CBSE Class 6

NCERT Solutions for Class 6 Science Chapter 14 Water are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 14 Water.

NCERT Solutions for Class 6 Science Chapter 14 Water

NCERT TEXTBOOK EXERCISES
(Pages 145-146)

Question 1.
Fill in the blanks in the following :

(a) The process of changing water into its vapour is called ______.
Answer:
Evaporation

(b) The process of changing water vapour into water is called ______.
Answer:
Condensation

(c) No rainfall for a year or more may lead to ______ in that region.
Answer:
Drought

(d) Excessive rains may cause ______.
Answer:
Floods

Question 2.
State for each of the following whether it is due to evaporation or condensation:
(a) Water drops appear on the outer surface of a glass containing cold water.
(b) Steam rising from wet clothes while they are ironed.
(c) Fog appearing qn a cold winter morning.
(d) Blackboard dries up after wiping it.
(e) Steam rising from a hot girdle when water is sprinkled on it.
Answer :
(a) Condensation
(b) Evaporation
(c) Condensation
(d) Evaporation
(e) Evaporation

Question 3.
Which of the following statements are “True”?

(a) Water vapour is present in the air only during the monsoon.
Answer:
False

(b) Water evaporates into the air from oceans, rivers, and lakes but not from the soil.
Answer:
False

(c) The process of water changing into its vapour, is called evaporation.
Answer:
True

(d) The evaporation of water takes place only in sunlight.
Answer:
False

(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooled.
Answer:
True.

Question 4.
Suppose you want to dry your school uniform quickly. Would spread it near an anghiti or heater help? If yes, how?
Answer :
Yes. Spreading uniform near anghiti or heater will help in drying because near anghiti or heater, the temperature is much higher and hence the process of evaporation of water is faster. This will lead to quick drying of the uniform.

Question 5.
Take out a cooled bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?
Answer :
The air around the cooled bottle of water gets cooled and water vapour present in it condenses into the water which collects as a puddle of water around the bottle.

Question 6.
To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Answer :
When we breathe out, water vapour also comes out with exhaled air. This water vapour when comes in contact with the glasses of spectacles makes them wet.

Question 7.
How are clouds formed?
Answer :
When the air containing water vapour moves up, it gets cooler and cooler. At sufficient heights, the air becomes so cool that the water vapour present in it condenses to form tiny drops of water called droplets. It is these tiny droplets that remain floating in the air and form clouds.

Question 8.
When does a drought occur?
Answer :
Drought occurs when it does not rain for a long period.

We hope the NCERT Solutions for Class 6 Science Chapter 14 Water help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 14 Water, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets.

NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets

NCERT TEXTBOOK EXERCISES
(Pages 134-135)

Question 1.
Fill up the blanks:
(a) Artificial magnets are made in different shapes such as ______, ______ and ______.
Answer:

1. U-shaped
2. Cylindrical
3. Base shaped

(b) The materials which are attracted towards the magnet are called ______.
Answer:
Magnetic

(c) Paper is not a ______ material.
Answer:
Magnetic

(d) In the olden day’s sailors used to find direction by suspending a piece of ______.
Answer:
Magnet

(e) A magnet always has ______ poles.
Answer:
Two

Question 2.
State whether the following statements are True or False:
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Answer :
(i) False
(ii) True
(iii) True
(iv) False
(v) True
(vi) False
(vii) False

Question 3.
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.
Answer :
Iron might have been used to make some part of a pencil sharpener.

Question 4.
Column I shows different positions in which one pole of a magnet is placed near that of the other. Column II indicates the resulting action between them for each situation. Fill in the blanks.

Answer :

Question 5.
Write any two properties of a magnet.
Answer:
Properties of a magnet are:

1. The magnet has two poles-north poles and a south pole.
2. Same poles repel each other and different poles attract each other.

