Earth’s Spheres & System Interactions — Practice · Grade 6 Science

Chapter: Earth Systems, Plates & Earth Materials

What this practice covers

By the end of Earth’s Spheres & System Interactions you should be able to:

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

Vocabulary used: geosphere, biosphere, evidence, system boundary, uncertainty.

Problem 1

Can one observation involve more than one sphere?
Answer and explanation

Yes. The categories help describe components, while a process can connect several systems simultaneously.

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

Problem 2

What should an arrow from soil to a plant identify?
Answer and explanation

Water uptake or another specified material/process, rather than an unexplained arrow that could mean anything.

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

Problem 3

Why distinguish matter and energy arrows?
Answer and explanation

They explain different quantities and processes. An unlabeled single arrow can blur material transport with the energy driving it.

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

Problem 4

Does one bare patch predict an exact sediment amount?
Answer and explanation

No. It suggests a mechanism to investigate, but numerical prediction needs site conditions and measurements.

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: Account for the water and connect at least three spheres with labeled processes. Include relevant evidence and one method or model limit.
Answer and explanation

25 + 20 + 5 + 10 = 60 mL, accounting for the stated arrival. Rain connects atmosphere and hydrosphere; infiltration connects water with geosphere; leaf interception involves biosphere. Later evaporation, drainage, or uptake is not quantified, so this is a short-interval record rather than a complete annual account.

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 model shows only land and water. Can it fully explain plant growth and evaporation? Give a reason and a relevant qualification.
Answer and explanation

Not without adding relevant organisms, gases, energy, and processes. It may answer a narrower location question while omitting relationships needed for those changes.

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 geosphere in Earth’s Spheres & System Interactions?
  1. geosphere: Earth’s rocky material, landforms, and interior in a system model.
  2. Earth’s spheres are independent sealed boxes.
  3. Every arrow in a system model represents the same kind of transfer.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

geosphere: Earth’s rocky material, landforms, and interior in a system model.

Earth’s rocky material, landforms, and interior in a system model. 25 + 20 + 5 + 10 = 60 mL, accounting for the stated arrival. Rain connects atmosphere and hydrosphere; infiltration connects water with geosphere; leaf interception involves biosphere. Later evaporation, drainage, or uptake is not quantified, so this is a short-interval record rather than a complete annual account.

Problem 8

Which statement correctly uses biosphere in Earth’s Spheres & System Interactions?
  1. Earth’s spheres are independent sealed boxes.
  2. biosphere: Living organisms and their biological relationships within Earth’s systems.
  3. Every arrow in a system model represents the same kind of transfer.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

biosphere: Living organisms and their biological relationships within Earth’s systems.

Living organisms and their biological relationships within Earth’s systems. 25 + 20 + 5 + 10 = 60 mL, accounting for the stated arrival. Rain connects atmosphere and hydrosphere; infiltration connects water with geosphere; leaf interception involves biosphere. Later evaporation, drainage, or uptake is not quantified, so this is a short-interval record rather than a complete annual account.

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