PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free ISASP Science Grade 8 Practice Questions

Prepare for the Iowa Statewide Assessment of Student Progress Science — Grade 8 exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More K-12 State Assessments

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Florida Algebra 1 End-of-Course Assessment

Practice QuestionsStudy GuideCheat SheetFlashcards1 video4 blogs

FAST ELA Reading Grade 3

Practice QuestionsStudy Guide

Florida Geometry End-of-Course Assessment

Practice Questions1 blog

ILEARN Biology End-of-Course Assessment (ECA)

Practice Questions

DC CAPE 2.0 Science — Grade 8

Practice Questions

AK STAR Mathematics Grade 9

Practice Questions

More From This Family

Videos and articles for deeper review.

VideoFailed the Florida Algebra 1 EOC? Your 2026 Graduation Decision PathArticleFlorida Algebra 1 EOC: A B.E.S.T. Standards Content Review for 202611 min readArticleFailed the Florida Algebra 1 EOC? Your 2026 Graduation Decision Path15 min readArticleFlorida Algebra 1 EOC Released Test 2026: How to Use the 2024 Exam12 min readArticleFlorida Algebra 1 EOC 2026: Passing Score, the 30% Rule, and Retake Pathways10 min read
2026 Statistics

Key Facts: ISASP Science Grade 8 Exam

ISASP Science Grade 8 is Iowa's statewide science summative on TestNav, free to students, covering Life, Physical, and Earth/Space domains with phenomena-based tasks.

Sample ISASP Science Grade 8 Practice Questions

Try these sample questions to test your ISASP Science Grade 8 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A student views onion cells under a microscope and labels a thin outer boundary around each cell. What structure is the student most likely labeling?
A.Mitochondrion
B.Nucleus
C.Chloroplast
D.Cell wall
Explanation: Plant cells have a rigid cell wall outside the cell membrane that gives shape and support. The nucleus is inside the cell; mitochondria and chloroplasts are organelles within the cytoplasm.
2Which organelle is the main site of photosynthesis in plant cells?
A.Vacuole
B.Ribosome
C.Chloroplast
D.Mitochondrion
Explanation: Chloroplasts contain chlorophyll and carry out photosynthesis, converting light energy into chemical energy in sugars. Mitochondria release energy from food; ribosomes make proteins; vacuoles store materials.
3What is the primary function of the cell membrane?
A.Store genetic instructions only
B.Give plants their green color
C.Produce all of the cell's energy
D.Control what enters and leaves the cell
Explanation: The cell membrane is selectively permeable, regulating movement of materials into and out of the cell. DNA storage is mainly nuclear; energy production is mitochondrial; green color comes from chloroplasts.
4Compared with animal cells, plant cells typically have which additional structures?
A.Nucleus and ribosomes only
B.Only a cell membrane with no organelles
C.Cell wall and chloroplasts
D.Flagella in every plant cell
Explanation: Plant cells characteristically have a cell wall and chloroplasts (and often a large central vacuole). Animal cells share nuclei and ribosomes but lack walls and chloroplasts.
5Mitochondria are often called the "powerhouses" of the cell because they
A.store water for the whole plant
B.capture sunlight for sugar production
C.package proteins for export only
D.release usable energy from food molecules
Explanation: Mitochondria carry out cellular respiration, transferring energy from food molecules into forms the cell can use (such as ATP). Water storage is vacuoles; light capture is chloroplasts; protein packaging is more associated with the Golgi apparatus.
6In an ecosystem food chain, producers are organisms that
A.only eat other animals
B.never interact with consumers
C.break down dead material and nothing else
D.make their own food, often using sunlight
Explanation: Producers (autotrophs) make their own food, typically through photosynthesis. Consumers eat other organisms; decomposers recycle dead matter; producers interact with consumers as the base of food webs.
7A hawk eats a snake that ate a mouse that ate seeds. Which organism is a producer in this chain?
A.The snake
B.The hawk
C.The plant that made the seeds
D.The mouse
Explanation: Producers are plants (or other autotrophs) that make food. Seeds come from producer plants; the hawk, snake, and mouse are consumers at different levels.
8What do decomposers mainly contribute to an ecosystem?
A.They produce all oxygen for the planet alone
B.They stop plants from growing
C.They recycle nutrients by breaking down dead organisms
D.They prevent any energy from leaving the system
Explanation: Decomposers break down dead organisms and waste, returning nutrients to soil and water for producers. Oxygen production is mainly photosynthesis; energy flows and is lost as heat; decomposers support plant growth by recycling nutrients.
9Heredity is best described as the
A.passing of traits from parents to offspring
B.breaking down of food in the stomach
C.movement of animals to new habitats only
D.formation of rocks from magma
Explanation: Heredity is the transmission of genetic traits from parents to offspring. Migration, digestion, and rock formation are different processes.
10Where is the genetic information of a eukaryotic cell mainly stored?
A.Only in the large vacuole
B.Only outside the cell in blood
C.In DNA within the nucleus
D.Only in the cell wall
Explanation: In eukaryotic cells, most hereditary information is DNA packaged in the nucleus (mitochondria and chloroplasts hold smaller genomes, but the nucleus is primary). Cell walls, vacuoles, and extracellular fluids are not the main storage of the genome.

