Class 9 Science Quiz

Science MCQ Questions for Class 9

Practice Class 9 Science MCQ questions with answers, explanations and level-wise revision. Start from Easy levels and move toward Expert practice when your accuracy improves.

Class 9 Science Summary

Class 9 Science MCQ questions with answers, chapter wise quiz, topic wise practice, objective questions, exam revision aur answer explanation ke liye ye page banaya gaya hai. Important chapters include Exploration: Entering the World of Secondary Science, Cell: The Building Block of Life, Tissues in Action. Focus topics include Nature and meaning of science, Scientific questions and observations, Hypothesis and experimentation, Variables in an experiment.

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Class 9 Science MCQ Questions with Answers

Class 9 Science ke liye chapter wise MCQ questions, topic wise practice, objective questions, quiz levels, correct answers aur simple explanations ek hi page par available hain. Students board exam revision, school test preparation, daily practice aur concept clarity ke liye yahan se focused practice start kar sakte hain.

Science MCQ Class 9 Science Questions Chapter Wise Quiz Topic Wise Practice Answers and Explanations Easy to Expert Levels
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Science Chapters for Class 9

Choose a Science chapter to practice focused MCQs with topic-wise revision, answers and explanations for Class 9. Chapters include Exploration: Entering the World of Secondary Science, Cell: The Building Block of Life, Tissues in Action, Describing Motion Around Us. Topics include Nature and meaning of science, Scientific questions and observations, Hypothesis and experimentation, Variables in an experiment, Discovery of the cell.

