养分是怎么回到土壤里的？
Why do nutrients return to the soil?
枯叶和死去的动植物被细菌和蚯蚓分解，里面的矿物质重回泥土，供新植物吸收。这个循环让土壤一直有养分。
Fallen leaves and dead creatures are broken down by bacteria and worms, returning minerals to the soil for new plants. This cycle keeps the ground fertile.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#养分 #土壤 #循环
湿地是怎么把水变干净的？
Why do wetlands clean water?
湿地里的水流变慢，泥沙沉底，芦苇等植物和微生物还能吸走污染物和多余养分。湿地就像大地的天然净水器。
In wetlands water slows down so silt settles and reeds, microbes, and soil soak up pollutants and extra nutrients. A wetland works like nature's water filter.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#湿地 #净水 #水
地下水为什么很重要？
Why is groundwater important?
雨水渗进地下存进岩石缝里，成了地下水，平时我们打的井水就来自它。地下水还悄悄补给河流和湿地。
Rain soaks into the ground and is stored in rock cracks as groundwater, which is what wells draw from. It also quietly feeds rivers and wetlands.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#地下水 #水 #井
水循环是怎么转起来的？
How does the water cycle work?
太阳让海河湖的水蒸发成云，云下雨落回地面，再流回大海，这就是水循环。水就这样在天上地下不停旅行。
The Sun evaporates water from seas and lakes into clouds, the clouds rain down, and the water flows back to the ocean; that is the water cycle. Water keeps traveling between sky and ground.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#水循环 #水 #云
泥土对我们为什么很重要？
Why is dirt important to us?
泥土里藏着养分和水分，植物靠它长大，我们吃的许多食物都从土里来。
Soil holds nutrients and water that plants need to grow, and much of our food comes from the ground.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#土壤 #泥土 #植物
树叶秋天为什么会变颜色？
Why do leaves change color in autumn?
秋天天气变冷，树叶里的绿颜色退去，黄红颜色露出来，叶子就变了色。
In autumn it gets cold, the green color in leaves fades away, and yellow and red colors show through.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#树叶 #秋天 #植物
土壤是怎么从石头变成的？
Why does soil come from rock?
岩石经风化碎成细粒，再混进枯叶和微小生物，慢慢变成能种东西的土壤。这个过程要花成千上万年。
Rock breaks into fine grains through weathering and mixes with dead leaves and tiny creatures, slowly becoming fertile soil. The process takes thousands of years.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#土壤 #岩石 #风化
地下含水层怎么存住水？
Why do aquifers store groundwater?
含水层是地下能存水的砂石层，雨水渗下去被孔隙留住，像天然水库。人们打井就能取出这些藏起来的水。
An aquifer is a buried layer of sand and rock that stores water in its pores, acting like a natural tank fed by rain. Wells tap this hidden supply.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#含水层 #地下水 #水
树秋天为什么会落叶？
Why do trees drop their leaves?
秋天变冷变干，树把叶子里的养分收回，叶子失去绿素就脱落，好省水过冬。这是树的过冬办法。
In cold, dry autumn the tree pulls nutrients back from its leaves, the green fades, and the leaves drop to save water for winter. It is the tree's way to survive.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#树叶 #落叶 #植物