Grade 3 · Science · Unit 3 of 7
Structures & Their Jobs
Natural and built structures, form and function
What your child practises
What makes something a structure, how its shape fits its job (a bowl-shaped nest, a sloped roof), structures built by animals and by people, and how they change the environment.
Saskatchewan Curriculum outcome: SM3.2 · natural and built structures and what they are for
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
Which structure's form best fits holding up a roof in the middle of a room?
🏛️- a sponge
- a sheet of paper
- a rope
- a post
Show answer
a post
Hint: A post is stiff and strong. It can hold weight from above.
Question 2
A human-made structure like a park bridge can give people a way to enjoy nature. This is one…
🌲- harm to the soil
- benefit to people
- danger to birds
- type of habitat
Show answer
benefit to people
Hint: Structures can have positive effects on the people who use them.
Question 3
Who built it? Tap an item, then tap its basket.
Sort into: 🐾 built by animals · 👷 built by people
- ⛺tent
- 🕸️spider web
- 🐝wasp nest
- 🦫beaver dam
- 🗼tower
- 🏠house
Show answer
🐾 built by animals: spider web, wasp nest, beaver dam · 👷 built by people: tent, tower, house
Hint: Animals build nests, dams and webs. People build bridges, towers and houses.
Question 4
A wide bridge across a river helps a town because it…
🌉- keeps out snow
- makes the river dry
- stops all boats
- lets people and goods cross
Show answer
lets people and goods cross
Hint: Structures meet the needs of communities.
Question 5
A dam holds back water, but it can also change a river's habitat. This is an example of a structure's…
🏞️- effect on the environment
- colour
- speed
- price
Show answer
effect on the environment
Hint: Structures can help people and also change habitats.
Question 6
A chair has a seat, legs and a back. What is its job?
🪑- to hold a person who is sitting
- to hold water
- to carry people across a river
- to keep the room cold
Show answer
to hold a person who is sitting
Hint: The chair's form (legs, seat, back) fits its function.