In science class, Ms. Chen described an ecosystem as a community where living things interact. She gave an example of a pond. Algae grew near the surface, small fish ate the algae, and larger fish ate the small fish. Frogs rested on lily pads and snapped at insects. Ms. Chen said the pond stayed balanced when each plant and animal had what it needed. What is the meaning of ecosystem as used in this context?
- a single animal's sleeping place
- a group of living things and their environment (correct answer)
- a tool used to measure water temperature
- a rule that only fish can live in ponds
Explanation: This question tests ISEE Lower Level reading comprehension, specifically understanding vocabulary in context. Vocabulary in context means identifying the word's meaning based on surrounding text. Context clues like synonyms, examples, or restatements help determine this meaning. In this passage, the word 'ecosystem' is defined as 'a community where living things interact' and illustrated through the pond example showing algae, fish, frogs, and insects all interacting together. Choice B is correct because it matches the meaning suggested by the context clues provided ('a group of living things and their environment'). Choices A, C, and D are incorrect because they focus on single elements (one animal's sleeping place), tools (measuring device), or restrictive rules rather than the interconnected community described. Teach students to look for context clues such as definitions, examples, and restatements. When teachers provide definitions followed by detailed examples, students should combine both to understand the complete meaning.