Class 7 NCERT solutions for neccasary for students to learn and understand. When the student gets stuck with the questions, NCERT solutions can help them get an idea of how and what to do answer the question. With pre researched and expert revised solutions to questions, students can learn and understand how to solve or answer a questions. It gives students a sample of how and what should be the answer to the question. Also with tons of homework and work pressure on students, NCERT solutions can make the homework easier and less confusing. 

School Connect Online provides you NCERT solution for class 7 for every subject to help students as well as tutors. NCERT solutions for each subject, chapter and topic are available for students to read and learn. The NCERT books followed in various CBSE and state board affiliated schools. At the end of each chapter, an exercise is provided. Students should solve those exercise questions thoroughly. In the final exam, questions are asked from these NCERT exercise problems. . So, to help them we have provided detailed step by step NCERT Solutions for all the classes. These solutions will also help students in writing the answers in a better way from the exam perspective, so that they score more marks in exams.

 Class 7th NCERT solutions

The syllabus is divided into different subjects such as Physics, Chemistry, and Biology and all the chapters are mentioned there.

Students of Class 7 Science can access the latest CBSE syllabus for the academic year 2020-2021 here.

Class 7 Science syllabus

Chapter 1: Nutrition in Plants

Chapter 2: Nutrition in Animals

Chapter 3: Fibre to Fabric

Chapter 4: Heat

Chapter 5: Acids, Bases and Salts

Chapter 6: Physical and Chemical Changes

Chapter 7: Weather, Climate and Adaptations of Animals of Climate

Chapter 8: Winds, Storms and Cyclones

Chapter 9: Soil

Chapter 10: Respiration in Organisms

Chapter 11: Transportation in Animals and Plants

Chapter 12: Reproduction in Plants

Chapter 13: Motion and Time

Chapter 14: Electric Current and its Effects

Chapter 15: Light

Chapter 16: Water – A Precious Resource

Chapter 17: Forests – Our Lifeline

Chapter 18: Wastewater Story

Chapter’s Introduction

Chapter 1: Nutrition in Plants – Class – 7 – Notes

• Living organisms like human beings, plants and animals need food to survive and exist.
• Living organisms reproduce, respond to the environment and also adapt.
• Living organisms respire and excrete as well.

Chapter 2: Nutrition in Animals – Class – 7 – Notes

• Each species or type of organism has their own way of taking in food.
• Bees and hummingbirds suck plant-nectars, infants of humans and some animals feed on mother’s milk, Snakes such as python consume the animals upon which they prey.
• Aquatic animals filter small food particles floating close by and feed on them.

Chapter 3: Fibre to Fabric – Class – 7 – Notes

A material which is composed of thin and continuous strands is known as fibre. Plant fibres are elongated most commonly sclerenchyma supportive plant cells with thick cellulose walls with a well-organised structure.

Chapter 4: Heat  – Class – 7 – Notes

Have you ever experienced cold inside the house and warmth in the sun, during winter? Also, feeling hot inside as well as outside the house in the summer season? To protect ourselves from the chilling cold, we wear clothes made of wool. These woollen clothes are obtained from wool yielding animals such as sheep, goat, yack, etc. Wearing light coloured clothes during summer will give us a feeling of coolness. To know if the object is hot or cold, and the degree of its hotness, we will be studying this chapter. The measure of the intensity of heat present in a substance is called temperature. It is measured with the use of a device called a thermometer.

There are two types of thermometer viz Laboratory thermometer and clinical thermometer.

Below are a few differences between the two:

Chapter 5: Acids, Bases and Salts  – Class – 7 – Notes

Acids

• Acids are substances that taste sour and are corrosive in nature.
• It turns blue litmus paper to red.
• These substances are chemically acidic in nature.E.g.:-orange juice, curd, vinegar, hydrochloric acid etc.

Bases

• Bases are substances that, in aqueous solution, are slippery to the touch and bitter in taste.
• It turns red litmus paper to blue.
• These substances are chemically basic in nature. Eg:- soap, ammonium hydroxide, calcium hydroxide, etc.

Salts

• Salt is the product formed from the neutralisation reaction of acids and bases.
• In the reaction between hydrochloric acid and sodium hydroxide the salt formed is sodium chloride.

HCI+NaOH→NaCl+H₂O

• Salt can be acidic, basic or neutral in nature.

Chapter 6: Physical and Chemical Changes – Class – 7 – Notes

There are many differences between physical and chemical changes and it is important to understand them to be able to understand these concepts clearly. To understand physical and chemical properties and changes better, it is important to know what they are.

There are several changes we come across daily e.g dissolving sugar in water, or flattening a metal rod by beating it. These involve changes in the form of the substance. Changes can be classified as:

(i). Physical

(ii). Chemical

Chapter 7: Weather, Climate and Adaptations of Animals of Climate – Class – 7 – Notes

• The day-to-day conditions of the atmosphere at a place with respect to elements like humidity, temperature, wind speed, rainfall, etc. is called the weather of that place.
• Weather can be cloudy, sunny, rainy, stormy or clear. It is a part of the natural phenomenon which maintains the equilibrium in the atmosphere.
• But conditions can be worse sometimes. When the atmospheric conditions are extreme or intense enough to cause property loss or life loss, such weather is termed as severe weather.
• These also vary according to the altitudes, latitudes, and region and pressure differences. Tornadoes, cyclones, heavy rainfall, fog, winter storms come under this category. They are disastrous and hazardous. Proper disaster management and strategies are required to handle these conditions.

