Class 8th Science MCQs Questions and Answers

If you are looking for Class 8th Science MCQs (Multiple Choice Questions) Solved with Answers. Here you will find all 8th Class Science MCQs. All these MCQs for the 8th Class are helpful in any competitive exam and test. 

class 8th science mcqs with answers

In this section, you will find class 8th Science MCQs all chapters. Each chapter covers the most important topics and concepts that are related to Class 8th General Science. 

For the easiness of our reader, we have created a complete chapter-wise table of contents through which you can easily jump to a particular chapter. 

Table of Contents

Chapter 1: Class 8th Science MCQ

1: Our nervous system consists of:

  • a) Mouth, Food canal, Stomach
  • b) Heart, Liver, and Kidney
  • c) Brain, Spinal cord, and Nerves
  • d) Eye, Ear, and Nose

c) Brain , Spinal cord and Nerves

2:The brain of an adult human being weighs about__________ pound.

  • a) Two 
  • b) Three 
  • c) Four 
  • d) Five 

b) Three

3: _________ system consists of neurons and tissue that regulates the actions and responses.

  • a) Respiration System 
  • b) Excretory System 
  • c) Digestive System 
  • d) Nervous System 

d) Nervous System

4: Our brain is protected by three layers of connective tissues called  ________.

  • a) Menings 
  • b) Cereburm 
  • c) Lumbar 
  • d) Ulnar

a) Menings

5: The brain of an adult human weighs between _________ grams.

  • a) 1300 and 1400 
  • b) 1500 and 1600 
  • c) 1800 and 1900
  • d) 1900 and 2000 

a) 1300 and 1400

6: The _________ consists of the Cerebrum, Thalamus, and Hypothalamus. 

  • a) Midbrain 
  • b) Hindbrain 
  • c) Forebrain 
  • d) None of these 

c) Forebrain

7: The part of the brain responsible for intelligence, thinking, reasoning and judgement is:

  • a) Forebrain 
  • b) Midbrain 
  • c) Hindbrain 
  • d) None of them 

a) Forebrain

8: The _________ connects the brain to the spinal cord.

  • a) Cerebellum 
  • b) Thalamus 
  • c) Cereburm 
  • d) Meddula oblongata 

d) Meddula Oblongata

9: Our heart beat, blood pressure vomiting is controlled by__________.

  • a) Medulla Oblongata 
  • b) Cerebrum 
  • c) Cerebellum 
  • d) Spinal Cord 

a) Medulla Oblongata

10: Which part of the brain consists of the cerebellum, pons, and medulla oblongata?

  • a) Hindbrain 
  • b) Forebrain 
  • c) Midbrain 
  • d) None of above 

a) Hindbrain

Chapter 2: Class 8th Science MCQ

11: If the ________ is damaged, messages can’t move between the brain and the rest of the body.

  • a) Liver 
  • b) Kidney 
  • c) Stomach 
  • d) Spinal Cord 

d) Spinal Cord

12: Which of the following Nerves are responsible for producing voluntary responses and involuntary responses?

  • a) Motor Nerves 
  • b) Sensory Nerves 
  • c) Optical Nerves 
  • d) Auditory Nerves 

a) Motor Nerves

13: There are __________  primary types of bone cells in the body. 

  • a) Two 
  • b) Three 
  • c) Four 
  • d) Five 

b) Three

14: The type of muscle cells that form involuntary muscle is: 

  • a)  Skeletal  skeletal
  • b) Smooth muscle cells
  • c) Cardiac muscle cells
  • d) None of them 

c) Cardiac muscle cells

15: Transmissions and integrations of information is possible through _______.

  • a)  Epithelial Tissue
  • b) Connective Tissue
  • c) Muscle Tissue
  • d) Nervous Tissue

d) Nervous Tissue

16: Our brain has more than ________ neurons. 

  • a) 100 million 
  • b) 100 thousand
  • c) 100 billion 
  • d) 100 

c) 100 billion

17: A ________ consist of two parts, cell body, and axon.

  • a) Neuron 
  • b) Spinal Cord 
  • c) Cereburm 
  • d) Themlomos 

a) Neuron

18: Which of the type of neurons are responsible for analyzing the message and issuing orders?

  • a) Sensory Neurons 
  • b) Motor Neurons 
  • c) Associative Neurons 
  • d) None of these

c) Associative Neurons

19: Reading, writing, driving, and speaking are ______ actions.

  • a) Voluntary 
  • b) Involuntary 
  • c) Both 
  • d) None

a) Voluntry

20: ________ helps us to eliminate waste materials from the body?

