NCERT Exemplar for Class 7 Science Solutions

There are 18 chapters in total in the science syllabus of class 7. With this many chapters, it is difficult to give attention to every topic, hence one should give more attention to important topics, The most important topics in each chapter of class 7 are listed below.

Chapter 1 - Nutrition in Plants 

The chapter entails the nutritional cycle of the plant kingdom and their process of making food for themselves. Important topics in Chapter “Nutrition in Plants” are -

• Photosynthesis - Its Definition, equation, and Importance.

• Conditions under which Photosynthesis can occur.

• Other methods of plants to obtain Nutritions.

Chapter 2 - Nutrition in Animals

This chapter talks in detail about the human digestive system and the nutritional cycle of animals. Important topics from the Chapter “Nutrition in Plants” are -

• Human Digestive System

• Teeth and tongue

• Digestion in Amoeba

• Digestive process in ruminants

Chapter 3 - Fibre to Fabric

The chapter is about natural fibers such as silk and wool and the processing they undergo to be converted into cloth fabrics. Important parts from here are - 

• Silk and Wool

• Sericulture

• Caterpillars, cocoon, and pupa

• Shearing, scouring, and sorting

• Rearing and breeding of silkworm and sheep.

Chapter 4 - Heat

The concept of heat has been thoroughly covered in this chapter. The important points from the chapter “Heat” will be.

• Temperature

• Thermometers in clinic and laboratory.

• Conduction and radiation.

• Conductors and insulators.

Chapter 5 - Acids, Bases, and Salts 

This chapter brings the Fascinating world of Chemistry to the student. The chapter provides the student an introduction to Acids, Bases, and Salts. Important topics in acids, bases, and salts are -

• Acids

• Bases

• Salts

• Indicators and Litmus paper

• Formation of salt by Neutralisation

Chapter 6 - Physical and Chemical changes

In this everyday changing world, many changes occur in your surroundings. These changes can be physical or chemical changes. The chapter tries to clarify the difference between them.

Important topics -

• Physical changes

• Chemical changes

• Rusting

• Crystallization

Chapter 7 - Weather, Climate, and Adoption of animals to climate

The chapter tries to answer the many questions regarding natural phenomena like why we have different climates in different parts of the earth, why weather changes after a certain period of time, and how different animals adapt to these changes. Important topics from here are -

• Climate and weather. And factors affecting them.

• Adaptation of animals to the different climatic situations.

Chapter 8 - Wind, Storms, and Cyclones.

Like the previous chapter, this chapter also deals with natural phenomena. The chapter mainly covers wind-related phenomena like Storms and cyclones. 

Important topics from the chapter “Wind, Climate and Cyclones” are -

• Wind and wind currents and wind flow patterns.

• Monsoon

• Storms and Cyclones

• Hurricane, Typhon, and Tornadoes

• Cyclones watch and warning

Chapter 9 - Soil

The Importance of soil on the earth is explained in detail in this chapter of Soil. There are many types of soil with different compositions. Importance points of soil are- 

• Soil profile

• Types of Soil and their characteristics

• Different Properties of soil

• Relation of crops with the soil

Chapter 10 - Respiration in Organisms

The chapter Discusses the process of respiration in plants and animals in detail. The student will learn about the organs used in the breathing process. 

Important topics-

• Mechanism of breathing

• Breathing rate

• Human respiration system

Chapter 11 - Transportation in animals and plants

Nearly all multi-cellular organisms have a transportation system inside their bodies for the transportation of nutrients in them. This transportation system is covered in this chapter.

Important topics

• Diagram of Heart and Functioning

• Human excretory system

• Blood vessels and their types

• Xylem and Phloem

Chapter 12 - Reproduction in Plants

The Plants’ procedure of reproduction is thoroughly discussed in this chapter.

Important Topics

• Asexual Reproduction and its nodes

• Pollination

• Fertilization in plants

• Seed dispersal

Chapter 13 - Motion and time 

This chapter is the basis of higher-class physics, so the students should make sure to gulp it down. The student got an insight into the world of time and motion in this chapter.

Important topics

• Slow and fast motion

• Linear and periodic motions

• Uniform and non-uniform 

• Average and Instantaneous speed

• Oscillation

• Time periodic

• Distance time graph

• Odometer and speedometer

Chapter 14 - Electric current and its effects

This chapter forms the basis of high-class physics. It entails the knowledge about the electric currents, which powers all the electric devices.

Important topics-

• Electric components and Circuit

• Electric cell and batteries

• Heating and magnetic effect of current

• Electromagnets and electric bells

Chapter 15 - Light

Light is just traveling energy and its movement and speed depends on a lot of factors, which is all discussed in this chapter

Important topics-

• Properties of Light and Reflection

• Images formed by Plane and spherical Mirror

• Images formed by spherical lens

• Dispersion of white light into seven colors.

Chapter 16 - Water - A precious resource

Water is an elixir of life, every Living form requires water to survive. But due to human activities, this precious resource is becoming scarce. The chapter tries to spread awareness about this scarcity.

Important Topics-

• Distribution of water

• Forms of water

• GroundWater

• Water table

• Infiltration

• Aquifer

• Water management (water Harvesting)

• Reason for the depletion of water

• Habits for saving water

Chapter 17 - Forests: Our Lifeline

Forests are very necessary for our existence on earth and their numbers are continuously reducing due to human interference.

Important topics-

• Role and importance of Forests

• Decomposers and their examples

Chapter 18 - Wastewater Story

The chapter puts emphasis on the water conversation and reduction of waste generation. It also goes into the details of the process of treating wastewater to obtain clean water from it.

Important Topics-

• Wastewater

• Containments in water

• Components of sewage

• Wastewater treatment plant (WTP)

• Measures to reduce waste generation.

• Sanitation