100+ Free CCRA Science Grade 11 Practice Questions

Prepare for the Oklahoma College- and Career-Readiness Assessment: Science Content, Grade 11 exam with instant access — no signup required.

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Oklahoma CCRA U.S. History — Grade 11

Practice Questions100 questions

2026 Statistics

Key Facts: CCRA Science Grade 11 Exam

OSDE

Administering agency

Oklahoma State Department of Education

Cognia

Testing vendor

CCRA Test Administration Manual 2025-26

20 (+2 field test)

Operational clusters

CCRA Science Content Test Blueprint

2 — Physical and Life Sciences

Reporting categories

CCRA Science Content Test Blueprint

OPI 200-399; 300 = Proficient

Score scale

OSDE Understanding OSTP Results

Practise for the Oklahoma CCRA Grade 11 Science test with 100 free questions split evenly between Physical Sciences and Life Sciences — the only two reporting categories on the official blueprint. This English-language MCQ bank is a study aid, not a cluster-format simulation.

Sample CCRA Science Grade 11 Practice Questions

Try these sample questions to test your CCRA Science Grade 11 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A chemistry student balances the reaction between propane and oxygen gas: C3H8 + x O2 -> 3 CO2 + 4 H2O. What stoichiometric coefficient x is required to balance the oxygen atoms on both sides of the equation?

A.5

B.3

C.4

D.10

Explanation: The products contain a total of 10 oxygen atoms (3 CO2 provides 6 O atoms and 4 H2O provides 4 O atoms). To supply 10 oxygen atoms from diatomic oxygen (O2), the coefficient x must be 5.

2In an experiment, 2.0 moles of hydrogen gas (H2) react completely with excess nitrogen gas to produce ammonia according to N2 + 3 H2 -> 2 NH3. How many moles of NH3 are produced?

A.1.33 moles

B.2.0 moles

C.3.0 moles

D.0.67 moles

Explanation: According to the balanced equation, 3 moles of H2 produce 2 moles of NH3. Multiplying 2.0 moles H2 by (2 moles NH3 / 3 moles H2) gives 1.33 moles of NH3.

3A student mixes aqueous sodium hydroxide (NaOH) and hydrochloric acid (HCl) in a calorimeter. The temperature of the solution increases from 21.5°C to 28.2°C. How should this chemical reaction be classified?

A.Exothermic reaction because thermal energy is released to the solution

B.Endothermic reaction because thermal energy is absorbed by the reactants

C.Decomposition reaction because thermal energy breaks bonds down

D.Precipitation reaction because temperature change creates a solid phase

Explanation: An exothermic neutralization reaction releases heat energy during bond formation, increasing the temperature of the surrounding aqueous solution.

4Which of the following changes will increase the rate of reaction between solid calcium carbonate marble chips (CaCO3) and hydrochloric acid (HCl)?

A.Crushing the marble chips into fine powder to increase surface area

B.Cooling the hydrochloric acid solution in an ice bath

C.Diluting the hydrochloric acid solution with distilled water

D.Increasing the overall volume of the reaction container without adding reactants

Explanation: Crushing solid reactants into fine powder increases surface area exposure, allowing more frequent collisions between reactant particles and speeding up the reaction rate.

5According to the Law of Conservation of Mass, what must be true about a closed system during a synthesis reaction between iron and sulfur (Fe + S -> FeS)?

A.The total mass of iron sulfide produced equals the combined mass of iron and sulfur reacted

B.The total mass of the system increases because a compound is formed

C.The total mass decreases because energy is converted into mass

D.The mass of iron decreases while the mass of sulfur triples during bonding

Explanation: The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. Therefore, the total product mass equals the total reactant mass consumed.

6Consider the synthesis of aluminum oxide: 4 Al + 3 O2 -> 2 Al2O3. If 12.0 moles of Al react with excess O2, how many moles of Al2O3 are produced?

A.6.0 moles

B.12.0 moles

C.8.0 moles

D.4.0 moles

Explanation: The mole ratio between Al and Al2O3 is 4:2 (or 2:1). Calculating 12.0 moles Al * (2 moles Al2O3 / 4 moles Al) yields 6.0 moles of Al2O3.

7A researcher places a catalyst into a reaction flask containing hydrogen peroxide (H2O2) decomposing into water and oxygen gas. How does the catalyst increase the reaction rate?

A.It lowers the activation energy required for the reaction to proceed

B.It increases the enthalpy change (Delta H) of the reaction

C.It raises the temperature of the liquid solution internally

D.It acts as a reactant that is permanently consumed in the product formation

Explanation: A catalyst speeds up a reaction by providing an alternative reaction pathway with a lower activation energy, allowing a greater fraction of collisions to result in product formation.

8When potassium chlorate decomposes upon heating (2 KClO3 -> 2 KCl + 3 O2), a student collects 0.60 moles of O2 gas. How many moles of KClO3 were decomposed?

A.0.40 moles

B.0.60 moles

C.0.90 moles

D.0.30 moles

Explanation: The stoichiometric ratio between KClO3 and O2 is 2:3. Calculating 0.60 moles O2 * (2 moles KClO3 / 3 moles O2) gives 0.40 moles of KClO3.

9Which molecular dynamic explanation best describes why increasing the temperature of a gas sample accelerates its chemical reaction rate?

