Ecosystems, Habitats & Biomes — Practice · Grade 6 Science

Chapter: Ecosystems, Watersheds & Conservation

What this practice covers

By the end of Ecosystems, Habitats & Biomes you should be able to:

8 questions, written answer and multiple choice, each with a worked explanation.

Vocabulary used: habitat, species richness, evidence, system boundary, uncertainty.

Problem 1

Why should nonliving conditions be included?
Answer and explanation

They influence resources and processes, so the organism list alone cannot explain the ecosystem’s relationships.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 2

Can a biome name replace a local habitat observation?
Answer and explanation

No. It supplies broad context, while local conditions need their own evidence.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 3

What additional comparison would improve the inference?
Answer and explanation

Use comparable soil and sampling conditions, repeated observations, and moisture records while evaluating other differences.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 4

Why does the boundary matter?
Answer and explanation

It determines which conditions, interactions, and movements the study includes and limits the population-level conclusion.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 5

Develop a complete response: Compare richness and abundance, then explain one limit to a habitat-quality judgment. Include relevant evidence and one method or model limit.
Answer and explanation

The shaded patch has greater recorded species richness, while the sunny patch has more recorded individuals. Neither measure alone proves a universally better habitat. Species identity, seasonal changes, detection, and the needs of a particular organism matter. These are illustrative patch records, not a survey of every forest.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 6

Apply the unit independently: A bird uses nesting cover in one patch and feeds in another. Must its habitat be one small fixed box? Give a reason and a relevant qualification.
Answer and explanation

No. Habitat use can span several features and locations. The study boundary should match the question rather than assume the organism never moves.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 7

Which statement correctly uses habitat in Ecosystems, Habitats & Biomes?
  1. A biome label establishes identical conditions at every site.
  2. More individuals always means more species.
  3. habitat: The setting and conditions an organism uses to live and obtain resources.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

habitat: The setting and conditions an organism uses to live and obtain resources.

The setting and conditions an organism uses to live and obtain resources. The shaded patch has greater recorded species richness, while the sunny patch has more recorded individuals. Neither measure alone proves a universally better habitat. Species identity, seasonal changes, detection, and the needs of a particular organism matter. These are illustrative patch records, not a survey of every forest.

Problem 8

Which statement correctly uses species richness in Ecosystems, Habitats & Biomes?
  1. One illustrative result establishes every real condition and needs no further evidence.
  2. More individuals always means more species.
  3. A biome label establishes identical conditions at every site.
  4. species richness: The number of different species recorded under a stated method.
Answer and explanation

species richness: The number of different species recorded under a stated method.

The number of different species recorded under a stated method. The shaded patch has greater recorded species richness, while the sunny patch has more recorded individuals. Neither measure alone proves a universally better habitat. Species identity, seasonal changes, detection, and the needs of a particular organism matter. These are illustrative patch records, not a survey of every forest.

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