Canada Grade 6 Science Sustainability

What is sustainability?

• Using resources responsibly so they last for future generations.

• Using as many resources as possible.

• Ignoring environmental issues.

• Overusing natural resources.

Answer explanation

Sustainability means using resources responsibly to ensure they are available for future generations, rather than overusing or ignoring them. The correct choice emphasizes the importance of responsible resource management.

What does "reduce" mean in the 3Rs of waste management?

• Reuse old materials.

• Create more waste.

• Use less to minimize waste.

• Throw away items.

Answer explanation

In the context of the 3Rs of waste management, "reduce" means to use less to minimize waste. This approach focuses on decreasing the amount of waste generated, making it the correct choice.

What is an example of renewable energy?

• Coal.

• Solar power.

• Natural gas.

• Oil.

Answer explanation

Solar power is a renewable energy source that harnesses energy from the sun, making it sustainable and environmentally friendly. In contrast, coal, natural gas, and oil are non-renewable fossil fuels that contribute to pollution.

Which is a non-renewable resource?

• Wind.

• Water.

• Trees.

• Oil.

Answer explanation

Oil is a non-renewable resource because it forms over millions of years and cannot be replenished on a human timescale, unlike wind, water, and trees, which are renewable resources.

What is the purpose of recycling?

• To burn waste materials.

• To create new products from used materials.

• To dump waste in landfills.

• To use more energy.

Answer explanation

The purpose of recycling is to create new products from used materials, reducing waste and conserving resources. This process helps minimize the need for raw materials and lowers energy consumption compared to producing new items.

How does deforestation affect the environment?

• It improves air quality.

• It reduces carbon dioxide.

• It destroys habitats and increases carbon dioxide.

• It has no impact on animals.

Answer explanation

Deforestation destroys habitats for many species, leading to loss of biodiversity. It also increases carbon dioxide levels in the atmosphere, contributing to climate change, making this choice the correct answer.

Which of these materials can be recycled?

• Plastic bottles.

• Food scraps.

• Ceramic plates.

• Old batteries.

Answer explanation

Plastic bottles are widely accepted in recycling programs, while food scraps are typically composted, ceramic plates are not recyclable, and old batteries require special disposal methods.

What is composting?

• Burning waste materials.

• Turning organic waste into fertilizer.

• Sending trash to the landfill.

• Recycling glass.

Answer explanation

Composting is the process of turning organic waste, such as food scraps and yard waste, into fertilizer. This method enriches soil and reduces waste, making it the correct choice compared to burning, landfilling, or recycling glass.

Which gas is a major cause of climate change?

• Oxygen.

• Carbon dioxide (CO2).

• Nitrogen.

• Helium.

Answer explanation

Carbon dioxide (CO2) is a major greenhouse gas that traps heat in the atmosphere, significantly contributing to climate change. Unlike oxygen, nitrogen, and helium, CO2 levels have risen due to human activities, impacting global temperatures.

Why is water conservation important?

• Because water is unlimited.

• To reduce water pollution.

• To ensure enough water for future generations.

• To waste less energy.

Answer explanation

Water conservation is crucial to ensure enough water for future generations, as freshwater resources are limited. Sustainable practices help maintain water availability and support ecosystems.