KS3 CIE Ecosystems: Sentence Completion | KS3 CIE 生态系统：句子补全

📚 KS3 CIE Ecosystems: Sentence Completion | KS3 CIE 生态系统：句子补全

Sentence completion is a core skill in KS3 CIE Ecosystems revision. It checks whether you can use key scientific terms accurately in context. This article gives you a set of fill-in-the-gap statements with answers, paired with quick notes in both English and Chinese.

句子补全是 KS3 CIE 生态系统复习中的核心技能，考查你是否能在语境中准确使用关键科学术语。本文提供一组填空句子及答案，并配有中英文对照的快速笔记。

1. What Is an Ecosystem? | 什么是生态系统？

An ecosystem is a natural unit made up of all the living organisms in a particular area, together with the non-living parts of their environment. Complete the sentence: “An ecosystem consists of ________ factors and ________ factors.”

生态系统是一个自然单位，由某一特定区域内的所有生物以及环境中的非生物部分组成。补全句子：”生态系统由____因素和____因素组成。” 答案：生物（biotic）和非生物（abiotic）因素。

Biotic factors are the living parts such as plants, animals, fungi and bacteria. Abiotic factors are the non-living parts such as sunlight, water, temperature and soil. Complete: “Soil pH is an example of an ________ factor.”

生物因素是指植物、动物、真菌和细菌等生物部分。非生物因素是指阳光、水、温度和土壤等非生物部分。补全：”土壤 pH 是____因素的一个例子。” 答案：非生物（abiotic）。

Ecosystems can vary greatly in size, from a small pond to a large rainforest. Complete: “A rock pool containing seaweeds, crabs and snails is an example of a small ________.”

生态系统的大小可以差异很大，从小池塘到大型雨林。补全：”含有海藻、螃蟹和蜗牛的岩石池是一个小型________的例子。” 答案：生态系统（ecosystem）。

2. Habitats and Niches | 栖息地与生态位

A habitat is the place where an organism lives, such as a pond, a woodland floor or a desert. Complete the sentence: “A habitat provides an organism with food, shelter and a place to ________.”

栖息地是生物生活的地方，例如池塘、林地地表或沙漠。补全句子：”栖息地为生物提供食物、庇护所和________的地方。” 答案：繁殖（reproduce）。

A niche is the role an organism plays in its ecosystem, including what it eats and how it interacts with other species. Complete: “Two different species can share a habitat but rarely share the same ________.”

生态位是生物在其生态系统中扮演的角色，包括它吃什么以及它如何与其他物种相互作用。补全：”两个不同物种可以共享一个栖息地，但很少共享相同的________。” 答案：生态位（niche）。

For example, an earthworm’s niche includes breaking down dead leaves and aerating the soil. Complete: “An earthworm improves soil structure by ________ through the soil.”

例如，蚯蚓的生态位包括分解枯叶和使土壤通气。补全：”蚯蚓通过在土壤中________来改善土壤结构。” 答案：挖掘（burrowing）或移动（moving）。

3. Populations and Communities | 种群与群落

A population is all the organisms of one species living in the same area at the same time. Complete the sentence: “All the rabbits in a woodland make up a ________ of rabbits.”

种群是指在同一时间生活在同一区域的同一物种的全部生物。补全句子：”林地中的所有兔子构成一个兔子________。” 答案：种群（population）。

A community is all the populations of different species living and interacting in an ecosystem. Complete: “A community includes all the ________ in an area, not just one species.”

群落是指生活在同一生态系统中并相互作用的所有不同物种种群。补全：”群落包括一个区域内的所有________，而不仅仅是一个物种。” 答案：种群（populations）。

The size of a population can change due to births, deaths, immigration and emigration. Complete: “When food supply increases, a population may ________ in size.”

种群的大小会因出生、死亡、迁入和迁出而改变。补全：”当食物供应增加时，种群的大小

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