CBSE Sample Papers For Class 8 Science Mock Paper 1

Science is both a fascinating and instructive field of study. Despite the fact that Science is all around us, it can be challenging to understand at times. Science influences every aspect of who we are and everything we encounter all around us. Science lays the groundwork for a wide range of careers, including Psychology, Forensic Science, Biomedical Science, Geology, Hydrology, Pharmacology, Science Journalism and so on. It is one of the most important subjects taught in a student’s academic career. Students must have a thorough understanding of this subject in order to master it and build a compelling professional life.

Developing a deep understanding of the concepts covered in Science can help students pave the way for a career in a variety of fields, it is critical that students study Mathematics with vigour. It is critical for students to have a thorough and correct understanding of Science concepts in order to establish a successful career. Students in Class 8 may utilise the CBSE Sample Papers For Class 8 Science Mock Paper 1 to improve their comprehension of fundamental concepts in Science. It is recommended that students in Class 8 make use of the CBSE Sample Papers For Class 8 Science Mock Paper 1 in order to perform well in their CBSE Science Examination.

It is important for students to be aware that the Central Board of Secondary Education is responsible for conducting annual examinations. Additionally, CBSE is responsible for prescribing and authorising examination conditions in addition to conducting examinations. Curriculum materials for the CBSE examinations are derived from the NCERT curriculum. To prepare for the CBSE examination, it is highly recommended that students use the NCERT Books. Students can also access the CBSE Sample Papers For Class 8 Science Mock Paper 1 from the Extramarks website to study for the Class 8 CBSE Examination of Science. The marks obtained by Class 8 students in the CBSE Examination of Science play a significant role in the availability of opportunities in the field of their choice. Students can prepare for their examination using the CBSE Sample Papers For Class 8 Science Mock Paper 1. Because the CBSE examination is heavily based on past years’ papers, it is best for students to refer to the CBSE Previous Year Question Papers.

How to Download CBSE Sample Paper-1 for Class 8 Science with Solutions Free PDF

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How to Download CBSE Sample Paper-1 for Class 8 Science with Solutions

Students can access the CBSE Sample Papers For Class 8 Science Mock Paper 1 With Solutions from the Extramarks website for better explained and elaborated solutions. Past years’ papers of all subjects and examinations are also available on the Extramarks website. Students can also take mock tests and practice sample papers on the Extramarks website. Taking mock tests can assist students in keeping track of their progress in preparation for the CBSE examination. Extramarks’ website and learning application also provide students with practice papers and solved examples. Extramarks also provides PDF files of sample papers and solved examples. Students can improve their speed at attempting the paper by practising CBSE Sample Papers. Practising sample papers and solved examples can also help students identify which topics they are confident in and which they need to study more thoroughly. Given the importance of the Science subject in the CBSE examination of Class 8, students should thoroughly practice mock sample papers with the help of the CBSE Sample Papers For Class 8 Science Mock Paper 1.

The CBSE Sample Papers For Class 8 Science Mock Paper 1 are appropriately elaborated for students to understand. Extramarks has broken the CBSE Sample Papers For Class 8 Science Mock Paper 1 down into smaller and simpler steps. The framework used in the CBSE Sample Papers For Class 8 Science Mock Paper 1 is simple for students to grasp. Extramarks’ study material can assist students in better understanding the concepts introduced and taught in the CBSE Syllabus. Students must devote more time to the chapters that carry more weightage in the CBSE Examination of Science Class 8. Students should be aware of the most recent examination pattern in order to achieve high marks in the CBSE examination. Knowing the CBSE examination pattern can assist students in weeding out unnecessary information and focusing on learning and preparing from adequate learning resources. Students may acquire information on the CBSE examination question paper pattern, examination framework, marks distribution, chapter weightage, and marking scheme from the Extramarks website.

Sample Paper Class 8 Science Overview

Class 8 is among the most important in a student’s academic career. It is critical that students comprehend the gravity of the CBSE Examination of Class 8 Science. Students can use the CBSE Sample Papers For Class 8 Science Mock Paper 1 to aid themselves prepare for the CBSE Class 8 Examination. Students who have limited knowledge and resources may find it difficult to progress through the preparation process. Extramarks provides a variety of learning resources on the Extramarks website for students of all classes to help them prepare. The Extramarks website contains study materials for grades 1 through 12. Students of Class 8 can access the CBSE Sample Papers For Class 8 Science Mock Paper 1 from the Extramarks website or mobile application.

