effects of population change, strategies to address Canada's changing population, and global population issues
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
How can an individual in Canada help with a global population issue like hunger?
- ignore the issue
- avoid learning about it
- donate or volunteer with a trusted organization
- waste food
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donate or volunteer with a trusted organization
Hint: Individuals, organizations and governments all play roles.
Question 2
The 'rule of 70' estimates doubling time: 70 ÷ the growth rate (as a percent). About how many years does a population growing 2% a year take to double?
answer boxyears
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35 years
Hint: 70 ÷ 2 = 35 years.
Question 3
In a community of 1000 people, 100 are 65 or older. What percent of the community is 65 or older?
answer box%
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10 %
Hint: 100 ÷ 1000 × 100 = 10%.
Question 4
Which is a global population issue that people in Canada may be concerned about?
- the colour of a school bus
- a favourite team
- refugees and hunger in other countries
- local weather today
Show answer
refugees and hunger in other countries
Hint: Canadians respond through aid, sponsorship and organizations.
Question 5
About how many people live on Earth today?
- 800 million
- 80 billion
- 8 billion
- 8 million
Show answer
8 billion
Hint: The world population passed 8 billion in 2022.
Question 6
Which statement about a rapidly growing city is most accurate?
- Planners must expand housing, transit, water and schools to keep up
- Cities cannot grow
- Nothing needs to change
- Planning is not necessary
Show answer
Planners must expand housing, transit, water and schools to keep up
Hint: Growth must be planned for in advance.