Cycles
Life cycles, states of matter, reproduction and the water cycle — discover the patterns that repeat again and again in nature.
学习路径——由浅入深
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Life Cycles of Plants
What is a life cycle? Follow a seed as it sprouts into a seedling and grows into an adult plant that makes seeds of its own.
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Life Cycles of Animals
Compare the life cycles of animals like butterflies, frogs, chickens and mosquitoes — some young look like their parents, others change completely.
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Matter
Learn what matter is, the different states of matter around us, and how to measure the mass and volume of solids, liquids and gases.
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Reproduction in Animals and Plants
From pollination to seed dispersal, and how a new human life begins — discover how living things reproduce and pass on their traits.
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Cycles in Water
Follow water as it melts, evaporates, condenses and freezes, and learn why the water cycle gives us a constant supply of fresh water.
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