Things step up as third graders dig into food webs and ecosystem roles. Part A has nine fill-in-the-blank items covering food webs, decomposers, omnivores, coral reef shelter, what happens when a species is removed, soil as a nonliving part, ocean phytoplankton, primary consumers like deer eating grass, and top predators like hawks and wolves. Part B is a four-pair matching set sorting an oak tree, mushroom, grasshopper, and wolf into producer, decomposer, primary consumer, and secondary consumer.
This sheet pushes students from naming habitats to reasoning about how every organism fits into the bigger picture.
Style:
Habitats and Ecosystems
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A food web is made of many food chains that overlap.
2. Organisms that eat dead material and recycle nutrients are decomposers.
3. A omnivore eats both plants and animals.
4. Coral reefs provide shelter for thousands of ocean species.
5. Removing one species from a food web can disrupt the whole ecosystem.
6. Sunlight, water, and soil are nonliving parts of an ecosystem.
7. In the ocean, tiny floating plants called phytoplankton start many food chains.
8. A primary consumer eats producers directly, like a deer eating grass.
9. Hawks and wolves are at the top of their food chains.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each organism to its role in a food chain.
oak tree
→ producer
decomposer
mushroom
→ decomposer
secondary consumer
grasshopper
→ primary consumer
producer
wolf
→ secondary consumer
primary consumer
Habitats and Ecosystems
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) A food web is made of many food chains that overlap.
2) Organisms that eat dead material and recycle nutrients are decomposers.
3) A omnivore eats both plants and animals.
4) Coral reefs provide shelter for thousands of ocean species.
5) Removing one species from a food web can disrupt the whole ecosystem.
6) Sunlight, water, and soil are nonliving parts of an ecosystem.
7) In the ocean, tiny floating plants called phytoplankton start many food chains.
8) A primary consumer eats producers directly, like a deer eating grass.
9) Hawks and wolves are at the top of their food chains.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each organism to its role in a food chain.
oak tree
→ producer
decomposer
mushroom
→ decomposer
secondary consumer
grasshopper
→ primary consumer
producer
wolf
→ secondary consumer
primary consumer
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