Question 6.
Where are the poles of a bar magnet located?
Answer :
Poles of a bar magnet are located at the ends.
When a bar magnet is placed near some iron filings, we observe more iron filings clinging to the magnet near its ends.
See Figs. 13.3 and 13.4(a).


The ends of a magnet where maximum iron filings get clung, i.e., the attraction is strongest, are known as poles.

Question 7.
A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole located?
Answer :
We will suspend the bar magnet. It will come to rest in a north-south direction. The end of the magnet pointing towards the north direction is called a north pole.

Question 8.
You are given an iron strip. How will you make it into a magnet?
Answer :
We can convert an iron strip by repeatedly stroking it by a bar magnet systematically. Take the iron strip and keep it on a wooden table. Stroke it with one pole of a bar magnet in one direction. When you reach the other end of the iron strip, lift the magnet and bring the same pole back to the starting end of the iron piece, stroke again, in the same direction. Repeat this process about 30-40 times. After that check the iron strip whether the iron strip has now become a magnet. If not, continue the process for some more time. Remember the pole of the magnet and the direction of stroking is not to be changed. In the same way, the iron needle can also be converted into a magnet.

Question 9.
How is a compass used to find directions?
Answer :
The compass is kept at the place where we want to know the directions. Its needle indicates the north-south direction when it comes to rest. The compass is then rotated until the north and south marked on the dial are at the two ends of the needle. Thus north and south directions are identified.

Question 10.
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. The effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements given in Column I with those in Column II,

Answer :

We hope the NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 12 Electricity and Circuits are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 12 Electricity and Circuits.

NCERT Solutions for Class 6 Science Chapter 12 Electricity and Circuits

NCERT TEXTBOOK EXERCISES
(Pages 123-124)

Question 1.
Fill up the blanks:

(a) A device that is used to break an electric circuit is called _______.
Answer:
switch

(b) An electric cell has _______ terminals.
Answer:
Two

Question 2.
Mark ‘True’ or ‘False’ for the following statements:
(a) Electric current can flow through metals.
(b) Instead of metal wires, a jute string can be used to make a circuit.
(c) Electric current can pass through a sheet of thermocol.
Answer :
(a) True
(b) False
(c) False.

Question 3.
Explain why the bulb would not glow in the arrangement shown in Fig. 12.7.

Answer :
The bulb does not light up in the arrangement because the circuit is not complete.

Question 4.
Complete the drawing shown in Fig. 12.4 to indicate where the free ends of the two wires should be joined to make the bulb glow.
Answer :

Question 5.
What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.
Answer :
Electric switches are used to stop or start the flow of current. Electric gadgets having switches built into them are heaters, geysers, televisions, mixi, electric bells, fans, cooler, air conditioners, microwave ovens, etc.

Question 6.
Would the bulb glow after completing the circuit shown in Fig. 12.8, if instead of a safety pin we use an eraser?
Answer :
Yes, the bulb will light up after completing the circuit. No, the bulb will not glow if we use an eraser instead of safety pins.

Question 7.
Would the bulb glow in the circuit shown in Fig 12.9?

Answer :
In this circuit, the bulb is connected through a woolen thread with the negative terminal of the electrical cell. Since the woolen thread is not a conductor of electricity, it will not allow the electricity to flow through it that is from bulb to electrical cell. Thus the circuit remains incomplete and hence the bulb will not light up.

Question 8.
Using the “conduction tester” on an object it was found that the bulb begins to glow. Is that object a conductor or an insulator? Explain.
Answer :
The material of that object is a conductor as the bulb light up. It means that circuit is complete.

Question 9.
Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.
Answer :
While carrying out electrical repairs one must wear rubber gloves. This is because our body is a good conductor of electricity, and if there is any contact of naked wire with our naked hand it will be very dangerous. And if we are with rubber gloves on our hands, the rubber being an insulator will protect us from electric shock.

Question 10.
The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain, why?
Answer:
Wood or plastic are insulators and do not allow electricity to pass through them. Hence electricians must use screwdrivers, with wooden or plastic handles, when they carry out repairs to avoid electric shocks.