A.Gas molecules move faster, increasing collision frequency and the percentage of collisions exceeding activation energy

B.Higher temperature increases the molar mass of the gas molecules, making collisions more forceful

C.Thermal expansion reduces the number of valence electrons required to form covalent bonds

D.Heating converts non-polar covalent gas molecules into ionic species spontaneously

Explanation: Increasing temperature increases the average kinetic energy of molecules, causing them to collide more frequently and with sufficient kinetic energy to overcome the activation energy barrier.

10A 100 g block of aluminum at 90°C is dropped into 100 g of water at 20°C inside a calorimeter. The specific heat capacity of water is 4.18 J/g°C, while aluminum is 0.90 J/g°C. What will occur as thermal equilibrium is reached?

A.The final temperature will be much closer to 20°C than to 90°C because water has a significantly higher specific heat capacity

B.The final temperature will be exactly 55°C because the masses of aluminum and water are equal

C.The final temperature will be closer to 90°C because metal conducts heat faster than liquid water

D.Heat will flow from the water to the aluminum until both reach 0°C

Explanation: Water has a much higher specific heat capacity than aluminum (4.18 vs 0.90 J/g°C), meaning water absorbs a large amount of thermal energy with a relatively small temperature increase.

About the CCRA Science Grade 11 Exam

The CCRA Science Content assessment is Part 2 of Oklahoma's Grade 11 College- and Career-Readiness Assessment, alongside the CCRA U.S. History Content test; Part 1 is the ACT including the writing section. It measures proficiency against the Oklahoma Academic Standards for Science using phenomenon-based clusters, drawing entirely on high-school Physical Science (PS) and Biology (B) standards.

Assessment

Online cluster-based test delivered in two sections. Each cluster aligns to one Oklahoma Academic Standard with its Disciplinary Core Idea(s), Science and Engineering Practice and Crosscutting Concept. Blueprint: Physical Sciences 45-55% and Life Sciences 45-55% — the only two reporting categories.

Time Limit

Approximately 195 minutes across two sections of 65-85 minutes each (suggested maximum 390 minutes); not strictly timed

Passing Score

No pass/fail mark. Reported on the Oklahoma Performance Index (OPI) 200–399 scale, where 300 is always Proficient, in four performance levels: Below Basic, Basic, Proficient, Advanced.

Exam Fee

No fee to students (Oklahoma State Department of Education (OSDE); delivered under contract by Cognia)

CCRA Science Grade 11 Exam Content Outline

45-55%

Physical Sciences

Periodic-table patterns and electron structure, chemical reactions and reaction rate, conservation of mass, electromagnetic induction, energy transfer and computational energy models, the second law of thermodynamics, wave frequency-wavelength-speed relationships, and effects of electromagnetic radiation (PS.PS1, PS.PS2.5, PS.PS3, PS.PS4).

45-55%

Life Sciences

DNA and protein structure, hierarchical organization of body systems, homeostasis, mitosis and differentiation, sources of inheritable genetic variation, statistics and probability applied to traits, evidence for common ancestry, biodiversity, natural selection and adaptation, and species change or extinction (B.LS1, B.LS3, B.LS4).

How to Pass the CCRA Science Grade 11 Exam

What You Need to Know

Passing score: No pass/fail mark. Reported on the Oklahoma Performance Index (OPI) 200–399 scale, where 300 is always Proficient, in four performance levels: Below Basic, Basic, Proficient, Advanced.
Assessment: Online cluster-based test delivered in two sections. Each cluster aligns to one Oklahoma Academic Standard with its Disciplinary Core Idea(s), Science and Engineering Practice and Crosscutting Concept. Blueprint: Physical Sciences 45-55% and Life Sciences 45-55% — the only two reporting categories.
Time limit: Approximately 195 minutes across two sections of 65-85 minutes each (suggested maximum 390 minutes); not strictly timed
Exam fee: No fee to students

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

CCRA Science Grade 11 Study Tips from Top Performers

1The blueprint is an even split, so give Physical Sciences and Life Sciences roughly equal study time.

2For physical science, work on periodic trends and electron configuration, balancing reactions and conservation of mass, factors that change reaction rate, and energy transfer under the second law of thermodynamics.

3Practise the wave relationship v = f x λ and be able to explain how different frequencies of electromagnetic radiation interact with matter.

4For life science, focus on DNA to protein, homeostasis, mitosis and differentiation, and the three sources of inheritable variation: meiosis, replication errors and environmental mutagens.

5Practise interpreting data tables and graphs to justify claims about natural selection, biodiversity and trait frequency — the test is evidence-based rather than recall-based.

Frequently Asked Questions

What is the Oklahoma CCRA?

The College- and Career-Readiness Assessment is Oklahoma's required Grade 11 assessment. Part 1 is the ACT including the writing section. Part 2 is a state-developed Science Content test and a U.S. History Content test aligned to the Oklahoma Academic Standards.

How many questions are on the CCRA Science test?

The operational test contains 20 clusters plus 2 field-test clusters. Each cluster carries three items, so there are roughly 60 operational items.

Does the CCRA Science test cover Earth and space science?

No. The official blueprint lists only two reporting categories — Physical Sciences at 45-55% and Life Sciences at 45-55%. Earth and space science is assessed in Grades 5 and 8, not on the Grade 11 CCRA Science test.

Is a calculator allowed?

Yes. For Part 2 Science Content, graphing and/or scientific calculators meeting the OSTP general requirements are allowed. Part 1 follows the ACT's own calculator policy.

Is the CCRA Science test available in Spanish?

Yes. Cognia offers a Spanish online form of the CCRA Science and U.S. History Content tests, along with Spanish text-to-speech; students must be scheduled for the Spanish test.