Grade 4 · Science · Unit 1 of 8
Waste & Dangerous Materials
Reduce, reuse, recycle and stay safe around hazards
What your child practises
Children compare ways to manage waste (landfills, recycling, composting, repairing and reusing), plan to cut their own waste, and learn hazard symbols and why dangerous household materials need an adult and safe disposal.
Alberta Curriculum learning outcome: 4M 1.1, 4M 1.2 · managing waste, its environmental effects, and dangerous materials and their symbols
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
Burning garbage can release gases into the air. Which sphere of Earth does this affect most directly?
💨- the sun
- the moon
- the lithosphere only
- the atmosphere
Show answer
the atmosphere
Hint: Gases from smoke go into the air.
Question 2
Which could you do to start a personal plan to cut waste?
🥕- buy more packaged snacks
- throw cans in the trash
- use a new bag every day
- pack a litter-less lunch
Show answer
pack a litter-less lunch
Hint: A plan names small steps you can do every day.
Question 3
A label has a picture of a liquid eating through a hand. What does it warn about?
⚠️- the product is good to drink
- the product is corrosive and can burn skin
- the product is a recycling item
- the product is cold
Show answer
the product is corrosive and can burn skin
Hint: Corrosive products can damage skin, eyes and materials.
Question 4
What is it called when you find a new use for something, like making a planter out of an old boot?
🥾- littering
- burning
- repurposing
- wasting
Show answer
repurposing
Hint: Repurposing gives an item a second life.
Question 5
What does it mean to reduce waste?
➖- to hide it
- to make less of it
- to burn it
- to bury it deeper
Show answer
to make less of it
Hint: Using less means there is less to throw away.
Question 6
Put the steps of recycling an aluminum can in order.
- 🧺sort it with other metal
- 🏭make new products
- 🥫collect the used can
- 🔥melt it down
Show answer
collect the used can → sort it with other metal → melt it down → make new products
Hint: The can is collected, sorted, melted and made into something new.