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Washington Grade 7 Science
Connect gas exchange, circulation, and body cells in a subsystem model, using worked reasoning and a selected Washington middle-school science reference.
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Standards source: Washington science standards.
Explain Interacting Body Subsystems
Connect gas exchange, circulation, and body cells in a subsystem model, using worked reasoning and a selected Washington middle-school science reference.
The Washington science directory identifies the Next Generation Science Standards and their three dimensions. This activity selects a reference from the OSPI-linked NGSS DCI arrangements, September 2017 edition. Check the school’s curriculum sequence and the complete chosen requirement. The selected MS expectation belongs to the Grades 6–8 band. The school determines its grade placement and sequence. It is one part of a science course, not a complete curriculum.
The Washington science standards combine science and engineering practices, disciplinary core ideas, and crosscutting concepts. Connect all three dimensions when reading the complete performance expectation. Use the school’s course sequence to plan other investigations, models, and explanations. The general lesson library below may include review or enrichment beyond this grade’s course. This original activity is a focused starting point, not a complete curriculum crosswalk.
Different roles in one connected system
A teacher’s conceptual model shows oxygen entering the lungs, passing into the blood, and being carried to body cells, including muscle cells. A student labels the respiratory and circulatory systems “independent” because their organs have different jobs. Use the model to evaluate that label and explain how cells, tissues, and organs fit the account.
Explain the evidence or model
Different jobs do not make the systems independent. In the supplied model, the respiratory system makes the exchange with the blood possible, while the circulatory system carries oxygen to cells elsewhere in the body. That connection supports an argument for interacting subsystems. Muscle cells are part of tissues that make up muscles; organs themselves contain organized tissues made of specialized cells. Thus the explanation should connect organization within the body with exchanges between subsystems. A lung is not a single cell, and blood transport is not the same job as gas exchange. Use each role and the connection between them as evidence rather than listing system names without relationships.
| Part of model | Selected role | Connection |
|---|---|---|
| Lungs | Gas exchange with blood | Respiratory system connects with circulation |
| Blood circulation | Transport to and from body cells | Links organs with cells elsewhere |
| Muscle cells | Cells organized within tissues | Receive transported materials |
What to check in the explanation
This is a simplified instructional model of a multicellular human body, not medical advice or a physiological measurement. It omits many structures and mechanisms. The selected reference emphasizes conceptual relationships; this example does not trace every interaction or disease response.
Plan the next activity
- Distinguish gas exchange from transport.
- Connect specialized cells, tissues, organs, and subsystems.
- Add the carbon-dioxide connection to the model.
Add an arrow showing that carbon dioxide is carried from body cells toward the lungs in the blood. Explain how this additional connection strengthens the subsystem account without treating the circulatory system as the site of breathing itself.
Grade 7 Science: Learn, Practice, and Quiz
Read a short lesson, work through its example, and try a related science-area quiz. States organize these ideas differently; use your state standards to choose what matches your class.
Physical Science
Life Science
Earth & Space
Washington Science by Grade
Browse Washington science pages by grade.
Start With a Practice Test
These independently published practice sets open on this page. Check their directions and topic coverage alongside current Washington assessment guidance. Use their feedback alongside classroom work; they are not official Washington assessments or a certified match to the full course.
Washington Grade 7 Science Practice Test 1
An independently published practice set across a range of science topics.
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Washington Grade 7 Science Practice Test 2
Another independent practice set to discuss alongside lessons.
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Washington Grade 7 Science Practice Test 3
Practice interpreting observations, models, and explanations.
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Washington Grade 7 Science Practice Test 4
Another independently published practice set with a built-in timer.
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Washington Grade 7 Science Practice Test 5
Another independent mixed practice set to review alongside classroom work.
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Washington Grade 7 Science Practice Test 6
Use another independent practice set and examine its feedback alongside classroom work.
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Grade 7 Science Skill Quizzes
Choose a science-area quiz after studying its related lesson. These independent resources may include topics beyond this grade’s expectations; use the Washington science standards and the school’s course plan to select suitable practice.
Matter and Its Properties
Independent practice on matter and its properties. Follow the resource’s directions and review its feedback alongside classroom work.
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Forces and Motion
Independent practice on forces and motion. Follow the resource’s directions and review its feedback alongside classroom work.
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Energy
Independent practice on energy. Follow the resource’s directions and review its feedback alongside classroom work.
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Waves and Information
Independent practice on waves and information. Follow the resource’s directions and review its feedback alongside classroom work.
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Cells, Structures and Life Processes
Independent practice on cells, structures and life processes. Follow the resource’s directions and review its feedback alongside classroom work.
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Ecosystems and Heredity
Independent practice on ecosystems and heredity. Follow the resource’s directions and review its feedback alongside classroom work.
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Evolution, Fossils and Adaptation
Independent practice on evolution, fossils and adaptation. Follow the resource’s directions and review its feedback alongside classroom work.
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Earth and Space Systems
Independent practice on earth and space systems. Follow the resource’s directions and review its feedback alongside classroom work.
