Grade 3 · Science · Building Confidence
Free Life Science & Ecosystems worksheet - version 20
Grade 3 life science & ecosystems practice with original, difficulty-matched questions. This printable version includes 8 grade-appropriate questions and a separate answer sheet.
Life Science & Ecosystems
Grade 3 · Building confidence · 8 questions · Version PG-N7MOMN-2ZL2
1.Explain “food web” in your own words.
2.Explain “decomposer” in your own words.
3.Explain “consumer” in your own words.
4.Explain “pollination” in your own words.
5.Explain “food chain” in your own words.
6.Explain “carrying capacity” in your own words.
7.Explain “biodiversity” in your own words.
8.Explain “photosynthesis” in your own words.
Answers and teaching notes
Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.
Show answers for version 20
- Explain “food web” in your own words.connected food chains in an ecosystem
- Explain “decomposer” in your own words.an organism that breaks down dead material
- Explain “consumer” in your own words.an organism that gets energy by eating others
- Explain “pollination” in your own words.the transfer of pollen that helps plants reproduce
- Explain “food chain” in your own words.a sequence showing how energy moves between organisms
- Explain “carrying capacity” in your own words.the largest population an environment can support
- Explain “biodiversity” in your own words.the variety of living things in an area
- Explain “photosynthesis” in your own words.the process plants use to make sugar from light, water, and carbon dioxide
Worked example
Connect structures and behaviors to survival, growth, reproduction, and energy flow.
Common mistake
Describing a trait without explaining its function.
Helpful hint
Ask how the feature affects survival or reproduction.