NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1

NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1 are part of NCERT Solutions for Class 6 Maths. Here we have given NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1.

BoardCBSE
TextbookNCERT
ClassClass 6
SubjectMaths
ChapterChapter 6
Chapter NameIntegers
Exercise Ex 6.1
Number of Questions Solved10
CategoryNCERT Solutions

NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1

Question 1.
Write opposite of the following:
(a) Increase in weight
(b) 30 km north
(c) 326 BC
(d) Loss of Rs. 700
(e) 100 m above sea level.
Solution.
(a) Decrease in weight
(b) 30 km south
(c) 326 AD
(d) Gain of Rs. 700
(e) 100 m below sea level

Question 2.
Represent the following numbers as integers with appropriate signs.
(a) An airplane is flying at a height two thousand meters above the ground.
(b) A submarine is moving at depth, eight hundred meters below the sea level.
(c) A deposit of rupees two hundred.
(d) Withdrawal of rupees seven hundred.
Solution.
(a) + 2000
(b) – 800
(c) + 200
(d) – 700.

Question 3.
Represent the following numbers on a number line:

(a) + 5
(b) -10
(c) + 8
(d) -7
Solution.
NCERT Solutions for Class 6 Maths Chapter 6 Integers 1

Question 4.
Adjacent figure is a vertical number line, representing integers. Observe it and locate the following points :
(a) If point D is + 8, then which point is – 8?
(b) Is point G a negative integer or a positive integer?
(c) Write integers for points B and E.
(d) Which point marked on this number line has the least value?
(e) Arrange all the points in p-decreasing order of value.
Solution.
NCERT Solutions for Class 6 Maths Chapter 6 Integers 2
(a) F
(b) negative integer
(c) B → + 4, E → 10
(d) E
(e) D, C, B, A, O, H, G, F, E.

Question 5.
Following is the list of temperatures of five places in India, on a particular day of the year.
Solution.

PlaceTemperature
Siachin10°C below 0°C………….
Shimla2°C below 0°C…………
Ahmedabad30°C above 0°C………….
Delhi20°C above 0°C………..
Srinagar5°C below 0°C………….

NCERT Solutions for Class 6 Maths Chapter 6 Integers 3
(a)
Write the temperature of these places in the form of integers in the blank column.
(b) Following is the number line representing the temperature in degree Celsius.
Plot the name of the city against its temperature.
(c) Which is the coolest place?
(d) Write the names of the places whose temperature are above 10°C.
Solution.
(a)

PlaceTemperature
Siachin10°C below 0°C– 10°C
Shimla2°C below 0°C– 2°C
Ahmedabad30°C above 0°C+ 30°C
Delhi20°C above 0°C+ 20°C
Srinagar5°C below 0°C– 5°C

(b)
NCERT Solutions for Class 6 Maths Chapter 6 Integers 4
(c) Siachin is the coolest place.
(d) Ahmedabad and Delhi.

Question 6.
In each of the following pairs, which number is to the right of the other on the number line?
(a) 2, 9
(b) -3,-8
(c) 0,-1
(d) – 11, 10
(e) -6,6
(f) 1,- 100
Solution.
(a) 2, 9
The number 9 is to the right of the number 2.
(b) -3,-8
The number – 3 is to the right of the number -8.
(c) 0,-1
The number 0 is to the right of the number – 1.
(d) – 11,10
The number 10 is to the right of the number -11.
(e) -6, 6
The number 6 is to the right of the number – 6.
(f) 1, -100
The number 1 is to the right of the number – 100.

Question 7.
Write all the integers between the given pairs (write them in the increasing order)
(a) 0 and – 7
(b) -4 and 4
(c) – 8 and -15
(d) – 30 and – 23.
Solution.
(a) 0 and – 7
The integers between 0 and – 7 in increasing order are – 6, – 5, – 4, – 3, – 2 and – 1.
(b) – 4 and 4
The integers between – 4 and 4 in increasing order are – 3, – 2, – 1, 0, 1, 2 and 3.
(c) – 8 and – 15
The integers between – 8 and – 15 in increasing order are – 14, – 13, – 12, – 11, – 10 and – 9.
(d) – 30 and – 23
The integers between – 30 and – 23 in increasing order are – 29, – 28, – 27, – 26, – 25 and – 24.