1 Exploration: Entering the World of Secondary Science Science Exploration: Entering the World of Secondary Science MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Nature and meaning of science600 Q 2Scientific questions and observations555 Q 3Hypothesis and experimentation600 Q 4Variables in an experiment400 Q 5Measurement and scientific units 6Recording and analysing data 7Scientific communication 8Relationship of science with mathematics, technology and society 9Scientific अवलोकन लिखते समय छात्र को क्या नहीं करना चाहिए?3 Q Easy 568 Medium 591 Hard 550 Expert 449 2158 MCQs
2 Cell: The Building Block of Life Science Cell: The Building Block of Life MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Discovery of the cell 2Cell theory 3Structure of plant and animal cells 4Cell membrane and cell wall 5Cytoplasm and nucleus 6Mitochondria 7Endoplasmic reticulum 8Golgi apparatus 9Ribosomes 10Lysosomes 11Vacuoles and chloroplasts 12Prokaryotic and eukaryotic cells 13Movement of substances across the cell membrane Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
5 Exploring Mixtures and Their Separation Science Exploring Mixtures and Their Separation MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Pure substances and mixtures 2Homogeneous and heterogeneous mixtures 3Solutions 4Solute and solvent 5Concentration of a solution 6Suspensions 7Colloids 8Physical and chemical properties 9Separation by filtration and evaporation 10Centrifugation 11Crystallisation 12Distillation 13Chromatography 14Separation of components of mixtures Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
9 Atomic Foundations of Matter Science Atomic Foundations of Matter MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Laws of chemical combination 2Law of conservation of mass 3Law of constant proportions 4Atoms and molecules 5Symbols of elements 6Chemical formulae 7Atomic mass 8Molecular mass 9Formula unit mass 10Ions and ionic compounds 11Writing chemical formulae 12Mole concept 13Relationship between atoms, molecules and matter Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
10 Sound Waves: Characteristics and Applications Science Sound Waves: Characteristics and Applications MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Production of sound 2Vibrating objects 3Sound as a mechanical wave 4Propagation of sound 5Longitudinal waves 6Compressions and rarefactions 7Amplitude 8Frequency 9Time period 10Wavelength 11Speed of sound 12Loudness and pitch 13Reflection of sound 14Echo and reverberation 15Human ear 16Audible and inaudible sounds 17Ultrasound and its applications Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
11 Reproduction: How Life Continues Science Reproduction: How Life Continues MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Importance of reproduction 2Asexual reproduction 3Binary fission 4Budding 5Fragmentation 6Spore formation 7Vegetative propagation 8Sexual reproduction in plants 9Structure of a flower 10Pollination 11Fertilisation 12Seed and fruit formation 13Human reproductive system 14Puberty and adolescence 15Reproductive health Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
12 Patterns in Life: Diversity and Classification Science Patterns in Life: Diversity and Classification MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Diversity of living organisms 2Need for classification 3Basis of biological classification 4Taxonomic hierarchy 5Binomial nomenclature 6Five-kingdom classification 7Monera 8Protista 9Fungi 10Plantae 11Major plant groups 12Major animal groups 13Evolutionary relationships 14Identification and classification of organisms Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
13 Earth as a System: Energy, Matter, and Life Science Earth as a System: Energy, Matter, and Life MCQ practice for Class 9 with topic-wise questions, correct answers and simple explanations. 1Earth as an interconnected system 2Geosphere 3Hydrosphere 4Atmosphere 5Biosphere 6Cryosphere 7Interaction among Earth’s spheres 8Energy flow in Earth systems 9Matter cycles 10Water cycle 11Carbon cycle 12Weather and climate 13Natural resources 14Natural hazards 15Human impact on Earth systems 16Environmental conservation and sustainability Easy 0 Medium 0 Hard 0 Expert 0 0 MCQs
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1 Level 1 Ready 50/50 Topics in this level Nature and meaning of science50 Q 2 Level 2 Ready 50/50 Topics in this level Nature and meaning of science50 Q 3 Level 3 Ready 50/50 Topics in this level Nature and meaning of science50 Q 4 Level 4 Ready 50/50 Topics in this level Scientific questions and observations40 Q Exploration: Entering the World of Secondary Science9 Q Scientific अवलोकन लिखते समय छात्र को क्या नहीं करना चाहिए?1 Q 5 Level 5 Ready 50/50 Topics in this level Scientific questions and observations49 Q Scientific प्रश्न पूछने से पहले विषय का प्रारंभिक अवलोकन क्यों उपयोगी है?1 Q 6 Level 6 Ready 50/50 Topics in this level Scientific questions and observations49 Q Scientific जाँच में बार-बार माप लेने का मुख्य लाभ क्या है?1 Q 7 Level 7 Ready 50/50 Topics in this level Hypothesis and experimentation50 Q 8 Level 8 Ready 50/50 Topics in this level Hypothesis and experimentation50 Q 9 Level 9 Ready 50/50 Topics in this level Hypothesis and experimentation50 Q 10 Level 10 Ready 50/50 Topics in this level Variables in an experiment50 Q 11 Level 11 Ready 50/50 Topics in this level Variables in an experiment50 Q 12 Level 12 Ready 50/50 Topics in this level Variables in an experiment50 Q 13 Level 13 Locked 0/50 14 Level 14 Locked 0/50 15 Level 15 Locked 0/50 16 Level 16 Locked 0/50 17 Level 17 Locked 0/50 18 Level 18 Locked 0/50 19 Level 19 Locked 0/50 20 Level 20 Locked 0/50 21 Level 21 Locked 0/50 22 Level 22 Locked 0/50 23 Level 23 Locked 0/50 24 Level 24 Locked 0/50 25 Level 25 Locked 0/50 26 Level 26 Locked 0/50 27 Level 27 Locked 0/50 28 Level 28 Locked 0/50 29 Level 29 Locked 0/50 30 Level 30 Locked 0/50

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Question 1/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक प्रयोग में अलग-अलग भारों के कारण स्प्रिंग की लंबाई में वृद्धि मापी जाती है। यदि हर परीक्षण में अलग स्प्रिंग उपयोग किया जाए तो कौन सा चर नियंत्रित नहीं रहा?

In an experiment the increase in spring length due to different loads is measured. If a different spring is used in every trial which variable has not been controlled?

Explanation opens after your attempt
Correct Answer

B. स्प्रिंग का प्रकारType of spring

Step 1

Concept

Spring type affects stiffness and extension so the same spring should be used. Load is independent and increase in length is dependent.

Step 2

Why this answer is correct

The correct answer is B. स्प्रिंग का प्रकार / Type of spring. Spring type affects stiffness and extension so the same spring should be used. Load is independent and increase in length is dependent.

Step 3

Exam Tip

स्प्रिंग का प्रकार उसकी कठोरता और खिंचाव को प्रभावित करता है इसलिए वही स्प्रिंग उपयोग करनी चाहिए। भार स्वतंत्र और लंबाई में वृद्धि आश्रित चर है।

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Question 2/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक विद्यार्थी जाँचता है कि पंखे की गति गीले कपड़े के सूखने के समय को कैसे प्रभावित करती है। यदि कपड़ों का प्रारंभिक जल द्रव्यमान अलग-अलग हो तो क्या करना सबसे उचित है?

