English Medium कक्षा ९ - CBSE Question Bank Solutions for Science

Define the following term: 

Cytosol

List one function of the following:

neuron

State two characteristics of nerve cells.

Draw and label a neuron.

Distinguish between the following pair in one or two sentences for axon and dendrite.

Explain the structure of neuron with the help of a labelled diagram.

Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.

The radius of an oxygen atom is 0.073 nm. What does the symbol ‘nm’ represent ?

A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.

Fill the following blanks with suitable words :

In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................

What is meant by the symbol of an element ? Explain with examples.

Fill in the blank with suitable word .
Sound waves are caused by ...................  

State the chemical symbols for the following elements :

Sodium, Potassium, Iron, Copper, Mercury, Silver.

What is meant by a chemical formula ? Write the formulae of one element and one compound.

Explain the difference between 2N and N2.

What do the following abbreviations stand for ?

1. O
2. 2O
3. O₂
4. 3O₂

What do the symbols, H₂, S and O₄ mean in the formula H₂SO₄ ?

What is the difference between 2H and H₂ ?

What is the significance of the formula of a substance ?