CBSE Class 9   CBSE Class 9 Science


Topic Replies Activity
Which student reports that the solution turns green from blue colour? 2 April 5, 2019
What will be the least count of the spring balance? 2 April 5, 2019
Write the names of two methods used to separate the components of the mixture 2 April 5, 2019
Suggest any four points, which can be used during this identification 2 April 5, 2019
Differentiate between these two fishes, which help in their identification 2 April 5, 2019
Identify the organisms and the kingdom to which they belong 2 April 5, 2019
What kind of colloidal solution is butter? Name a technique to separate butter from cream 2 April 5, 2019
State the three rules proposed by Bohr and Bury, regarding the distribution of electrons in different orbits of an atom 2 April 5, 2019
Explain why the number of atoms in one mole of hydrogen gas is double the number of atoms in one mole of helium gas? 2 April 5, 2019
Calculate the ratio of the gravitational acceleration of the Earth due to the Sum with that of the Earth due to the Moon 2 April 5, 2019
Explain, why filter paper cannot be used to separate colloids? 2 April 5, 2019
Transportation of food from leaves to other plant parts 2 April 5, 2019
Name the protective tissues of plants. Explain them in detail with suitable examples 2 April 5, 2019
What will be the work done by him? 2 April 5, 2019
Write down the applications of ultrasonic waves 2 April 5, 2019
Differentiate between thrust and pressure. How does 1 Pascal differ from 1 Newton? 2 April 5, 2019
What values do you observe in the patient? 2 April 5, 2019
The distance travelled by the object in 10 s 2 April 5, 2019
What could happen if the needle was not sterilised? 2 April 5, 2019
Define the term inertia and its types. A ball and a car, which one has greater inertia? 2 April 5, 2019
Nitrogen-fixing bacteria are found in which plants and why? 2 April 5, 2019
Illustrate carbon cycle existing in nature 2 April 5, 2019
Discuss how can we contribute in the reduction of water pollution 2 April 5, 2019
If the cells of onion peel and RBCs are separately kept in hypotonic solution. What will take place? 2 April 5, 2019
Can you suggest a probable reason for this observation? 2 April 5, 2019
Calculate the distance between buildings 2 April 5, 2019
Find out wavelength, frequency and time period of the wave 2 April 5, 2019
What is the function of areolar tissues? 2 April 5, 2019
Calculate the number of particles 2 April 5, 2019
Why was it necessary to shake the bottle? 2 April 5, 2019