SME
Grade 7 Science · Problem type
A pesticide up the food chain
Use this for “Which animal ends up with the most pesticide in its body?”
Put in order
Order the pond organisms from least to most pesticide in each body.
1
?
2
?
3
?
4
?
5
?
Assumptions
•
A pesticide that is not broken down stays in an animal’s body.
•
Each eater takes in everything its many meals carried, so the amount grows at each level: bioaccumulation.
•
The top predator ends up with the most, even though it was sprayed on nobody.
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
Refresh
Related lessons
Energy flow and matter cycling in ecosystems
Main lesson
The carbon cycle
Use this for “How does carbon get from the air into an animal, and back?”
Producer, consumer or decomposer?
Use this for “Which organisms in the food web are primary consumers?”
Take one out of the food web
Use this for “What happens to the fox population if the rabbits disappear?”
Will the population grow or shrink?
Use this for “How would planting fruit trees affect the orangutan population?”