A student investigates how fan speed affects the drying time of wet cloth. If the initial water mass in the cloth pieces differs what is the most appropriate action?

Explanation opens after your attempt
Correct Answer

A. प्रारंभिक जल द्रव्यमान समान रखनाKeep the initial water mass the same

Step 1

Concept

Initial water mass affects drying time so it should be controlled. In a fair test change only the fan speed.

Step 2

Why this answer is correct

The correct answer is A. प्रारंभिक जल द्रव्यमान समान रखना / Keep the initial water mass the same. Initial water mass affects drying time so it should be controlled. In a fair test change only the fan speed.

Step 3

Exam Tip

प्रारंभिक जल द्रव्यमान सूखने के समय को प्रभावित करता है इसलिए उसे नियंत्रित रखना चाहिए। निष्पक्ष परीक्षण में केवल पंखे की गति बदलें।

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Question 3/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक आदर्श निष्पक्ष प्रयोग में स्वतंत्र आश्रित और नियंत्रित चरों के बीच सही संबंध कौन सा है?

In an ideal fair experiment which relationship among independent dependent and controlled variables is correct?

Explanation opens after your attempt
Correct Answer

B. स्वतंत्र चर बदला जाता है आश्रित चर मापा जाता है और अन्य प्रभावकारी चर स्थिर रखे जाते हैंThe independent variable is changed the dependent variable is measured and other influential variables are kept constant

Step 1

Concept

In a fair experiment one factor is changed its effect is measured and other influential factors are kept constant. This is the basic rule for identifying variables.

Step 2

Why this answer is correct

The correct answer is B. स्वतंत्र चर बदला जाता है आश्रित चर मापा जाता है और अन्य प्रभावकारी चर स्थिर रखे जाते हैं / The independent variable is changed the dependent variable is measured and other influential variables are kept constant. In a fair experiment one factor is changed its effect is measured and other influential factors are kept constant. This is the basic rule for identifying variables.

Step 3

Exam Tip

निष्पक्ष प्रयोग में एक कारक बदला जाता है उसका प्रभाव मापा जाता है और अन्य प्रभावकारी कारक स्थिर रखे जाते हैं। यही चर पहचानने का मूल नियम है।

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Question 4/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक छात्र तीन अलग साबुनों की सफाई क्षमता जाँचता है। प्रत्येक कपड़े पर दाग का प्रारंभिक आकार अलग है। सबसे निष्पक्ष आश्रित चर कौन सा होगा?

A student tests the cleaning ability of three soaps. The initial stain size differs on each cloth. Which would be the fairest dependent variable?

Explanation opens after your attempt
Correct Answer

B. दाग क्षेत्र में प्रतिशत कमीPercentage decrease in stain area

Step 1

Concept

When initial sizes differ percentage decrease in stain area gives a fair comparison. Final area alone may be affected by initial differences.

Step 2

Why this answer is correct

The correct answer is B. दाग क्षेत्र में प्रतिशत कमी / Percentage decrease in stain area. When initial sizes differ percentage decrease in stain area gives a fair comparison. Final area alone may be affected by initial differences.

Step 3

Exam Tip

अलग प्रारंभिक आकार होने पर दाग क्षेत्र में प्रतिशत कमी निष्पक्ष तुलना देती है। केवल अंतिम क्षेत्र प्रारंभिक अंतर से प्रभावित हो सकता है।

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Question 5/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

यदि किसी प्रयोग में स्वतंत्र चर के मान सही हैं लेकिन आश्रित चर हर बार अलग विधि से मापा जाता है तो कौन सा गुण सबसे अधिक प्रभावित होगा?

If the independent-variable values are correct but the dependent variable is measured by a different method each time which quality is most affected?

Explanation opens after your attempt
Correct Answer

A. मापन की संगतताConsistency of measurement

Step 1

Concept

Different measurement methods make results less directly comparable. The dependent variable should be measured using the same procedure each time.

Step 2

Why this answer is correct

The correct answer is A. मापन की संगतता / Consistency of measurement. Different measurement methods make results less directly comparable. The dependent variable should be measured using the same procedure each time.