Question 8.
(a) Write four negative integers greater than – 20.
(b) Write four negative integers less than -10.
Solution.
(a) Four negative integers greater than 20 are – 19, – 18, – 17 and – 16.
(b) Four negative integers less than – 10 and 11,- 12,- 13 and -14

Question 9.
For the following statements write True (T) or False (F). If the statement is false, correct the state­ment.
(a)
-8 is to the right of- 50 on a number line.
(b) – 100 is to the right of – 50 on a number line.
(c) A smallest negative integer is – 1.
(d) – 26 is larger than -25
Solution.
(a) True (T)
(b) False (F); – 100 is to the left of – 50 on a number line.
(c) False (F); Greatest negative integer is – 1.
(d) False (F); – 26 is smaller than – 25.

Question 10.
Draw a number line and answer the following:
(a) Which number will we reach if we move 4 numbers to the right of-2?
(b) Which number will we reach if we move 5 numbers to the left of 1?
(c) If we are at -8 on the number line, in which direction should we move to reach -13?
(d) If we are at-6 on the number line, in which direction should we move to reach -l?
Solution.
(a) We will reach number 2.
(b) We will reach the number – 4.
(c) We should move in the left direction.
(d) We should move in the right direction

 

We hope the NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1 help you. If you have any query regarding NCERT Solutions for Class 6 Maths Chapter 6 Integers Ex 6.1, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.1

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.1 are part of NCERT Solutions for Class 6 Maths. Here we have given NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.1.

BoardCBSE
TextbookNCERT
ClassClass 6
SubjectMaths
ChapterChapter 5
Chapter NameUnderstanding Elementary Shapes
Exercise Ex 5.1
Number of Questions Solved7
CategoryNCERT Solutions

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.1

Question 1.
What is the disadvantage in comparing line segments by mere observation?
Solution :
Sometimes the difference in lengths betweenthe two line segments is not obvious. So, we are not always sure about our usual judgment.

Question 2.
Why is it better to use a divider than with a ruler, while measuring the length of a line segment?
Solution :
There may be errors due to the thickness of the ruler and angular viewing by using a ruler. These errors are eradicated by using a divider. So, it is better to use a divider, than a ruler, while measuring the length of a line segment.

Question 3.
Draw any line segment, say \(\overline { AB }\). Take any point C lying in between A and B. Measure the lengths of AB, BC and AC. Is AB = AC + CB? [Note : If A, B, C are any three points on a line such that AC + CB = AB, then we can be sure that C lies between A and B.]
Solution :
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 1
Length of AB = 7 cm
Length of BC = 3 cm
Length of AC = 4 cm
AC + CB = 4 cm + 3 cm = 7 cm
But AB = 7 cm
So, AB = AC A- CB.

Question 4.
If A, B, C are three points on a line such that AB = 5 cm, BC – 3 cm and AC – 8 cm, which one of them lies between the other two?
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 2
Solution :
AB + BC = AC, so, the point B lies between the point A and point C.

Question 5.
Verify, whether D is the mid-point of AG.
Solution :
AD = AB + BC + CD = 3 units
DG = OE + EF + FG = 3 units
∴ Yes ! D is the mid-point of AG.
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 3
Question 6.
If B is the mid-point of \(\overline { AC }\) and C is the mid-point of \(\overline { BD }\), where A, B, C, D lie on a straight line, say why AB = CD ?
Solution :
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 4
∴ B is the mid-point of \(\overline { AC }\)
∴ AB = BC …(1)
∴ C is the mid-point of \(\overline { BD }\)
∴ BC = CD … (2)
In view of (1) and (2), we get AB = CD.

Question 7.
Draw five triangles and measure their sides. Check in each case, if the sum of the lengths of any two sides is always less than the third side.
Solution :
(i) AB = 3.7 cm
BC = 3 cm
AC = 3.8 cm
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 5
Clearly, AB + BC > AC
BC + AC > AB
AC + AB > BC

(ii) AB = 3 cm
BC = 3 cm
CA = 3 cm
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 6
Clearly, AB + BC > AC
BC + AO AB
AC + AB > B C

(iii) AB = 4 cm
BC = 3 cm
AC = 5 cm
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 7
Clearly, AB + BC > AC
BC+ AC > AB
AC + AB > BC.

