Grade 7 · Science · Unit 6 of 14
Plants We Use
Food, fibre and farms
What your child practises
How people use plants for food, fibre and medicine, crops grown in Alberta such as wheat and canola, changing land use and the effects of growing only one crop.
Alberta Curriculum learning outcome: Unit B: Plants for Food and Fibre · human uses of plants, crops and changing land use
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
Wheat is mainly grown for…
- its fibre for clothing
- its bark
- its grain, which is ground into flour
- its roots
Show answer
its grain, which is ground into flour
Hint: Bread, pasta and noodles often start as wheat.
Question 2
Trees in a forest also help the environment by…
- preventing all rain
- holding soil, giving habitat and taking in carbon dioxide
- removing all oxygen
- making the air colder
Show answer
holding soil, giving habitat and taking in carbon dioxide
Hint: Forests do many jobs besides giving wood.
Question 3
Irrigation is…
- adding fertilizer to soil
- spraying crops to kill insects
- watering crops by adding water from rivers, canals or wells
- harvesting wheat
Show answer
watering crops by adding water from rivers, canals or wells
Hint: Irrigation helps crops in dry areas, such as southern Alberta.
Question 4
A farmer grows only one kind of crop on a very large area. What is this called?
- A shelterbelt
- A monoculture
- A greenhouse
- Crop rotation
Show answer
A monoculture
Hint: Mono means one.
Question 5
Which crop is a pulse (a legume) grown in Alberta?
- Sugar beets
- Hemp
- Field peas
- Barley
Show answer
Field peas
Hint: Pulses such as peas and lentils grow seeds in pods.
Question 6
Which is a possible problem of growing the same crop on the same field for many years?
- Pests and diseases can build up and soil nutrients can run low
- The soil turns into rock
- The crop needs no water
- The crop gets less sunlight
Show answer
Pests and diseases can build up and soil nutrients can run low
Hint: Variety helps keep soil and plants healthy.