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Class 8th Science Sample Paper Benefits

The CBSE Sample Papers For Class 8 Science Mock Paper 1 have been curated in great detail such that students can understand and learn effectively. It is recommended that students thoroughly review the NCERT curriculum and practise the CBSE Sample Papers For Class 8 Science Mock Paper 1 numerous time. Students are advised to utilise the CBSE Sample Papers For Class 8 Science Mock Paper 1 for their preparation. Students can also access revision notes for Class 8 Science via the Extramarks website or mobile application, which are available in both Hindi and English. Extramarks also offers the downloadable file of the CBSE Sample Papers For Class 8 Science Mock Paper 1 in PDF format.

Students taking the Science Examination of Class 8 must make it a point to go over their syllabus thoroughly and meticulously in order to achieve the highest possible marks. Students must understand the importance of performing well in the Class 8 examination. Students’ performance in the Class 8 examination helps to shape their academic path. The CBSE Sample Papers For Class 8 Science Mock Paper 1 have been prepared by professionals with extensive knowledge of the concerned subject. Students may make use of the CBSE Sample Papers For Class 8 Science Mock Paper 1 for the preparation of the Class 8 Science Examination. The CBSE Sample Papers For Class 8 Science Mock Paper 1 have been extensively elucidated for students’ better comprehension. For better preparation, students can refer to the CBSE Sample Papers For Class 8 Science Mock Paper 1 and practice questions and answers from the CBSE examination perspective. Students appearing for the Science Examination of Class 8 are expected to prepare for the exam in advance. Starting the preparation for the concerned examination early can help students gain an advantage. It may increase students’ chances of getting a higher score on the exam.

Chapters of CBSE Class 8 Science – At A Glance

Experts of the concerned subject have prepared the CBSE Sample Papers For Class 8 Science Mock Paper 1 based on the most recent Central Board of Secondary Education syllabus. The CBSE Sample Papers For Class 8 Science Mock Paper 1 are highly recommended for students preparing for the Central Board of Secondary Education’s Science examination. Extramarks also offers downloadable revision notes for students to continue revising the syllabus that they have already thoroughly studied. Students who have thoroughly covered all the chapters of the Class 8 Science syllabus and practised the CBSE Sample Papers For Class 8 Science Mock Paper 1 are advised to go over the syllabus revision notes.

The CBSE Sample Papers For Class 8 Science Mock Paper 1 can be used by students as a tool to enhance their preparation process. Extramarks’ CBSE Sample Papers For Class 8 Science Mock Paper 1 have been designed in a detailed manner. They have been elaborated in a manner that aids students have a better comprehension of the breakdown of steps to efficiently answer the exercise questions. Students are advised to be sincere in their preparation for the Class 8 examination since the grades obtained in the Class 8 examination can influence the career path that students choose. Students are urged to review past years’ papers from time to time in order to become acquainted with the question paper pattern. Knowing the pattern of the question paper can help students gain confidence when answering examination questions. It is advisable for students of Class 8 to practice sample papers regularly as this can help students build a better and stronger conceptual understanding with regard to all the important topics in the Class 8 CBSE Science syllabus. Students may acquire the CBSE Sample Papers For Class 8 Science Mock Paper 1 from the website or mobile application of Extramarks.

Sample Questions for Class 8 Science CBSE Board Examinations

Students who regularly practice syllabus exercises may be able to identify which topics they have perfected and which they still need to work on. This may save students time while assisting them to focus their efforts in the right direction. Students are encouraged to practise for the examination using the sample papers available on the Extramarks website. The duration required to finish the sample paper will reduce with each attempt, allowing students to better manage their time during the CBSE Class 8 examination. It is critical that students consider the marks distribution and topic wise weightage when studying and practising for the CBSE Examination of Science.

Students must invest more time studying topics that have a higher chance of being asked in the CBSE examination. Students can solve the sample papers provided by Extramarks with the assistance of the CBSE Sample Papers For Class 8 Science Mock Paper 1 with solutions. Students can use the CBSE Sample Papers For Class 8 Science Mock Paper 1 available on the Extramarks website to prepare for the Science examination.

The study material and learning resources available on the Extramarks website and mobile application have been curated in accordance with the CBSE guidelines. Students in Class 8 can obtain the CBSE Sample Papers For Class 8 Science Mock Paper 1 for their preparation from the Extramarks website, as the CBSE Sample Papers For Class 8 Science Mock Paper 1 have been prepared in accordance with the CBSE examination guidelines and conditions.