  • a) Excretory System 
  • b) Respiration System 
  • c) Reproductive System 
  • d) Digestive System 

a) Excretory System

Chapter 3: Class 8th Science MCQ

21: Which one of the following is involuntary action?

  • a) Running 
  • b) Eating 
  • c) Heart beat 
  • d) Driving 

 

c) Heart beat

22: The structural and functional unit of kidney is called__________.

  • a) Neuron 
  • b) Nephron 
  • c) Ureter 
  • d) None of these 

b) Nephron

23: The _________ is a tube that carries Urine from each Kidney to the bladder.

  • a) Ureter 
  • b) Urethra 
  • c) Renal 
  • d) None of them 

a) Ureter

24: The cleaning of a patient’s blood artificially with the help of a machine is called________.

  • a) Therapy 
  • b) Dialysis 
  • c) Appendectomy
  • d) Debridement

b) Dialysis

25: Which part of the brain regulates breathing?

  • a) Cerebellum
  • b) Pons 
  • c) Medulla Oblongata 
  • d) Thalamus

b) Pons

26: Reflex actions occur with the help of:

  • a) Spinal Cord 
  • b) Heart
  • b) Kidneys 
  • d) Pancreas 

a) Spincal Cord

27: Kidneys eliminate waste by filtering:

  • a) Water 
  • b) Fluid
  • c) Urine 
  • d) Blood 

d) Blood

28: The major organ of the excretory system is:

  • a) Intestine 
  • b) Liver 
  • c) Kidney 
  • d) Lungs 

c) Kidney

29: The type in which a parent cell divides into two genetically identical daughter cells is called________.

  • a) Meiosis 
  • b) Mitosis 
  • c) Both a and b 
  • d) None of above 

b) Mitosis

30: Mitosis occurs only in _______ cells.

  • a) Somatic 
  • b) Germs 
  • c) Both
  • d) None 

a) Somatic

Chapter 4: Class 8th Science MCQ

31: Cell division in which a cell is divided into four daughter cells is known as_________

  • a) Mitosis 
  • b) Meiosis 
  • c) Both a and b
  • d) None of them 

a)) Mitosis

32: Number of chromosomes in Mitosis:

  • a) Reduced to half 
  • b) Remain Same 
  • c) Increase
  • d) Decrease 

b) Remain Same

33: The transfer of characteristics from parents to their offspring’s is called__________ .

  • a) Biogenetics 
  • b) Transformation 
  • c) Reproduction 
  • d) Heredity 

 

d) Heredity

34: ________ is the basic hereditary material in all living organisms.

  • a) RNA 
  • b) DNA 
  • c) Both DNA and RNA 
  • d) None of these 

b) DNA

35: The process in which the DNA of a cell is duplicated to make two similar copies of the parent DNA is called__________.

  • a) Reproduction 
  • b) Heridity 
  • c) Replication 
  • d) None of these 

c) Replication

36: Penciline is an example of:

  • a) Enzyme 
  • b) Antigen 
  • c) Hormone 
  • d) Antibiotic 

d) Antibiotic

37: Production of multiple copies of same genuine is called______.

  • a) Genetic Engineering 
  • b) Fermentation 
  • c) Recombination
  • d) Cloning 

a) Genetic Engineering

38: Dry air consists of _____  of Orgon and other gases.

  • a) 1%
  • b) 78%
  • c) 21% 
  • d) 0.03%

a) 1%

39: Undesirable change in the environment that affects and disturb the ecosystem is called_____.

  • a) Climate Change 
  • b) Pollution 
  • c) Green House Effect 
  • d) None of these 

b) Pollution

40: Due to the greenhouse effects increase in the average temperature of Earth is called______.

  • a) Climate Change 
  • b) Pollution 
  • c) Global Warming 
  • d) None of these 

c) Global Warming

Chapter 5: Class 8th Science MCQ

41: Which gas from the following is/are air pollutants?

  • a) Sulfur Oxide
  • b) Nitrogen Oxide
  • c) Carbon Dioxide
  • d) All of these 

d) All of these

42: Vehicular is a major source of_______.

  • a) Oxygen 
  • b) Hydrogen 
  • c) Carbon Monoxide 
  • d) Chlorofluorocarbon 

c) Carbon Monoxide

43: ________ are used as cooling agents in refrigerators.

  • a) CFC’s
  • b) Ozone
  • c) Helium 
  • d) Sulfur Oxide 

a) CFC’s

44: Deforestation causes:

  • a)Soil Erosion 
  • b) Green House Effects 
  • c) Air Pollution 
  • d) All of these 

d) All of these

45: Nitrogen is widely used in__________.

