Complete Explanation of CBSE Notes
What is Congruence?
Two objects that are exact copies of one another are known as congruent objects. This relation of two objects being congruent is known as congruence. Please refer Congruence of Triangles Class 7 Notes for more revision notes.
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.The difference between the lengths of any two sides of a triangle is lesser than the third side. This property is useful in knowing if it is possible to draw a triangle when the lengths of the three sides are known. Please refer The Triangle and its Properties Class 7 Notes for more revision notes.
Chapter 5 Lines and angles discusses the various angles formed when two lines meet. Before we get into this discussion, let us recall the following terminologies.
An equation, also known as the algebraic equation, is a condition on a variable such that two expressions in the variable have equal value. A variable’s value is not fixed, it takes the value of different numerical values. An equation has an equality sign. The equality sign proves that the value of the expression to the left-hand side or LHS is equal to the value of the expression to the right-hand side or RHS. An equation remains the same, even when the L.H.S and R.H.S of the equation are interchanged. Please refer Simple Equations Class 7 Notes for more revision notes.
The collection, recording and presentation of data help us organise our experiences and draw inferences from them. In chapter 3 Data handling Class 7 Notes, you will learn about different kind of graphs and data. Now let us discuss the methodical procedure to follow before documenting data and extracting information from them.
The Fractions and Decimals Class 7 Notes, discusses the multiplication and division of fractions and decimals. The three types of fractions are:
What are Integers?
Integers are a collection of numbers formed by whole numbers and their negatives. Integers can be represented on a number line as follows:
In the given number line, the ascending order of the listed numbers is -16, -9, -4, 0, 3, 8, 14.
The descending order is 14, 8, 3, 0, -4, -9, -16. Please refer Integers Class 7 Notes for more revision notes.
Maths is one of the most important subjects for students in class 7 and it is important for students to constantly improve their knowledge in the subject as well as strengthening their foundation on that subject. Being good at maths will be crucial for students if they are planning a future in fields of science and commerce.
Thus to help students achieve their desired outcome, we are offering free CBSE Notes for Class 7 Maths Notes here so that they can also develop a strong foundation in maths. The notes given here will help students get a clear understanding of all the concepts as well as develop better math skills. The notes cover all topics given on the CBSE class 7 math syllabus.
In chapter 18 of class 8 science, we study the harmful changes taking place in our surroundings and their effects on our lives. The substance that contaminates air and water are known as pollutants. Air gets polluted from natural sources smoke and dust arising from forest fires or volcanic eruptions. Pollutants such as power plant and automobile exhaust and burning of firewood are man-made pollutants. Carbon dioxide, nitrogen oxides, carbon monoxide, methane and sulphur dioxide are the major pollutants of air. Increasing levels of carbon dioxide lead to global warming. Please refer Pollution of Air and Water Class 8 Notes for more revision notes.
The planets, the stars, the moon and other bodies in the sky are known as celestial bodies. Astronomy is a branch of science that studies celestial bodies and their associated phenomena. The change in the shape of the moon every day is one of the observations of celestial bodies that we can make. The day on which the whole disc of the moon is visible is known as the full moon day, while the day on which only a small portion of the moon is visible is known as the new moon day.
Various shapes of the bright part of the moon seen during a month are known as the phases of the moon. The phases of the moon occur as we can only see the part of the moon that reflects the light of the Sun towards us. Please refer Stars and the Solar System Class 8 Notes for more revision notes.
CBSE Revision Notes