CBSE Revision Notes

NCERT Solutions For Class 10 Science Chapter 1

The chapter also deals with various types of chemical reactions like Combination reactions, Disproportion reaction, etc. This chapter plays an important role in science syllabus as the students will be able to understand the basic concepts of chemicals and their reactions which will help them to understand further topics in a better way. In this chapter, you will find a total of 20 questions with MCQs, balancing questions, short and long answer type questions, etc. Please refer NCERT Solutions For Class 10 Science Chapter 1 for more information.

NCERT Solutions For Class 10 Science

NCERT Solutions for Class 10 Science helps the students in understanding the complex topics and helps them while preparing for the Class 10 Board examination. With the help of these NCERT solutions for science students can analyze their performance level and helps them determine their strengths and weaknesses. These solutions also help you perceive the topic thoroughly which is very important from the exam point of view. Science is a subject that needs a clear understanding of the concepts and topics to score well in it. These solutions make the learning process simpler and easier for students as it is written in a simple language.

Wastewater Story Class 7 Extra Questions

CBSE Wastewater Story Class 7 Extra Questions

Water should be filtered before it is used for drinking, as it contains many impurities that cannot be easily seen with the naked eye. In order to have safe drinking water, it should be boiled.
Water gets contaminated by humans and it is not safe for drinking.
Drinking contaminated water results in diseases such as cholera, typhoid and diarrhoea. Polluted water can also prove fatal. Please refer Wastewater Story Class 7 Extra Questions for more information.

Forests: Our Lifeline Class 7 Extra Questions

CBSE Forests: Our Lifeline Class 7 Extra Questions

Forest serves as green lungs and water purifying systems in nature
Forestsplay a vital role in the preservation of the water cycle
Plants release a huge amount of water into the atmosphere through transpiration
By the process of transpiration and photosynthesis, forests maintain the temperature
Forests provide shelter for the animals and act as a protective camouflage. Forests provide shelter and food to the tribes living in the jungle. Please refer Forests: Our Lifeline Class 7 Extra Questions for more information.

Water: A Precious Resource Class 7 Extra Questions

CBSE Water: A Precious Resource Class 7 Extra Questions

Nearly 71 percent of the earth is covered by water in the form of oceans, seas, lakes, rivers, ice, ground water and moisture in the air.
Water that is fit for human consumption is called freshwater. Only 0.006 per cent of the water on the earth is actually available for our use.
Rainwater and water from other sources, like rivers and ponds, seep through the soil. Please refer Water: A Precious Resource Class 7 Extra Questions for more information.

Light Class 7 Extra Questions

CBSE Light Class 7 Extra Questions

The path of light is always straight and never curved. Light doesn’t bend.
The direction of light can be changed only by reflection.
The bouncing of light by any smooth surface, like a mirror, is called reflection of light.
Due to the reflection of light, the impression of an object formed in a mirror is called the image of the object. Please refer Light Class 7 Extra Questions for more information. .

Electric Current and Its Effects Class 7 Extra Questions

CBSE Electric Current and Its Effects Class 7 Extra Questions

Motion of our hands while running
Motion of a horse pulling a cart on a straight road.
Motion of a kid in a merry-go-round.
Motion of a child on a see-saw. Please refer Electric Current and Its Effects Class 7 Extra Questions for more information.

Motion and Time Class 7 Extra Questions

CBSE Motion and Time Class 7 Extra Questions

An object is said to be moving slowly if it covers less distance in a given time.
An object is said to be moving fast if it covers more distance in a given time.
The distance covered by an object in a unit time is defined as speed
The basic unit for time is second, and it can be calculated in minutes and hours, too, depending on the need. The basic unit for distance is metre. So, the unit for speed is metres per second (m/s). Please refer Motion and Time Class 7 Extra Questions for more information.

Reproduction in Plants Class 7 Extra Questions

CBSE Reproduction in Plants Class 7 Extra Questions

Reproduction is essential for continuation of the species from generation to generation.
Production of new individuals from the vegetative part of parent is called reproduction.
Reproduction is mainly of two types – sexual and asexual.
In sexual reproduction, the male and the female gametes fuse to form seeds that eventually develop into new plants.
There are different methods by which plants reproduce asexually. They are vegetative propagation, budding,fragmentation and spore formation. Please refer Reproduction in Plants Class 7 Extra Questions for more information.

Transportation in Animals and Plants Class 7 Extra Questions

CBSE Transportation in Animals and Plants Class 7 Extra Questions

All organisms need food, water and oxygen for survival. They need to transport all these to various parts of their body.
Blood is the fluid which flows in blood vessels. It transports substances like digested food from the small intestine to the other parts of the body. It carries oxygen from the lungs to the cells of the body. It also transports waste for removal from the body. Please refer Transportation in Animals and Plants Class 7 Extra Questions for more information.