岩石和土壤

认识土壤是由岩石和有机质构成的，不同的土壤有不同的特性。

Recognise that soils are made from rocks and organic matter, and that different soils have different properties

学习证据 / Evidence

• 能说出土壤是岩石碎屑和腐烂的有机物（腐殖质）混合而成的。
• 能比较至少两种土壤（沙土、黏土、壤土），并描述它们的不同特性。
• 能解释土壤的形成需要很长时间，因为岩石是一点一点慢慢破碎的。

• State that soil is a mixture of broken-down rock particles and decomposed organic matter (humus)
• Compare at least two types of soil (sandy, clay, loam) and describe their different properties
• Explain that soil formation takes a very long time as rocks gradually break down

评估问题 / Assessment

{{name}}能解释土壤不只是泥土——它是由细小的岩石碎屑和枯叶等有机物混合而成的吗？

Can {{name}} explain that soil isn't just dirt — it's made from tiny broken-down bits of rock mixed with dead leaves and other organic material?