Q1. Enlist two advantages of crop rotation.

Ans: The advantages of crop rotation are as follows:
a. It reduces soil erosion.
b. It maintains nutrients in the soil.

Q2. Name any one environmental issue, which arises due to the increased concentration of carbon dioxide in the atmosphere.

Ans: Global warming arises due to the increased concentration of carbon dioxide in the atmosphere.

Q3. What is the difference between the eggs of a hen and of a frog?

Ans:

Egg of a hen

Eggs of a frog
It is surrounded by a hard shell. No hard shell surrounds the egg.
No jelly is present. A jelly surrounds the eggs.

Q4. How is carbon black prepared?

Ans: Carbon black is prepared by burning oils and the petroleum gas in insufficient supply of air.

Q5. Why a girl should not become pregnant during teenage?

Ans: A girl should not become pregnant during teenage because early motherhood can cause health problems in the mother and the child. It is because a girl is not mentally and physically prepared for motherhood.

Q6. Enlist the energy sources used for lifting water with the help of pumps in traditional irrigation methods.

Ans: The energy sources used for lifting water with the help of pumps in traditional irrigation methods are:
a. Diesel
b. Electricity
c. Biogas
d. Solar energy

Q7. Give two reasons which endanger the existence of endemic species.

Ans: Two reasons that endanger the existence of endemic species are:

1. Destruction of their natural habitat.

2. Introduction of new species in their habitat.

Q8. A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.

Ans:

  1. The force of gravity which tries to pull the rocket downwards.
  2. The force of friction due to earth’s atmosphere, which opposes the motion of the rocket.

Q9. “Virus are living or non-living.” Comment with reasons.

Ans: Viruses are considered as the connecting link between living and nonliving.
1. They can be considered nonliving as they neither grow nor reproduce once out side the host.
2. They can be considered living as they multiply very fast and grow when entered the host.

Q10. What is a cataract? How this defect can be removed?

Ans: A cataract is an eye defect that usually occurs in old age. In this eye defect, eyesight becomes foggy because the eye lens becomes cloudy. There is a loss of vision. This defect can be treated when the opaque lens is removed and the new artificial lens is inserted.

Q11. (i) What are petrochemicals?

(ii) Why petroleum is called black gold?

Ans: (i) The useful substances that are obtained from petroleum and natural gas are called petrochemicals.

(ii) Due to great commercial importance of petroleum, it is called black gold.

Q12. Write the functions of the following:
(a) Optic nerves
(b) Retina
(c) Cornea

Ans: Their functions are as follows:

(a) Optic nerves: Its function is to carry optical messages (visual messages) to the brain.
(b) Retina: Its function is to receive the optical image of the object and convert it to optical pulses. These pulses are then sent to the brain through the optic nerve.
(c) Cornea: Its function is to acts as a window to the world i.e., to allow the light to enter the eyeball.

Q13. What are the differences between the stages of development in frogs and in humans after fertilisation?

Ans:

Development in frog Development in human
It takes place outside the body of the female. It takes place inside the body of the female.
Stages in the development a frog are egg, larva and adult. Stages in the development of a human are foetus, young one and adult.
The young one is different from the adult. The young one is similar to the adult.

Q14. (i) What are the effects caused by disease causing microorganisms?
(ii) What measures can be taken to control them?
(iii) Name some plant diseases with their causative organism.

Ans: (i) Some microorganisms cause diseases in plants like wheat, rice, potato, sugarcane, which destroy the whole crop and also decrease the yield of the crop.
(ii) They can be controlled by using chemicals which kill these microbes.
(iii) Few plant disease:
Plant Diseases               Micro- organism           Transmission
Citrus canker                     Bacteria                      Air
Rust of wheat                    Fungi                          Air, seeds

Q15. Explain the process of an electric discharge?

Ans: During the development of thunderstorm, air currents move in the upward direction and the water droplets move in the downward direction. These movements causes the seperation of charges. Usually, the negative charges accumulate at the lower part of the clouds and the positive charges are accumulated at its upper part. The positive charges are also accumulated at the ground also. When the accumulation of charges becomes large, a high potential difference is set up between lower part of clouds and earth, which is sufficient to break the insulation of air. As a result, negative and positive charges meet, producing streaks of bright light and sound. This process is called an electric discharge.

Q16. What do you mean by the force of friction? How can it be minimised?

