Primary 3 STELLAR Thematic Vocabulary Worksheets - Free Printable

Let’s go through each question one by one. We’ll think about what makes sense based on how plants like the Venus Flytrap work and general knowledge about carnivorous plants.

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Question 1:
*When the leaf of the plant closes, it will ______ the insect in it.*
Options: (1) seal, (2) hide, (3) pull, (4) close

→ When a Venus Flytrap catches an insect, its leaves snap shut and trap the bug inside. The word “seal” means to close tightly so nothing can get out — that fits best. “Close” is already used in the sentence (“when the leaf... closes”), so we don’t want to repeat it. “Hide” or “pull” don’t make sense here.
✔ Correct answer: (1) seal

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Question 2:
*The ant in the Venus Flytrap cannot ______ through the leaves to escape.*
Options: (1) pinch, (2) squeeze, (3) graze, (4) trample

→ Ants are small. If they’re trapped, they might try to wiggle or push their way out. “Squeeze” means to force yourself through a tight space — that’s what the ant would try to do. “Pinch,” “graze,” and “trample” don’t fit.
✔ Correct answer: (2) squeeze

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Question 3:
*It is not easy to see the ______ hairs on the leaves of the Venus Flytrap. You need a magnifying glass.*
Options: (1) tiny, (2) soft, (3) close, (4) white

→ If you need a magnifying glass to see them, they must be very small. “Tiny” means extremely small — perfect! “Soft,” “close,” or “white” don’t explain why you’d need a magnifier.
✔ Correct answer: (1) tiny

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Question 4:
*Carnivorous plants ______ special juices to digest the insects they trap.*
Options: (1) drink, (2) create, (3) release, (4) scatter

→ Plants don’t “drink” juice to digest bugs — they make it themselves. They “create” the digestive juices inside their traps. “Release” could sound okay, but “create” is more accurate because the plant produces the juice first. “Scatter” doesn’t fit at all.
✔ Correct answer: (2) create

*(Note: Some might argue “release” — but in science context, “create” is better because the plant synthesizes the enzymes/juices.)*

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Question 5:
*Some plants capture insects in a ______ second.*
Options: (1) split, (2) short, (3) tight, (4) twinkle

→ This is a common phrase: “in a split second” means very quickly — almost instantly. That matches how fast a Venus Flytrap snaps shut. “Short second” isn’t a real phrase. “Tight” or “twinkle” don’t fit.
✔ Correct answer: (1) split

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Question 6:
*Some insects are attracted to ______ smells like rotting meat and not the sweet smell of nectar.*
Options: (1) sharp, (2) strong, (3) unusual, (4) unpleasant

→ Rotting meat smells bad — so “unpleasant” fits perfectly. Insects like flies love those smelly things. “Sharp” or “strong” could describe the smell, but “unpleasant” tells us *why* it’s different from sweet nectar. “Unusual” is too vague.
✔ Correct answer: (4) unpleasant

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Question 7:
*The ______ poison from some plants can lead to death. Be careful when you see a plant that you do not recognise.*
Options: (1) cruel, (2) deadly, (3) violent, (4) wicked

→ Poison that causes death is called “deadly.” That’s the exact word we use for something that can kill. “Cruel,” “violent,” and “wicked” describe behavior, not poison.
✔ Correct answer: (2) deadly

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Question 8:
*If plants do not ______, the species will become extinct one day.*
Options: (1) obey, (2) develop, (3) recreate, (4) reproduce

→ For any living thing to survive as a species, it must have babies — that’s “reproduce.” If plants don’t reproduce, there won’t be new ones, and the species dies out. “Obey,” “develop,” or “recreate” don’t mean having offspring.
✔ Correct answer: (4) reproduce

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Final Answer:
1. (1)
2. (2)
3. (1)
4. (2)
5. (1)
6. (4)
7. (2)
8. (4)