(iv) AB = 2 cm
BC = 2 cm
AC = 2.8 cm
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 8
Clearly, AB + BC > AC
BC + AC > AB
AC +AB> BC

(v) AB = 3 cm
BC = 4 cm
CA = 3 cm
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes 9
Clearly, AB + BC > AC
BC + AC> AB
AC + AB> BC
In each case, we observe that the sum of the lengths of any two sides is always greater than the third side.

 

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NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out

NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out.

BoardCBSE
TextbookNCERT
ClassClass 6
SubjectScience
ChapterChapter 16
Chapter NameGarbage in, Garbage out
Number of Questions Solved6
CategoryNCERT Solutions

NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out

NCERT TEXTBOOK EXERCISES
(Page 164)

Question 1.
(a) Which kind of garbage is not converted into compost by the red-worms?
Answer:
Garbage containing salt, pickles, oil, vinegar, meat, and milk preparations is not converted into compost by the red-worms.

(b) Have you seen any other organism besides red-worms, in your pit? If yes, try to find out their names. Draw pictures of these?
Answer:
Yes.

Question 2.
Discuss:

  1. Is garbage disposal the responsibility only of the government?
  2. Is it possible to reduce the problems relating to the disposal of garbage?

Answer:

  1. In most cities, the responsibility of garbage disposal is on Municipal Corporations and most of the people realize no responsibility of their own. We should realize that cleanliness is the collective responsibility of both, the people and the government. If people are not aware of their responsibilities, government alone cannot successfully manage the garbage disposal. We must have the correct ideas and we must try our best to make our surroundings clean. We should not throw our wastes here and there. We should manage disposal problems at the level of our mohallas rather than waiting for government efforts.
  2. Yes. It is possible to reduce the problems relating to the disposal of garbage. We can try 3‘R’ to reduce this problem. These are:
    • Reduce: We should minimize the use of things that produce wastes.
    • Reuse: We can reuse many things which we usually throw after using once.
    • Recycle: We can recycle the things that we usually throw and make many useful things, e.g., paper can be recycled to make paper baskets, etc.

Question 3.
(a) What do you do with the leftover food at home?
Answer:
We give this food to animals and sometimes we throw it in the dustbin.

(b) If you and your friends are given the choice of eating on a plastic plate or a banana leaf platter at a party, which one would you prefer and why?
Answer:
We would prefer a banana leaf platter because it can be used to form compost.

Question 4.
1. Collect pieces of different kinds of paper. Find out which of these can be recycled.
2. With the help of a lens look at the pieces of paper you collected for the above question. Do you see any difference in the material of recycled paper and a new sheet of paper?
Answer:
1. We can collect the following kinds of paper:

  • Old newspapers,
  • Magazines,
  • Used envelopes,
  • Notebooks, and
  • Shiny plastic-coated paper.

We can recycle all kinds of paper except shiny plastic-coated paper.
2. Yes, the surface of recycled paper is rough while that of the new sheet of paper is smooth.

Question 5.

  1. Collect different kinds of packaging material. What was the purpose for which each one was used? Discuss in groups.
  2. Give an example in which packaging could have been reduced?
  3. Write a story on how packaging increases the amount of garbage.

Answer :

  1. Children should discuss this in class.
  2. If instead of making packets of sugar, salt, pulses, etc. we can buy them loose in our cloth bag or paper bag.
  3. Packaging increases the amount of garbage because after use we throw the packaging material. Most of the packaging material cannot be converted into compost etc. Hence we are increasing the amount of garbage.

Question 6.
Do you think it is better to use compost instead of chemical fertilizers? Why?
Answer :
Yes, it is better to use compost instead of chemical fertilisers because it helps us in two ways :

  • It helps us to get rid of wastes.
  • It helps us to save a lot of money that is spent on buying expensive chemical fertilisers.

We hope the NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 16 Garbage in, Garbage out, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 15 Air Around us

NCERT Solutions for Class 6 Science Chapter 15 Air Around us are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 15 Air Around us.