Ans: Frictional force is a force, which always opposes the motion of a body over a given surface. Whenever a body actually moves over a surface, frictional force appears in a direction opposite to the direction of motion of the body and this opposite force tries to oppose the motion of body. By using the lubricants on surfaces and by polishing a rough surface, we can reduce the friction.

Q17. Define global warming. What is the impact of global warming on the earth?

Ans: Combustion of fuels such as coal and petrol releases carbon dioxide in the environment. Increased concentrations of carbon dioxide leads to a rise in the temperature of the earth’s atmosphere. The rise in the temperature of the earth’s atmosphere is known as global warming. It results in the melting of polar glaciers. As a result, the sea level rises causing floods in the coastal areas. Also, the low-lying coastal areas may get permanently submerged underwater.

Q18. How do we hear sound? Explain with the diagram

Ans: The shape of the ear’s outer part is like that of a funnel. As sound goes inside the outer part of the ear, it propagates in a canal. At the end of the canal, there is a thin membrane which is stretched tightly. It is called eardrum. The eardrum is like a stretched rubber sheet. The eardrum vibrate due to the sound vibrations. Then these vibrations are send by the eardrum to the inner ear. The signal from the inner ear goes to the brain. In this way, we hear sound.

Q19. Write any five hormones along with their roles.
OR
a. Differentiate between internal and external fertilisation.
b. Write down the type of fertilisation in the following animals:
i) Frogs
ii) Hens
iii) Humans

Ans:

Different hormones along with their roles are tabulated below:

Hormones
Functions
​Growth hormone​
​Helps in growth of the body​
​Insulin​
​Maintains the level of sugar (glucose) in the blood​
​Testosterone​
​Causes secondary sexual changes in boys​
​Estrogen​
​Causes secondary sexual changes in girls​
​Adrenaline
​Maintains correct salt balance in the blood​

OR
a. The fertilisation in which the fusion of sperm and ovum (gametes) takes place inside the body of the female is known as internal fertilisation whereas the fertilisation in which fusion of gametes takes place outside the body of the female is known as external fertilisation.
b.
i) Frogs- External fertilisation
ii) Hens- Internal fertilisation
iii) Humans- Internal fertilisation
Q20. (i) What is a gold leaf electroscope?

(ii) Draw a labelled diagram of electroscope and explain its construction.

Ans: (i) Gold leaf electroscope is an instrument used for detecting and measuring(comparing) charge of small magnitudes.

Labeled diagram of a gold leaf electroscope:

It consists of a metal disk, cork, brass rod, gold leaves and glass jar. From the mouth of a glass jar a brass rod passes. The brass rod is held in vertical position by the cork. Upper end of the brass rod is fixed to the metal disc while its lower end carries two gold leaves.

(ii) Applications of gold leaf electroscope:

(a) It is used to detect whether a body is charged or not.

​(b) It is used to detect the nature of charged on a body.​

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FAQs (Frequently Asked Questions)

The CBSE Science Examination of Class 8 can be difficult. However, if students prepare thoroughly before taking the examination, it is not difficult to achieve high marks in the Class 8 Science examination. Students must thoroughly cover the relevant syllabus in order to perform well in the concerned Examination of Science. Students of Class 8 are recommended to refer to the CBSE Sample Papers For Class 8 Science Mock Paper 1 provided by Extramarks in order to prepare well for the concerned examination. Repetitively practising the CBSE Sample Papers For Class 8 Science Mock Paper 1 can aid students in securing high marks in the Class 8 CBSE Examination of Science.

Extramarks is highly recommended for those preparing for tests such as the CBSE Board, CUET, JEE, NEET, IITJEE, and others. It is regarded as one of the most reliable educational websites, offering high-quality pedagogical resources.  Extramarks provides students with a variety of learning resources, including practice papers, revision notes, past years’ papers, and the CBSE Sample Papers For Class 8 Science Mock Paper 1. Downloading the CBSE Sample Papers For Class 8 Science Mock Paper 1 in PDF file allows students to access the study material without an internet connection. The CBSE Sample Papers For Class 8 Science Mock Paper 1 have been specifically formulated by professionals in the concerned field with the CBSE examination in mind, hence it is recommended that Class 8 students refer to them for their preparation. Students can access the required study resources from Extramarks for their preparation by signing up on the website of Extramarks. By signing up on the Extramarks website, students can avail of various learning materials ranging from past years’ papers to online live sessions and doubt-clearing sessions.