We hope the NCERT Solutions for Class 6 Science Chapter 12 Electricity and Circuits help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 12 Electricity and Circuits, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections.

NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections

NCERT TEXTBOOK EXERCISES
(Pages 113-114)

Question 1.
Rearrange the boxes given below to make a sentence that helps us understand opaque objects.

Answer :

Question 2.
Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.
Answer :

• Transparent objects: Air, water, a sheet of plane glass.
• Translucent objects: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.
• Opaque objects: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard.
• Luminous objects: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, kerosene stove, sun, firefly.
• Non-luminous objects: Include all
• transparent objects,
• translucent objects and
• opaque objects and moon.

Question 3.
Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
Answer :
Yes, there are many things which give a circular shadow if held in one way and a rectangular shadow if held in another way. For example, a cylinder, a circular disc, etc.

Question 4.
In a completely dark room, if you hold up a mirror in front of you, you see a reflection of yourself in the mirror?
Answer :
No, we will not see the image because there is no light.

We hope the NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances.

NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances

NCERT TEXTBOOK EXERCISES
(Page 106)

Question 1.
Give two examples each, of modes of transport used on land, water, and air.
Answer :

1. Land – Bus, car, bicycle.
2. Water – Motor-boat, ship.
3. Air – Aeroplane, Helicopter.

Question 2.
Fill in the blanks:

1. One meter is ………………………………. cm.
2. Five kilometers is ………………………………. m.
3. The motion of a child on a swing is ………………………………..
4. The motion of the needle of a sewing machine is ………………………………..
5. The motion of the wheel of a bicycle is ………………………………..

Answer :

1. 100
2. 5000
3. Periodic (oscillatory) motion
4. Periodic motion
5. Circular motion

Question 3.
Why can a pace or a footstep not be used as a standard unit of length?
Answer :
A pace or a footstep cannot be used as a standard unit of length because it is different for different persons. Hence correct measurement cannot be made.

Question 4.
Arrange the following lengths in their increasing magnitude: 1 meter, 1 centimeter, 1 kilometer, 1 millimeter.
Answer :
1 millimeter, 1 centimeter, 1 meter, 1 kilometer.

Question 5.
The height of a person is 1.65 m. Express it into cm and mm.
Answer:

(1) 1 m = 100 cm.
∴ 1.65 = 165 cm.

(2) 1 cm = 10 mm
∴ 165 cm = 1650 mm
Hence the height of a person is 165 cm or 1650 mm.

Question 6.
The distance between Radha’s home and her school is 3250 m. Express this distance into km.
Answer :
Given that,
Distance between Radha’s home and her school = 3250 m We have to find out distance in km.
We know that,
1000 m = 1 km
hence, 3250 m = \(\frac { 3250 }{ 1000 } \) km = 3.250 km.

Question 7.
While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the other end is 33.1 cm. What is the length of the needle?
Answer:
Length of the needle = Final reading – Initial reading
= 33. cm – 3.0 cm
= 30.1 cm.

Question 8.
Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
Answer :

• Similarity: Both the wheels of a bicycle and a ceiling fan execute a circular motion on a fixed axis.
• Dissimilarity: A bicycle also executes a rectilinear motion while a fan does not execute such motion.

Question 9.
Why would you not like to use a measuring tape made of an elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?
Answer :
We could not use an elastic measuring tape to measure distance because elastic measuring tape cannot measure correct distance. Because if the elastic measuring tape is stretched more then the distance will be less and if it stretched less than the same distance would be more.
The problems we would meet in telling about the distance we measured with an elastic tape are that the distance would be incorrect and would be different every time measured.

Question 10.
Give two examples of periodic motion.
Answer :
Two examples of periodic motion are:

• The motion of the earth around the sun.
• Oscillations of a pendulum.

We hope the NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 10 Motion and Measurement of Distances, drop a comment below and we will get back to you at the earliest.