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Chapter 5: Life Cycles of Animals
第五章：动物的生命周期
P3 Science · 小三科学 · Cycles Theme · 3 Learning Pages
🎤 Each page has click-to-speak vocabulary and quizzes · 每页都有点击朗读的词汇和测验
📋 What I Am Learning · 学习目标
What animals have three-stage life cycles? How do the young look different from adults?
哪些动物有三阶段生命周期？幼体与成体有何不同？
What animals have four-stage life cycles? What is "complete metamorphosis"?
哪些动物有四阶段生命周期？什么是"完全变态"？
How do we compare the life cycles of different animals?
我们怎样比较不同动物的生命周期？
🟢 Part A · Three-Stage Life Cycles 三阶段生命周期
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Three-Stage Life Cycles
三阶段生命周期
Chicken (egg→chick→adult), frog (egg→tadpole→adult), grasshopper and cockroach (egg→nymph→adult). Key: some young look like adults, some don't.
🟠 Part B · Four-Stage Life Cycles 四阶段生命周期
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Four-Stage Life Cycles
四阶段生命周期
Butterfly (egg→caterpillar→pupa→adult), mealworm beetle (egg→larva→pupa→adult), mosquito (egg→wriggler→pupa→adult). Dengue prevention: BLOCK.
🔴 Part C · Comparing Life Cycles 比较生命周期
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Comparing Life Cycles
比较生命周期
Similarities and differences: frog vs grasshopper, frog vs mosquito. Life cycles repeat — no first or last stage. Comparison tables and key facts.
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