Grade 7 Ecology & populations worksheet in three levels
The same 20-question worksheet on ecology & populations in Support, Core and Challenge versions. Question by question, each version keeps the topic and changes the difficulty.
Easier questions on the same topics, for students who need more practice with the basics.
Questions
20 (20 medium)
Grade range
Grades 4 to 11
Topics
Ecology & populations
Sample questions
A supplied food-web model transfers 13% of 725 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
A supplied food-web model transfers 24% of 90 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
A supplied food-web model transfers 8% of 1215 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
Core
Questions at the expected level for the grade.
Questions
20 (20 medium)
Grade range
Grades 4 to 11
Topics
Ecology & populations
Sample questions
A supplied food-web model transfers 12% of 826 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
A supplied food-web model transfers 19% of 1343 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
A supplied food-web model transfers 6% of 177 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
Challenge
Harder questions on the same topics, for students who are ready to stretch.
Questions
20 (20 challenge)
Grade range
Grades 9 to 12
Topics
Ecology & populations
Sample questions
In this simplified food chain: phytoplankton → krill → baleen whale. At which trophic level is “krill”? (Producers are level 1.)
In this simplified food chain: willow shrubs → moose → wolf. At which trophic level is “willow shrubs”? (Producers are level 1.)
In this simplified food chain: grass → grasshopper → frog → snake → hawk. At which trophic level is “grass”? (Producers are level 1.)
Using the three versions
Start everyone with the same short explanation, then hand out Support, Core or Challenge.
Question numbers line up across the versions, so you can go through the answers with the whole class.
The PDF has a cover page and each version on its own pages; the answer keys PDF has all three keys.