9th standard half yearly question paper 2019 with answers

The 9th standard half-yearly exams play a crucial role in a student’s academic year. They help in assessing the progress of students and identify areas where more effort is needed. Students prepare by going through previous papers and practicing with various questions from different subjects. In this article, we provide a comprehensive list of 9th standard half-yearly questions from 2019, with detailed answers for each. This will serve as a great revision tool for students aiming to perform well in their exams.

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Science

Question: What is the chemical formula for water?
Answer: The chemical formula for water is H2O.

Question: Define photosynthesis.
Answer: Photosynthesis is the process by which green plants use sunlight to synthesize foods from carbon dioxide and water.

Question: What is the difference between mass and weight?
Answer: Mass is the amount of matter in an object, while weight is the force exerted by gravity on that object.

Question: Name the three types of muscle tissue in humans.
Answer: The three types of muscle tissue are skeletal, smooth, and cardiac.

Question: What is the law of reflection?
Answer: The law of reflection states that the angle of incidence is equal to the angle of reflection.

Question: What is the main function of the human respiratory system?
Answer: The main function of the respiratory system is to facilitate the exchange of gases, such as oxygen and carbon dioxide, between the body and the environment.

Question: What is an ecosystem?
Answer: An ecosystem is a community of living organisms interacting with their physical environment.

Question: Define the term “electric current.”
Answer: Electric current is the flow of electric charge through a conductor.

Question: What is the difference between a conductor and an insulator?
Answer: A conductor allows the flow of electricity, while an insulator resists the flow of electricity.

Question: Explain the concept of renewable and non-renewable resources.
Answer: Renewable resources are those that can be replenished naturally, like solar energy, while non-renewable resources are finite, such as fossil fuels.

Question: What is the primary function of the circulatory system?
Answer: The circulatory system is responsible for transporting blood, nutrients, gases, and waste products throughout the body.

Question: What are the three states of matter?
Answer: The three states of matter are solid, liquid, and gas.

Question: What is the role of chlorophyll in plants?
Answer: Chlorophyll absorbs light energy from the sun, which is essential for photosynthesis.

Question: What is the function of the heart in the human body?
Answer: The heart pumps blood throughout the body, supplying oxygen and nutrients to tissues and removing waste products.

Question: What is the difference between a plant cell and an animal cell?
Answer: Plant cells have a cell wall and chloroplasts, whereas animal cells do not.

Question: What is the law of conservation of mass?
Answer: The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Question: What is an acid-base reaction?
Answer: An acid-base reaction is a chemical reaction between an acid and a base, often resulting in the formation of water and a salt.

Question: What are the components of a food chain?
Answer: The components of a food chain include producers, consumers, and decomposers.

Question: What is the significance of the water cycle?
Answer: The water cycle is essential for replenishing water supplies on Earth and maintaining the balance of ecosystems.

Question: What are the different types of simple machines?
Answer: The different types of simple machines include the lever, pulley, inclined plane, wheel and axle, screw, and wedge.

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Mathematics

Question: What is the Pythagorean theorem?
Answer: The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Question: Define a prime number.
Answer: A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Question: How do you calculate the area of a rectangle?
Answer: The area of a rectangle is calculated by multiplying its length by its width.

Question: What is the difference between mean, median, and mode?
Answer: The mean is the average of a set of numbers, the median is the middle value, and the mode is the most frequent number.

Question: What is a rational number?
Answer: A rational number is a number that can be expressed as the ratio of two integers.

Question: What is the formula for the area of a circle?
Answer: The area of a circle is given by the formula A = πr², where r is the radius.

Question: Define a quadratic equation.
Answer: A quadratic equation is a polynomial equation of the form ax² + bx + c = 0, where a, b, and c are constants.

Question: What is the formula for the perimeter of a rectangle?
Answer: The perimeter of a rectangle is given by the formula P = 2(l + w), where l is the length and w is the width.

Question: What is the difference between a fraction and a decimal?
Answer: A fraction is a part of a whole expressed as a numerator and denominator, while a decimal is a fraction expressed in base 10.

Question: What is an isosceles triangle?
Answer: An isosceles triangle is a triangle with at least two sides of equal length.