  • a) Steel industry 
  • b) Fertilizers 
  • c) Match Industry 
  • d) Electrical Wires 

b) Fertilizers

46: The symbols of Chlorine is________.

  • a) K
  • b) Al
  • c) Cl
  • d) Na 

c) Cl

47: The word “acid” means_________

  • a) Sour 
  • b) Sweet 
  • c) Salty 
  • d) Spicy 

a) Sour

48: Alkalis are _________ in taste.

  • a) Umami
  • b) Sweet 
  • c) Bitter 
  • d) Salty 

c) Bitter

49: In System International the unit for measurement of force is:

  • a) Pascal 
  • b) Newton 
  • c) Joule 
  • d) Hertz 

b) Newton

50: There are _________ seconds in a solar day.

  • a) 68000
  • b) 46000
  • c) 86040
  • d) 86400

d) 86400

Chapter 6: Class 8th Science MCQ

51: A measuring cylinder is used to measure the:

  • a) Volume of Solids 
  • b) Volume of liquids 
  • c) Lenght of objects 
  • d) Disance 

b) Volume of liquids

52: Which one is the unit for the intensity of light:

  • a) J
  • b) mol
  • c) cd 
  • d) Pa 

c) cd

53: 1 Kilo is equal to: 

  • a) 109
  • b) 103
  • c) 102
  • d) 106

b) 103

54: 1 Kilogram is equal to __________ grams.

  • a) 1000
  • b) 10 
  • c) 100
  • d) 10000

a) 1000

55: The main source of solar energy is:

  • a) Moon 
  • b) Sun 
  • c) Stars 
  • d) Electricity 

b) Sun

56: When objects are heated the distance between molecules:

  • a) Increases 
  • b) Decreases 
  • c) Remain same 
  • d) Not Affected 

a0 Increases

57: Which material will expand on heating?

  • a) Solids 
  • b) Liquids 
  • c) Gases 
  • d) All of these 

d) All of these

58: A point in the middle of lens is called________.

  • a) Principle Axis 
  • b) Principle Focus 
  • c) Optical center 
  • d) Focal Length 

c) Optical Center

59: Which of the following are the building blocks of modern electrical devices?

  • a) Transistors 
  • b) Diodes 
  • c) Integrated Circuits 
  • d) None of them

 

c) Integrated Circuts

60: When one of the surfaces of a lens is concave and other is plane, the lense is called______.

  • a) Plane Convex Lense 
  • b) Double Convex Lense 
  • c) Plance Concave Lense 
  • d) Concave-Convex Lense 

c) Plane Concave Lense

MCQs Topics

All these Multiple Choice Questions cover the following chapters and topics of General Science of Class 8th.

  1. Human Organ System MCQs with Answers 
  2. Heredity in Organism MCQs with Answers 
  3. Biotechnology MCQs with Answers
  4. Plooutant and their effect on Environment MCQs 
  5. Chemical Reactions MCQs Solved with Answers
  6. Force and Pressure MCQs with Answers 
  7. Measurement of Physical Quantities MCQs
  8. Sources and Effects of Heat Energy MCQs
  9. Lenses MCQs Solved with Answers 
  10. Electricity MCQs Questions and Answers 
  11. Lenses Solved MCQs with Answers

 

 

FAQs:

Question: Why all these 8th class science MCQs are important? 

Answer: All these Multiple Choice Questions cover important concepts and topics related to class 8th science. These Science MCQs with Answers are helpful for students’ online quizzes and tests. 

Question: How these Science MCQs will help me for competitive exams?

Answer: In many competitive exams like PMS Test, CSS Test, KPPSC Test, PPSC Test, BPSC Test, SPSC Test, NTS Test, PTS Test, ATS Test, BTS Test, and FPSC Test a section of Science MCQs are included. So these will also help you in such competitive exams and tests.

Question: Where I can find General Science MCQs for Teaching Cadres
posts in ETEA Test? 

If you are looking to find the latest Science MCQs for the following ETEA Test Preparation: 

  • DM General Science MCQs for ETEA Test
  • PET General Since MCQs for ETEA Test 
  • CT General Science MCQs for ETEA Test 
  • PST General Science MCQs for ETEA Test

All these Science Multiple Choice Questions are helpful for the above-mentioned ETEA Test.

Question: Are these Science Multiple Choice Questions and Answer of Class 8th are useful for students? 

Answers: Yes, all these General Science Multiple Choice Questions are very useful and helpful for student’s annual examinations, assessments, monthly quizzes, Entry Test, Collage and University Entrance Test, and Subject Test Preparations Test. 

More Useful Science MCQs for Online Test Preparation

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