Chapter 8: Winds, Storms and Cyclones – Class – 7 – Notes

The movement of air is mainly caused by the differences in pressure and temperature. Warm air is lighter and it rises upwards, meanwhile, cold air is denser and hence it moves down to replace the warm air. This phenomenon creates wind.

The movement of air across the earth determines the weather and climate of all regions. The sun’s radiation heats up the land, sea and the air. The land and water bodies also heat up the air, making it less dense. Here, hot air increases and creates low pressure over that area and cold air sinks and creates a region of high pressure. Air, like all fluids, likes to maintain equal pressure. To do so, cold air from high-pressure areas flows into regions of lower pressure.

Chapter 9: Soil – Class – 7 – Notes

An estimated 70 percent of the earth’s surface is covered with water, while the remaining 30 per cent constitutes land. The layer of the earth that is composed of soil and is influenced by the process of soil formation is called the pedosphere. But what exactly is soil and what is soil made of?

Technically, the soil is a mixture that contains minerals, organic matter, and living organisms. But broadly speaking, soil can refer to any loose sediment. Moreover, there are many types of soil that are distributed around the world and these are generally classified into the following:

1. Clay Soil
2. Sandy soil
3. Loamy Soil
4. Silt Soil

Chapter 10: Respiration in Organisms – Class – 7 – Notes

Respiration is a metabolic process that occurs in all organisms. It is a biochemical process that occurs within the cells of organisms. In this process, the energy (ATP-Adenosine triphosphate) is produced by the breakdown of glucose which is further used by cells to perform various functions. Every living species, from a single-celled organism to dominant multicellular organisms, perform respiration.

Chapter 11: Transportation in Animals and Plants – Class – 7 – Notes

The organ system of the body that is responsible for the transport of material throughout the body is called the circulatory system.

Chapter 12: Reproduction in Plants – Class – 7 – Notes

Reproduction means to reproduce. It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism. Reproduction enables and ensures the continuity of species, generation after generation. It is the main feature of life on earth.

Chapter 13: Motion and Time – Class – 7 – Notes

When we talk about motion or rest it is with reference to some point known as the origin. So, now with respect to the change in the position we have two quantities which can be used to describe that change in position. They are distance and displacement. So now the question is, what is the difference between the two?

Talking about distance, it is defined as the total path length covered during the motion. It can be represented only by magnitude. On the other hand, displacement is the shortest distance between the initial and final position. It requires both magnitude and direction for complete representation.

Chapter 14: Electric Current and its Effects – Class – 7 – Notes

Electric charge is the basic physical property of matter that causes it to experience a force when kept in an electric or magnetic field. An electric charge is associated with an electric field and the moving electric charge generates a magnetic field. Combination of electric and magnetic fields is known as the electromagnetic field. Interaction of the charges generates an electromagnetic force which is the foundation of Physics.

By the charge definition we know that charge is of two types; Positive and negative, commonly carried by charge carriers protons and electrons.

The subatomic particles or the particles of matter have various charges like:

• protons are positively charged
• electrons are negatively charged
• neutrons have zero charge

Chapter 15: Light – Class – 7 – Notes

When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray which lands upon the surface is said to be reflected off the surface. The ray that bounces back is called the reflected ray. If a perpendicular were to be drawn on a reflecting surface, it would be called normal. The figure below shows the reflection of an incident beam on a plane mirror.

Chapter 16: Water – A Precious Resource  – Class – 7 – Notes

Water is a precious natural resource. All living things need water for their survival. We cannot imagine life without water. Let it be animals or plants they require water to complete their daily metabolic activities. Plants require water to synthesize their food from the process of photosynthesis.

On average, an individual uses 600 to 700 litres in a day. We all can live without food for days together but cannot even imagine surviving without water, even plants become dry and shed their leaves without water.

Chapter 17: Forests – Our Lifeline   – Class – 7 – Notes

In ancient times, we used to live in forests. It met all our requirements for leading a normal life at that time. Now-a-days, we live in cities and towns far off from forests, so we really do not know the importance of forests in our life. It is a natural renewable resource, a habitat (home) to many forms of wildlife like bear, bison, jackal, deer, porcupine, elephant, etc.

Many trees like sal, teak, semal, Sheesham, neem, Palash, fig, khair, amla, bamboo, kachnar and many others are also found in the forests. The forest also contains insects, butterflies, honeybees and birds which help in palliation in the flowering plants of the forest in pollination.CBSE Syllabus for Class 7 Science for Academic Year 2020-21

Chapter 18: Wastewater Story    – Class – 7 – Notes

• Wastewater refers to all effluent from a household, hospitals, commercial organizations and institutions, industries and so on. It is also inclusive of agricultural, horticultural, stormwater and urban runoff, and aquaculture effluent.
• Effluent is used to refer to the liquid waste or sewage that is discharged into water bodies either from treatment plants or direct sources.CBSE Syllabus for Class 7 Science for Academic Year 2020-21

Download PDF of NCERT Solutions for Class 7 Science   

CBSE Notes for Class 7 Science Free Download for All Chapters

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