In India, class 10 is the most important year of schooling as it is the year where students give their common exam of whose grades is used for admission to higher grades. One of the important subjects is science which, if not taught properly will not help the children when they go to higher grades. […]
The Central Board of Secondary Education (CBSE) was established in 1962 by the Government of India with the sole purpose of creating a central education system for all the students in the country. The CBSE syllabus was restricted to only government schools like the Kendriya Vidyalaya but later started including private schools which needed to […]
1. Define tissue.
Answer
The tissue is defined as a group of cells which are similar in structure and work together to perform a particular function is known as tissue.
2. In multi-cellular organisms, what is the use of tissues?
Answer
The use of tissue in multi-cellular organisms is to provide structural and mechanical strength as well as to allow […]
1) Who discovered cells, and how was it discovered ?
Answer:
Robert Hooke discovered cells in 1665 while examining a thin slice of cork through a self-designed microscope. He saw that the cork resembled the structure of a honey comb consisting of many little compartments. Those small boxes are called cells.
2) Why the cell is called the […]
NCERT Solutions for Class 9 Science Chapter 4 – Structure of the Atom
1)What are canal rays?
Soln:
Canal rays are radiations which are positively charged and was the key in the discovery of proton, another positively charged subatomic particle.
2) If an atom contains one electron and one proton, will it carry any […]
General Question: Illustrate the relationship between a mole, Avogadro’s number and Mass.
Q1. A reaction is taking place wherein, 5g of sodium carbonate reacts with 7.2 gm of ethanoic acid. The products are 4.2g carbon dioxide, 3g water and 5g […]
NCERT Solutions for Class 9 Science Chapter 1 – Matter in our Surroundings
Text Questions:
1) Which of the following is matter? Chair, air, love, smell, hate, almond, thought, cold, cold drink, smell of perfume.
Soln:
Chair, Air, Almond, Cold drink.
2) Give a reason for the following observation: The smell of hot sizzling food […]
CBSE Syllabus is the list of topics and subtopics to be covered in the course of study during an academic year. CBSE syllabus includes the summary and gist of content to be gone through during teaching and learning process in a particular grade or class. CBSE issues syllabus booklets for classes 9, 10, 11 and 12. […]
Exercise – 13.1
Q.1: Q and R are events such as P(Q) = 0.6 , P(R) = 0.3, P(Q∩R) = 0.2. Determine the value of P(QR) and P(
Short answer questions:
Sol. Here , edge of there metallic cubes are 3 cm, 4cm, and 5cm.
Volume of single cube =
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