Step 3

Exam Tip

अलग मापन विधियाँ परिणामों को सीधे तुलना योग्य नहीं रहने देतीं। आश्रित चर को हर बार समान प्रक्रिया से मापना चाहिए।

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Question 6/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक प्रयोग में विद्यार्थी कमरे के तापमान को स्वतंत्र चर बताता है लेकिन प्रयोग के दौरान उसे बदलता या अलग स्तरों पर निर्धारित नहीं करता। सबसे सही सुधार क्या है?

In an experiment a student calls room temperature the independent variable but does not change it or set it at different levels. What is the best correction?

Explanation opens after your attempt
Correct Answer

A. तापमान तभी स्वतंत्र चर होगा जब उसे जानबूझकर अलग स्तरों पर बदला जाएTemperature is independent only if deliberately varied at different levels

Step 1

Concept

The experimenter deliberately changes the independent variable. Merely naming a factor does not make it independent.

Step 2

Why this answer is correct

The correct answer is A. तापमान तभी स्वतंत्र चर होगा जब उसे जानबूझकर अलग स्तरों पर बदला जाए / Temperature is independent only if deliberately varied at different levels. The experimenter deliberately changes the independent variable. Merely naming a factor does not make it independent.

Step 3

Exam Tip

स्वतंत्र चर को प्रयोगकर्ता जानबूझकर बदलता है। केवल किसी कारक का नाम लिख देना उसे स्वतंत्र चर नहीं बनाता।

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Question 7/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

किस परिस्थिति में नियंत्रण समूह सबसे उपयोगी होगा?

In which situation would a control group be most useful?

Explanation opens after your attempt
Correct Answer

A. नई खाद का पौधे की वृद्धि पर प्रभाव जाँचते समय बिना खाद वाला समूह रखनाKeeping a no-fertilizer group when testing a new fertilizer

Step 1

Concept

A no-fertilizer group provides a baseline for comparison with the new fertilizer. A control group helps reveal the effect of the independent variable.

Step 2

Why this answer is correct

The correct answer is A. नई खाद का पौधे की वृद्धि पर प्रभाव जाँचते समय बिना खाद वाला समूह रखना / Keeping a no-fertilizer group when testing a new fertilizer. A no-fertilizer group provides a baseline for comparison with the new fertilizer. A control group helps reveal the effect of the independent variable.

Step 3

Exam Tip

बिना खाद वाला समूह सामान्य वृद्धि का आधार देता है जिससे नई खाद के प्रभाव की तुलना की जा सकती है। नियंत्रण समूह स्वतंत्र चर के प्रभाव को समझने में मदद करता है।

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Question 8/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक विद्यार्थी चार अलग ऊँचाइयों से गेंद गिराता है और उछाल की ऊँचाई मापता है। यदि हर बार अलग प्रकार की गेंद उपयोग हो तो सबसे उचित सुधार क्या है?

A student drops a ball from four different heights and measures bounce height. If a different type of ball is used each time what is the most appropriate improvement?

Explanation opens after your attempt
Correct Answer

A. सभी परीक्षणों में एक ही प्रकार की गेंद उपयोग करनाUse the same type of ball in all trials

Step 1

Concept

Ball type affects bounce so it should be kept constant. Drop height should remain the independent variable.

Step 2

Why this answer is correct

The correct answer is A. सभी परीक्षणों में एक ही प्रकार की गेंद उपयोग करना / Use the same type of ball in all trials. Ball type affects bounce so it should be kept constant. Drop height should remain the independent variable.

Step 3

Exam Tip

गेंद का प्रकार उछाल को प्रभावित करता है इसलिए उसे स्थिर रखना चाहिए। गिराने की ऊँचाई स्वतंत्र चर बनी रहनी चाहिए।

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Question 9/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक प्रयोग में विद्यार्थी प्रतिक्रिया समय मापने के लिए गिरते पैमाने को पकड़ने की दूरी दर्ज करता है। यह दूरी क्या है?

In an experiment a student records the distance a falling ruler travels before being caught to measure reaction time. What is this distance?

Explanation opens after your attempt
Correct Answer

A. प्रतिक्रिया समय का प्रतिनिधि आश्रित चरProxy dependent variable for reaction time

Step 1

Concept

Catch distance is used to estimate reaction time so it is a proxy dependent variable. The ruler should be released from the same position in every trial.

