English Medium इयत्ता ९ - CBSE Question Bank Solutions

How do you differentiate between capture fishing, mariculture and aquaculture?

Earth moves around the sun with uniform velocity.

Mention four advantages of fishery.

What are the advantages of composite fish culture?

How do you differentiate between capture fisheries, inland fisheries and aquaculture?

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.