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Earth, Human Activity and Engineering
Independent practice on earth, human activity and engineering. Follow the resource’s directions and review its feedback alongside classroom work.
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Grade 7 Science Study Tools
A few minutes of review between practice tests. Both open right here.
Grade 7 Science Flashcards
Review terms in this independently published deck. Use the classroom’s vocabulary and reading level to decide which entries need practice.
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Grade 7 Science Quick Review
Use this concise review alongside observations, lessons, and the complete Washington science standards document. Add course topics that need further explanation.
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Middle-school science topic navigator for Grade 7 study
Use these brief labels as a study navigator, not as full standards or a certified alignment map. These ideas draw from the Grades 6–8 band; the school sets its course sequence. Read the complete Washington science standards document for official requirements.
PS Physical Sciences
- Particles, Atoms, Elements, and Compounds
- Material Properties and Uses
- Energy Forms, Transfer, and Transformation
- Chemical and Physical Changes
- Forces, Motion, and Interactions
- Gravity and Object Motion
- Scientific Tools, Measurement, and Data Displays
- Matter Properties, States, and Classification
- Light, Sound, and Wave Behavior
- Compare digital and analog signal transmission
LS Life Sciences
- Cells, Body Systems, and Genetics
- Organism Needs, Structures, and Life Cycles
- How sensory information supports behavior and memory
- Ecosystems, Food Webs, and Matter Flow
- Compare designs that protect biodiversity and ecosystem services
- Earth Materials, Rocks, Fossils, and Landforms
- Compare patterns in organism development
ESS Earth and Space Sciences
- Sun, Moon, Earth, Stars, and Space Systems
- Earth Materials, Rocks, Fossils, and Landforms
- Use evidence to explain changes to Earth’s surface
- Natural Resources and Human Impacts
- Use air-mass data to explain weather changes
- Water Cycle, Weather, Climate, and Atmosphere
- Scientific Questions, Investigations, and Evidence
- Use natural-hazard records to plan risk reduction
ETS Engineering, Technology, and Applications of Science
- Engineering Design and Solution Evaluation
Washington Grades 6–8 band references for this investigation
These selected references support the activity’s focus. Read the complete Washington science standards expectation in the linked document, including the stated practices, core ideas, crosscutting concepts, and relevant engineering expectations, alongside the school’s course sequence. The MS codes are middle-school requirements, not a separate complete list assigned to this grade.
| Reference | Selected focus | Washington science standards document |
|---|---|---|
| MS-LS1-3 | Explain Interacting Body Subsystems | Read page 58 |
Washington Grade 7: Math and English Too
Science is part of the Washington grade 7 subject collection. Use the related subject pages to organize cross-subject study.
Washington Grade 7 Math
Explore practice, printable resources, and lessons for Washington Grade 7 math.
Open the math center →Washington Grade 7 English
Reading, writing, and language standards for Washington grade 7, organized with selected activities and references.
Open the English center →Washington Grade 7 Science: useful planning questions
How does Grade 7 connect to Washington’s science assessment?
OSPI lists the Washington Comprehensive Assessment of Science (WCAS) in Grades 5, 8, and 11. Grade 7 is outside those listed general science testing grades. WA-AIM has separate participation guidance. Follow the school’s current directions and use classroom observations and explanations. Independently published practice has its own tools, timing, questions, and scoring; it is not an official state assessment. Read the official guidance.
Do different organ functions make body systems independent?
No. A model should explain how their different functions interact. Naming organs without their connections leaves out the system relationship.
Where should I check the complete science requirements?
Read OSPI’s science page and the complete Washington grade or middle-school-band expectation, including the stated practices, core ideas, crosscutting concepts, and relevant engineering expectations. This activity covers one selected focus, not the complete course. Read the official guidance.
State sources checked October 6, 2026. Read the Washington assessment directory for later guidance.
Grade 7 Science in Other States
Standards, practice tests, and quizzes for grade 7 science in every state and Washington, D.C.
Choose useful science practice
Match the available task to the unit being taught. Discuss the evidence and explanation alongside classroom work; an independent practice score does not establish complete course coverage or state-assessment readiness.
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Washington Grade 7 Science: study questions
How does Grade 7 connect to Washington’s science assessment?
OSPI lists the Washington Comprehensive Assessment of Science (WCAS) in Grades 5, 8, and 11. Grade 7 is outside those listed general science testing grades. WA-AIM has separate participation guidance. Follow the school’s current directions and use classroom observations and explanations. Independently published practice has its own tools, timing, questions, and scoring; it is not an official state assessment.
Official source ↗Do different organ functions make body systems independent?
No. A model should explain how their different functions interact. Naming organs without their connections leaves out the system relationship.
Where should I check the complete science requirements?
Read OSPI’s science page and the complete Washington grade or middle-school-band expectation, including the stated practices, core ideas, crosscutting concepts, and relevant engineering expectations. This activity covers one selected focus, not the complete course.
Official source ↗Resources from Effortless Math · Editorial standards · Test details checked October 5, 2026