Question: How do you calculate the volume of a cube?
Answer: The volume of a cube is calculated by cubing the length of one of its sides (V = s³).

Question: What is the formula for the surface area of a cylinder?
Answer: The surface area of a cylinder is given by the formula SA = 2πr(h + r), where r is the radius and h is the height.

Question: What is the difference between a permutation and a combination?
Answer: A permutation is an arrangement of objects in a specific order, while a combination is a selection of objects without regard to order.

Question: How do you solve a linear equation?
Answer: To solve a linear equation, isolate the variable by performing inverse operations on both sides of the equation.

Question: What is a coordinate plane?
Answer: A coordinate plane is a two-dimensional surface defined by an x-axis and a y-axis where points are represented as (x, y) coordinates.

Question: What is the formula for the area of a triangle?
Answer: The area of a triangle is calculated using the formula A = ½ × base × height.

Question: What are complementary angles?
Answer: Complementary angles are two angles whose sum is 90 degrees.

Question: What is the volume of a sphere?
Answer: The volume of a sphere is given by the formula V = 4/3πr³, where r is the radius.

Question: What is the distributive property in algebra?
Answer: The distributive property states that a(b + c) = ab + ac.

Question: What is the LCM (Least Common Multiple) of 12 and 15?
Answer: The LCM of 12 and 15 is 60.

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Social Science

Question: Who was the first President of India?
Answer: The first President of India was Dr. Rajendra Prasad.

Question: What is the significance of the Battle of Panipat?
Answer: The Battle of Panipat was significant because it marked the rise of the Mughal Empire in India.

Question: What is the capital of India?
Answer: The capital of India is New Delhi.

Question: Who wrote the book “Discovery of India”?
Answer: The book “Discovery of India” was written by Jawaharlal Nehru.

Question: Define democracy.
Answer: Democracy is a system of government where the citizens exercise power by voting.

Question: What was the role of Mahatma Gandhi in India’s independence?
Answer: Mahatma Gandhi led non-violent movements like the Salt March and Quit India Movement, playing a key role in India’s independence.

Question: What is the importance of the Constitution of India?
Answer: The Constitution of India is the supreme law that defines the rights and duties of citizens and establishes the framework for government.

Question: Who is known as the “Father of the Nation”?
Answer: Mahatma Gandhi is known as the “Father of the Nation.”

Question: What are the primary sources of information in history?
Answer: The primary sources of information in history include documents, artifacts, and oral accounts from the time period being studied.

Question: What is the Green Revolution?
Answer: The Green Revolution refers to the period of significant agricultural advancements in India, leading to increased food production.

Question: What is the importance of the Himalayas in India?
Answer: The Himalayas are important as they form a natural barrier and influence the climate and monsoons in India.

Question: Who was the first woman Prime Minister of India?
Answer: The first woman Prime Minister of India was Indira Gandhi.

Question: What is secularism?
Answer: Secularism is the principle of separating religion from government affairs.

Question: What was the significance of the Indian National Congress?
Answer: The Indian National Congress played a crucial role in the struggle for Indian independence from British rule.

Question: What is the role of the judiciary in India?
Answer: The judiciary in India interprets laws, ensures justice, and protects the rights of citizens.

Question: What was the Quit India Movement?
Answer: The Quit India Movement was a mass protest launched by Mahatma Gandhi in 1942, demanding an end to British rule in India.

Question: Who is known for the concept of “non-violence”?
Answer: Mahatma Gandhi is known for promoting the concept of “non-violence” (ahimsa).

Question: Define the term “globalization.”
Answer: Globalization refers to the process of increasing interaction and integration between countries, especially in terms of trade, technology, and culture.

Question: What is the significance of the Indian National Army (INA)?
Answer: The Indian National Army was formed by Subhas Chandra Bose and played a significant role in the struggle for India’s independence.

Question: What are the three branches of government in India?
Answer: The three branches of government in India are the Executive, the Legislature, and the Judiciary.

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This comprehensive collection of questions and answers will guide students in their preparation for the 9th standard half-yearly exams. Practicing these will help reinforce key concepts and boost exam confidence.