BoardCBSE
TextbookNCERT
ClassClass 6
SubjectScience
ChapterChapter 15
Chapter NameAir Around us
Number of Questions Solved9
CategoryNCERT Solutions

NCERT Solutions for Class 6 Science Chapter 15 Air Around us

NCERT TEXTBOOK EXERCISES
(Pages 153-154)

Question 1.
What is the composition of air?
Answer :
Air contains 99% nitrogen and oxygen. The remaining 1% is carbon dioxide and a few other gases, water vapour and dust particles.

Question 2.
Which gas in the atmosphere is essential for respiration?
Answer :
Oxygen gas helps in the breakdown of the food to provide energy. This process is called respiration. Thus, oxygen helps in respiration.

Question 3.
How will you prove that air supports burning?
Answer :
To show that oxygen supports burning, we have to perform an activity as given below. Fix a candle about 6-8 cm long in the center of a trough or a plate having a raised rim. Now fill the trough or a plate with water to more than half of its height. Light the candle. Next, take a one-liter plastic water bottle and with the help of a sharp knife remove its base. It will serve the purpose of a vessel. Tighten its cap. Then place it over the candle as shown in Fig. 15.5. Observe carefully what happens to the burning candle and the water level. Light the candle again and perform this experiment with a two-liter plastic water bottle. Next, make several holes all over the surface of a smaller plastic bottle with the help of a hot screwdriver or nail. And repeat the experiment with this water bottle.
NCERT Solutions for Class 6 Science Chapter 15 Air Around us 1
The candle flickers out after some time in the first two conditions. The candle burns for a shorter period in the smaller bottle. We kept the air limited in the first two conditions. However, in the third experimental condition (b), air was allowed to come and go through the vessel. The candle burns continuously in the bottle having holes. We also see that, if not covered in any closed space, a candle continues burning till it is completely finished. This reflects that burning cannot take place without a continuous supply of air. We can conclude that air is necessary for burning things.

In the first two conditions, there was a rise in water level, while no rising of water would have been observed in the third set up. This indicates that, during burning, some amount of air was used up. The component of air that supports burning is called oxygen.

Question 4.
How will you show that air is dissolved in water?
Answer :
We take some water in a beaker and heat it slowly on a tripod stand. We see that well before the water begins to boil, tiny bubbles of air are seen on the inside of the beaker. This shows that air is dissolved in water.
NCERT Solutions for Class 6 Science Chapter 15 Air Around us 2
Question 5.
Why does a lump of cotton wool shrink in the water?
Answer :
In a cotton lump, a large amount of air is trapped between thin and light cotton fibres making it fluffy. When these fluffy lumps come in contact with water they shrink because the fibres get weight after wetting and the air escapes out from it.

Question 6.
The layer of air around the earth is known as ………………………
Answer :
Atmosphere.

Question 7.
The component of air used by green plants to make their food is …………………………….
Answer :
Carbon dioxide.

Question 8.
List five activities that are possible due to the presence of air.
Answer :
Air is very important for living beings. Its various activities are listed below:

  1. It helps in burning.
  2. It is essential for respiration in living beings.
  3. It is helpful in the movements of sailing yachts, gliders, parachutes, and air crafts.
  4. Air current makes the windmill rotate. The windmill is used to draw water from tube wells and to run flour mills. Windmill also generates electricity.
  5. Birds, bats, and insects fly in the air.
  6. Air also helps in the dispersal of seeds and pollens of flowers of several plants.
  7. Compressed air is used in tyres in vehicles.
  8. Nitrogen present in the air is used on a large scale to manufacture fertilizers.
  9. Helps in winnowing.
  10. Helps in hearing sounds.
  11. COpresent in air is used by plants in making food (photosynthesis).
  12. Activities like cloud formation, thundering, etc. occur in air.

Question 9.
How do plants and animals help each other in the exchange of gases in the atmosphere?
Answer :
Animals produce carbon dioxide during respiration and use oxygen whereas plants use carbon dioxide and produce oxygen during photosynthesis. In this way, plants and animals help each other in the exchange of gases in the atmosphere.

We hope the NCERT Solutions for Class 6 Science Chapter 15 Air Around us help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 15 Air Around us, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 14 Water

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.

BoardCBSE
TextbookNCERT
ClassClass 6
SubjectScience
ChapterChapter 14
Chapter NameWater
Number of Questions Solved8
CategoryNCERT Solutions

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.