Grade 9 · Science · Unit 4 of 11
Climate Change
Causes, evidence and solutions
What your child practises
The greenhouse effect, how fossil fuels and other human activities add greenhouse gases, indicators of climate change, effects on Canadian ecosystems and communities, and the difference between mitigation and adaptation. Effects on First Nations, Métis and Inuit communities are not covered yet and need community review.
Ontario Curriculum expectation: B1.1, B2.6 · causes and indicators of climate change, effects on ecosystems, and mitigation and adaptation
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
Warmer winters in parts of Ontario have helped ticks that carry Lyme disease spread north. This is an example of climate change affecting…
- the speed of light
- the number of planets
- where organisms can live and survive
- the strength of gravity
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where organisms can live and survive
Hint: Fewer very cold days means more ticks survive the winter.
Question 2
Climate is…
- the weather today
- a storm
- the temperature at noon
- the average weather in a region over many years
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the average weather in a region over many years
Hint: Weather changes daily. Climate is the long-term pattern, usually 30 years or more.
Question 3
A household produces 16 tonnes of CO₂ a year. A program cuts this by 50%. How many tonnes are cut?
answer boxt
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8 t
Hint: 50% of 16 = 16 × 0.5 = 8 tonnes.
Question 4
Which human activity has added the most carbon dioxide to the atmosphere since 1850?
- meteorites
- burning fossil fuels
- ocean waves
- volcanoes
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burning fossil fuels
Hint: Natural sources exist, but fossil fuels are the largest source of the recent increase.
Question 5
Building a sea wall to protect a coastal town from higher seas is an example of…
- photosynthesis
- adaptation
- succession
- mitigation
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adaptation
Hint: Adaptation means adjusting to the effects of climate change.
Question 6
Which is a greenhouse gas?
- helium
- argon
- methane
- nitrogen
Show answer
methane
Hint: Carbon dioxide, methane, nitrous oxide and water vapour trap heat. Nitrogen, argon and helium do not.