Class 9 Science - Chapter Tissues NCERT Solutions | Give three features of cardiac muscles.

Diagrammatically show the difference between the three types of muscle fibres.

What does a neuron look like?

Draw a labelled diagram of a neuron.

Complete the table:

Where is apical meristem found?

What are the functions of the stomata?

What is a tissue?

How many types of elements together make up the xylem tissue? Name them.

What are the constituents of phloem?

Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

State the universal law of gravitation.

Which of the following are matter?

Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?

What is meant by a pure substance?

How does the sound produced by a vibrating object in a medium reach your ear?

In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium observations are in agreement with the law of conservation of mass.

sodium carbonate + ethanoic acid → sodium ethanoate + carbon dioxide + water

What are canal rays?

State any two conditions essential for good health.

How is our atmosphere different from the atmospheres on Venus and Mars?

Why is the cell called the structural and functional unit of life?

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

Composition of the nuclei of two atomic species X and Y are given as under
                           X        Y
Protons      =       6        6
Neutrons    =       6        8

Give the mass numbers of X and Y. What is the relation between the two species?

How do substances like CO2 and water move in and out of the cell? Discuss.

Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.

How does the force of gravitation between two objects change when the distance between them is reduced to half ?

Which one of the following is a correct electronic configuration of sodium?
(a) 2,8        (b) 8,2,1        (c) 2,1,8        (d) 2,8,1.

Which organelle is known as the powerhouse of the cell? Why?

Why are the ceilings of concert halls curved?

How does the atmosphere act as a blanket?