Measurements Book Back Questions 6th Science Lesson 1

6th Science Lesson 1

1] Measurements

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

On the moon where the gravitational force is less than that is on the earth, the weight will reduce but the mass will remain same. The moon’s gravitational pull is one sixth of the earth’s pull. Thus objects weigh six times lighter on the Moon than on the Earth.

In the earlier days, people used sand clock and sundial to measure the passage of time during day time. The shadow cast by a stick can be used to estimate time. A vessel having a small hole is filled with sand and it is used as a clock. The sand in the vessel is allowed to come down and it is used to estimate the time.

An odometer is a device used for indicating distance travelled by an automobile. The metric system or standard set of units was created by the French in 1790. A ruler or scale, used now-a-days to measure length, was invented by William Bedwell in the 16^th century. A standard metre rod made of an alloy of platinum and iridium is placed at the Bureau of Weights and Measures in Paris. National Physical Laboratory in Delhi has a copy of this metre rod. One kilogram is equal to the mass of a certain bar of platinum-iridium alloy that has been kept at the International Bureau of Weights and Measures in Sevres, France since 1889.

Choose the correct answer:

1. The height of a tree can be measured by

(a) Metre scale

(b) Metre rod

(c) Plastic ruler

(d) Measuring tape

2. Conversion of 7 m into cm gives __________

(a) 70 cm

(b) 7 cm

(c) 700 cm

(d) 7000 cm

3. Quantity that can be measured is called ____________

(a) Physical quantity

(b) measurement

(c) unit

(d) motion

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

5. While measuring the length of an object 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) any where according to one’s convenience

Fill in the blanks:

1. SI unit of length is _____________

2. 500 gm = __________ kilogram

3. The distance between Delhi and Chennai can be measured in ________________

4. 1 m = ______________ cm

5. 5 km = _____________ m.

State True or False. If False, correct the statement.

1. We can say that mass of an object is 126 kg.

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

3. Ten millimetre makes one centimetre.

4. A hand span is a reliable measure of length.

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

Complete the analogy:

1. Sugar: Beam Balance: Lime Juice: ________?

2. Height of a person: cm :: Length of your sharpened pencil lead : ____________?

3. Milk: Volume :: Vegetables: ____________?

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

Arrange the following in the increasing order of unit.

1. Metre, 1 centimetre, 1 kilometre, and 1 millimetre.

Find the answer for the following questions within the grid.

1. 10^-3 is one _____________

2. SI unit of time is __________

3. Cross view of reading a measurement leads to _____________

4. _____________ is the one what a clock reads.

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

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

7. ______________ is a fundamental quantity.

8. _____________ shows the distance covered by an automobile.

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

10. Liquids are measured with this physical quantity.

Answers:

Choose the correct answer:

1. Measuring Tape 2. 700cm 3. Physical quantity 4. km > m > cm > mm

5. Vertically above the point where the measurement is to be taken.

Fill in the blanks:

1. Meter 2. 0.5kilogram 3. Kilometre 4. 100cm 5. 5000m

State True or False:

1. True

2. False

Correct Statement: Length of one’s chest can be measured using measuring tape.

3. True

4. False

Correct Statement: Hand span and cubit are not particular measurements as it varies from person to person.

5. True

Complete the Analogy:

1. Measuring Jar 2. mm 3. Mass

Match the following

1. Cubit 2. Metre 3. 10^-9 4. Second 5. 10³

Arrange the following in the increasing order of unit:

1 millimetre, 1 centimetre, 1 meter, 1 kilometre

Find the answers for the following questions within the grid:

1. Millimetre 2. Second 3. Error 4. Time 5. Mass 6. Average 7. Length 8. Odometer 9. Tape 10. Litre