About the ISASP Science Grade 8 Exam

The Iowa Statewide Assessment of Student Progress (ISASP) Science — Grade 8 is Iowa's statewide summative science assessment developed by Iowa Testing Programs. Science is assessed statewide in grades 5, 8, and high school (grade 11 beginning 2026–27). Items are phenomena-based and aligned to three-dimensional Iowa science standards across Life, Physical, and Earth/Space domains. OpenExamPrep offers free English multiple-choice practice aligned to those domains as a study aid—not official items or a substitute for investigations, modeling, constructed responses, or the official assessment.

Questions

32 scored questions

Time Limit

Untimed. District communications commonly schedule about 60–75 minutes for science sessions; official specifications describe ISASP as untimed with recommended administration times for planning.

Passing Score

Science continues prior reporting through spring 2026 administrations; ISASP will report four performance levels (Below, Approaching, Meeting, Exceeding) for Science after the spring 2027 administration (ITP/Pearson bulletin, Changes with ISASP Reporting for 2026).

Exam Fee

Free to students and families; ISASP is Iowa's state-funded statewide summative assessment administered through public schools and ESA-funded nonpublic schools. (Iowa Department of Education; Iowa Testing Programs (University of Iowa); delivered via Iowa Testing Programs (University of Iowa) with Pearson (TestNav / PearsonAccessnext))

ISASP Science Grade 8 Exam Content Outline

about 25–45%

Life Science

Molecules and organisms, ecosystems, heredity, and biological evolution (Iowa Core science domains).

about 25–45%

Physical Science

Matter and its interactions, motion and stability, energy, and waves.

about 25–45%

Earth and Space Sciences

Earth's place in the universe, Earth's systems, and Earth and human activity.

How to Pass the ISASP Science Grade 8 Exam

What You Need to Know

  • Passing score: Science continues prior reporting through spring 2026 administrations; ISASP will report four performance levels (Below, Approaching, Meeting, Exceeding) for Science after the spring 2027 administration (ITP/Pearson bulletin, Changes with ISASP Reporting for 2026).
  • Exam length: 32 questions
  • Time limit: Untimed. District communications commonly schedule about 60–75 minutes for science sessions; official specifications describe ISASP as untimed with recommended administration times for planning.
  • Exam fee: Free to students and families; ISASP is Iowa's state-funded statewide summative assessment administered through public schools and ESA-funded nonpublic schools.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

ISASP Science Grade 8 Study Tips from Top Performers

1Study phenomena with all three dimensions: disciplinary core ideas, science and engineering practices, and crosscutting concepts.
2Use official ISASP science practice tests on the ISASP Portal to learn item clusters and tools.
3Balance Life, Physical, and Earth/Space practice roughly evenly (each domain is targeted ~25–45%).
4Explain claims with evidence and reasoning rather than memorizing isolated facts.
5Review graphs, models, and data tables—many items require interpretation, not recall alone.
6Build stamina with untimed multi-item science clusters.

Frequently Asked Questions

What is the ISASP Science assessment for Grade 8?

It is Iowa's statewide summative science assessment for Grade 8, developed by Iowa Testing Programs and aligned to Iowa science standards across Life, Physical, and Earth and Space Sciences.

Who takes ISASP Science?

Students in the required science grades take ISASP Science unless they qualify for the DLM alternate assessment. For 2026–27 the required grades are 5, 8, and 11.

How many questions are on the official ISASP Science test?

Official ISASP Science is a 32-item test at each assessed grade. The current ISASP Science Test Specifications set the Total Number of Items per Test at 32 and distribute them across three reporting domains — Life Science, Physical Science, and Earth and Space Sciences — each targeted at 25–45% of the test (8–14 operational items) and delivered in clusters of 3–5 items built on a shared phenomenon. Iowa Testing Programs has announced that updated Science test specifications and blueprints for the 2027 ISASP will be published later in 2026, so the grade-11 counts are not yet set. Do not treat practice-bank length as the official count. Science is assessed statewide in grades 5, 8, and high school (grade 11 beginning 2026–27).

Is ISASP Science timed?

No. ISASP is untimed; schools use recommended session lengths for scheduling.

What score is considered meeting expectations?

Science continues prior reporting through spring 2026 administrations; ISASP will report four performance levels (Below, Approaching, Meeting, Exceeding) for Science after the spring 2027 administration (ITP/Pearson bulletin, Changes with ISASP Reporting for 2026).

Are these practice questions the real ISASP exam?

No. These free multiple-choice practice questions are a study aid aligned to Iowa science domains. They are not official ISASP items and do not replace phenomena analysis, scientific modeling, investigations, constructed responses, or the official assessment.