Symbiosis comes alive through real partnerships fifth graders can picture: bees pollinating flowers, ticks feeding on deer, oxpecker birds picking insects off rhinos, and remora fish hitching rides on sharks. Each example asks students to decide whether the relationship is mutualism, commensalism, or parasitism.
A matching section then sorts clownfish and sea anemones, tapeworms in a dog's intestines, barnacles on whales, and lichen on rocks into the right interaction type. Students leave able to tell when both species win, when one benefits and one is unbothered, and when one organism harms another.
Style:
Ecosystems
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A close, long-term relationship between two different species is called symbiosis.
2. In mutualism, both species benefit from the relationship.
3. In commensalism, one species benefits while the other is neither helped nor harmed.
4. A parasite lives on or inside another organism and takes nutrients at the host's expense.
5. Bees pollinating flowers while collecting nectar is an example of mutualism.
6. When two species compete for the same food or space, the interaction is called competition.
7. A tick feeding on a deer's blood is an example of parasitism.
8. Small birds that ride on a rhinoceros to eat insects are an example of mutualism.
9. A remora fish attaching to a shark for free transportation without affecting the shark is commensalism.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Clownfish living safely among sea anemone tentacles
→ Mutualism — clownfish gets protection and anemone gets food scraps
Commensalism — barnacles get a surface to live on; whale is unaffected
Tapeworm living inside a dog's intestines
→ Parasitism — tapeworm absorbs nutrients and the dog loses nourishment
Mutualism — clownfish gets protection and anemone gets food scraps
Barnacles growing on a whale's skin
→ Commensalism — barnacles get a surface to live on; whale is unaffected
Mutualism — fungus gets food from algae and algae gets moisture from fungus
Fungi and algae forming lichen on a rock
→ Mutualism — fungus gets food from algae and algae gets moisture from fungus
Parasitism — tapeworm absorbs nutrients and the dog loses nourishment
Ecosystems
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) A close, long-term relationship between two different species is called symbiosis.
2) In mutualism, both species benefit from the relationship.
3) In commensalism, one species benefits while the other is neither helped nor harmed.
4) A parasite lives on or inside another organism and takes nutrients at the host's expense.
5) Bees pollinating flowers while collecting nectar is an example of mutualism.
6) When two species compete for the same food or space, the interaction is called competition.
7) A tick feeding on a deer's blood is an example of parasitism.
8) Small birds that ride on a rhinoceros to eat insects are an example of mutualism.
9) A remora fish attaching to a shark for free transportation without affecting the shark is commensalism.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Clownfish living safely among sea anemone tentacles
→ Mutualism — clownfish gets protection and anemone gets food scraps
Commensalism — barnacles get a surface to live on; whale is unaffected
Tapeworm living inside a dog's intestines
→ Parasitism — tapeworm absorbs nutrients and the dog loses nourishment
Mutualism — clownfish gets protection and anemone gets food scraps
Barnacles growing on a whale's skin
→ Commensalism — barnacles get a surface to live on; whale is unaffected
Mutualism — fungus gets food from algae and algae gets moisture from fungus
Fungi and algae forming lichen on a rock
→ Mutualism — fungus gets food from algae and algae gets moisture from fungus
Parasitism — tapeworm absorbs nutrients and the dog loses nourishment
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10-15 minutes
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