Step 2

Why this answer is correct

The correct answer is A. प्रतिक्रिया समय का प्रतिनिधि आश्रित चर / Proxy dependent variable for reaction time. Catch distance is used to estimate reaction time so it is a proxy dependent variable. The ruler should be released from the same position in every trial.

Step 3

Exam Tip

पकड़ने की दूरी से प्रतिक्रिया समय का अनुमान लगाया जाता है इसलिए यह प्रतिनिधि आश्रित चर है। सभी परीक्षणों में पैमाना समान स्थिति से छोड़ना चाहिए।

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Question 10/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

किस विकल्प में स्वतंत्र आश्रित और नियंत्रित चर सही क्रम में दिए गए हैं यदि उर्वरक की मात्रा का पौधे के शुष्क द्रव्यमान पर प्रभाव जाँचा जाए?

Which option lists the independent dependent and controlled variables in the correct order when testing the effect of fertilizer amount on plant dry mass?

Explanation opens after your attempt
Correct Answer

B. उर्वरक की मात्रा शुष्क द्रव्यमान पानी की मात्राFertilizer amount dry mass water amount

Step 1

Concept

Fertilizer amount is changed dry mass is measured and water amount is kept constant. This is the correct independent dependent and controlled order.

Step 2

Why this answer is correct

The correct answer is B. उर्वरक की मात्रा शुष्क द्रव्यमान पानी की मात्रा / Fertilizer amount dry mass water amount. Fertilizer amount is changed dry mass is measured and water amount is kept constant. This is the correct independent dependent and controlled order.

Step 3

Exam Tip

उर्वरक की मात्रा बदली जाती है शुष्क द्रव्यमान मापा जाता है और पानी समान रखा जाता है। यही क्रम स्वतंत्र आश्रित और नियंत्रित चर का है।

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Question 11/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक छात्र यह जाँचता है कि संगीत का प्रकार पढ़ने की गति को प्रभावित करता है या नहीं। संगीत की ध्वनि तीव्रता अलग-अलग है। निष्पक्ष परीक्षण के लिए क्या करना चाहिए?

A student investigates whether music type affects reading speed. The sound intensity differs between music types. What should be done for a fair test?

Explanation opens after your attempt
Correct Answer

A. सभी संगीत की ध्वनि तीव्रता समान रखनाKeep sound intensity the same for all music types

Step 1

Concept

Sound intensity may also affect reading speed so it should be controlled. Music type should remain the independent variable.

Step 2

Why this answer is correct

The correct answer is A. सभी संगीत की ध्वनि तीव्रता समान रखना / Keep sound intensity the same for all music types. Sound intensity may also affect reading speed so it should be controlled. Music type should remain the independent variable.

Step 3

Exam Tip

ध्वनि तीव्रता भी पढ़ने की गति को प्रभावित कर सकती है इसलिए उसे नियंत्रित करना चाहिए। संगीत का प्रकार ही स्वतंत्र चर रहना चाहिए।

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Question 12/50 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक जाँच में नमक की सांद्रता स्वतंत्र चर है। कौन सा विकल्प उसके स्तरों का सबसे अच्छा समूह है?

In an investigation salt concentration is the independent variable. Which option is the best set of its levels?

Explanation opens after your attempt
Correct Answer

A. शून्य प्रतिशत पाँच प्रतिशत दस प्रतिशत पंद्रह प्रतिशतZero percent five percent ten percent fifteen percent

Step 1

Concept

Numerical ordered concentration levels allow clear comparison. Units should be stated with levels of the independent variable.

Step 2

Why this answer is correct

The correct answer is A. शून्य प्रतिशत पाँच प्रतिशत दस प्रतिशत पंद्रह प्रतिशत / Zero percent five percent ten percent fifteen percent. Numerical ordered concentration levels allow clear comparison. Units should be stated with levels of the independent variable.

Step 3

Exam Tip

सांद्रता के संख्यात्मक और क्रमबद्ध स्तर स्पष्ट तुलना देते हैं। स्वतंत्र चर के स्तरों के साथ इकाई भी लिखनी चाहिए।

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FAQs

Class 9 Science FAQs

How many Science questions are in each level?

Each ready level is designed for 50 active questions for the selected class, subject and difficulty.

Which difficulty levels are available for Science?

Students can practice Easy, Medium, Hard and Expert levels according to their preparation stage.

Are answers and explanations available?

Yes, question pages include answer reveal, correct option, explanation, related questions and share options.