Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements Text Book Back Questions and Answers

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements

Samacheer Kalvi 6th Science Measurements Text Book Back Questions and Answers

 

BOOK EXERCISE

I. Choose the correct answer

Question 1.

The height of a tree can be measured by

(a) Metre scale

(b) Metre rod

(c) plastic ruler

(d)Measuring tape.

Answer:

(d) Measuring tape.

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Question 2.

The conversion of 7 m into cm gives

(a) 70 cm

(b) 7 cm

(c) 700 cm

(d) 7000 cm

Answer:

(c) 700 cm

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Question 3.

Quantity that can be measured is called ………

(a) Physical quantity

(b) Measurement

(c) Unit

(d) Motion.

Answer:

(b) Measurement

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Question 4.

Choose the correct one

(a) km > mm > cm > m

(b) km> mm> m > cm

(c) km>m>cm>mm

(d) km > cm > m > mm

Answer:

(c) km > m > cm > mm

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Question 5.

While measuring length of an oject using a ruler, the position of your eye should be

(a) Left side of the point.

(b) Vertically above the point where the measurement is to be taken.

(c) Right side of the point.

(d) Anywhere according to one’s convenience.

Answer:

(b) Vertically above the point where the measurement is to be taken.

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II. True or false.

We can say that mass an object is 126 kg True

Length of one’s chest can be measured by using metre scale. False

Ten millimetres makes one centimetre. True

A hand span is a reliable measure of length. False

The SI system of units is accepted everywhere in the world. True

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III. Fill up the blanks:

1. SI unit of length is symbolically represented as ……….. Metre

2. 500 gm = …0.5. kilogram.

3. Distance between Delhi and Chennai can be measured in …Kilometre

4. 1 m = …100 cm.

5. 5 km = …5000. m.

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IV. Analogy

Sugar: Beam Balance, Lime Juice?

Answer:

Graduated cylinders.

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Height of a person: Cm: Length of your sharpened pencil lead?

Answer:

mm

Milk: Volume; vegetables?

Answer:

Weight

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V . Match the following .

1.  Length of the fore arm   a. metre

2. SI unit of length   b. second

3. Nano  c. 103

4. SI Unit of time   d. 10-9

5. Kilo   e. Cubit

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V . Match the following .

1.  Length of the fore arm   a. cubit

2. SI unit of length   b. metre

3. Nano  c. 10-9

4. SI Unit of time   d. second

5. Kilo   e. 103

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VI. Arrange in increasing order of unit

1 Metre, 1 Centimetre, 1 Kilometre, and 1 Millimetre.

Answer:

1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

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IX. Answer in a word or two.

Question 1.

What is the full form of the SI system?

Answer:

An International System of unit

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Question 2.

Name any one instrument used for measuring mass.

Answer:

Beam Balance

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Question 3.

Find the odd one out: Kilogram, Millimetre, Centimetre, Nanometre

Answer:

Kilogram.

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Question 4.

What is the SI unit of mass?

Answer:

Kilogram

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Question 5.

What are the two parts present in a measurement?

Answer:

multiple

sub

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VIII .  Find the answer for the  following

questions within the grid .

1. 103   is one  millimetre   

2. SI Unit of time is Second

3. Cross view of reading a measurement leads to parallax       

4.Time is the one what a clock reads.

5.  Mass      is the amount of substance present in an object.

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6. Accurate    can be taken to get the final reading of the recordings of different students for a single measurement.

7.   Length     is a fundamental  quantity.

8.  Odometer      shows the distance covered by an automobile

9. A tailor uses tape       to take measurements to stitch the cloth.

10. Liquids are measured with this physical quantity. Litre

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IX. Answer briefly.

1.Define measurement.

The comparison of an unknown quantity with some known quantity is known as measurement.

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2. Define mass.

Mass is the measure of the amount of matter in an object.

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3. The distance between two places is 43.65 km. Convert it into metre and cm.

Answer:

(a) Convert km into metre

1 km = 1000m

∴ 43.65 km = 43.65 × 1000 = 43650.00 = 43650

= 43650 m.

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(b) Convert km into cm.

1 km = 1000 m

1 m = 100 cm

1 km = 1000 × 100 cm

1 km = 100000 cm

∴ 43.65 km = 43.65 × 100000 = 4365000.00

= 4365000 cm.

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4. What are the rules to be followed to make accurate measurement with scale?

Answer:

Take care to write the correct submultiple.

Always keep the object in parallel to the scale.

Start the measurement from ‘0’ of the scale.

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XI. Solve the following:

Question 1.

The distance between your school and your house is 2250 m. Express this distance in kilometre.

Answer:

Distance between school and house is 2250 m.

1000 m = 1 km

∴ 2250 m = 2250 ÷ 1000 = 2.25 km.

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Question 2.

While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?

Answer:

Sharpened pencil Reading at one end = 2.0 cm.

Sharpened pencil Reading at the other end = 12.1 cm.

Length of the pencil = Difference between two ends.

= 12.1 cm. – 2.0 cm.

= 10.1 cm.

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XII. Write in detail:

Question 1.

Explain two methods that you can use to measure the length of a curved line.

Answer:

Measuring the length of a curved line  method – using a string.

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Draw a curved line AB on the paper.

Place a string along the curved line.

Make sure that the string covers every bit of the curved line.

Mark the points where the curved line begins and ends on the string.

Now stretch the string along the length of a meter scale.

Measure the distance between two markings of the string.

This will give the length of a curved line.

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Tamilnadu Samacheer Kalvi 3rd Science Solutions Term 1 Chapter 4 Science in Everyday life Text Book Back Questions and Answers

 

Tamilnadu Samacheer Kalvi 3rd Science Solutions Term 1 Chapter 4 Science in Everyday life

Samacheer Kalvi 3rd  Science Guide Science in Everyday life  Text Book Back Questions and Answers

I. Say whether the following statements are true or false.

1. When we boil water, bacteria are destroyed. True

2. Idli is cooked by the process called steaming. True

3. Thermometer is used to measure pressure. False

4. Refrigerator helps to keep things cold. True

5. Garlic relieves hiccups and nausea. True

6. Boiling point of water is 100°C. True

II Circle the name of the things from which idli is made.

Rice   Groundnut   Chilli  Black gram

 Red gram    Water   Salt    Pepper

Sugar   Fenugreek

IV. Which of these are safe to do at home? Put (√) or cross (x) in the box.

1. Touching electrical appliances - X

2. Playing with sharp objects - X

3. Playing in kitchen - X

4. Keep safe distance from the gas stove and cylinder  - √

V. Answer in a word or sentence.

1. How do you store fruits and vegetables for a longer period?

A Refrigerator (Fridge) is a popular home appliance for preserving food.

V. Answer in a word or sentence.

2. Name the instrument  used to measure temperature.

Thermometer is an instrument used for measuring body  temperature

V. Answer in a word or sentence.

3.How is idli prepared?

Idli is prepared using idli cooker.

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V. Answer in a word or sentence.

4. What is the use of black pepper?

It is a great remedy for colds, coughs.

V. Answer in a word or sentence.

5. Which kitchen medicine is called the poor man‛s antibiotic?

Garlic is called the poor man‛s antibiotic.

VI. Answer the following.

1.Write the uses of boiled water.

vDestroys germs

v Improves digestion

vPrevents us from the infection of waterborne diseases

VI. Answer the following.

2. Write the advantages of pressure cooker.

qSaves time

qMinimizes the usage of fuel and saves energy

qRetains nutrients in food

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