CHAPTER 2
Practice Set 5
Measurement
Grade 6 Science • Maharashtra State Board • 30 Marks
Q.1 (A) Choose the correct option.
4 Marks
(1) What does a milk-measuring cup measure?
(2) The traditional unit called “mushti” refers to a __________.
(3) Which position of the eye gives the correct reading on a ruler?
(4) Which range is sufficient for a thermometer used to check human body temperature?
Q.1 (B) Answer in one word or one term.
4 Marks
(1) The traditional unit called “angul”:
(2) The traditional unit called “hasta”:
(3) Material used with a ruler to measure the length of a curved surface:
(4) Instrument used by a sports teacher to mark playground boundaries:
Q.2 Replace the incorrect scientific term and rewrite.
4 Marks
(1) One metre is divided into 100 equal parts called millimetres.
(2) A distance equal to 1000 metres is called one centimetre.
(3) Doctors use a laboratory thermometer to check a patient’s body temperature.
(4) The SI unit of temperature is Fahrenheit.
Q.3 Classify the following.
4 Marks
(1) Standard units of length
Metre, hand span, centimetre, footstep, kilometre
(2) Non-standard units of length
Fist, millimetre, finger-width, hand span, metre
(3) Units of temperature
Kelvin, kilogram, Celsius, second, Fahrenheit
(4) Instruments for measuring length
Ruler, digital thermometer, metre scale, measuring tape
Q.4 Complete the table with suitable units and instruments.
4 Marks
| Object | Suitable Unit | Suitable Instrument |
|---|---|---|
| Length of a saree | ________________ | ________________ |
| Length of a classroom | ________________ | ________________ |
| Thickness of a newspaper | ________________ | ________________ |
| Thickness of a pencil | ________________ | ________________ |
Q.5 Answer in one or two sentences.
4 Marks
(1) What is a unit of measurement?
(2) How can a thread and ruler be used together to measure a curved surface?
(3) Why must an appropriate measuring instrument be selected according to the object?
(4) In which two temperature units can a digital thermometer show body temperature?
Q.6 Solve the measurement problems.
4 Marks
A science textbook has 200 pages. The total thickness of all its pages, excluding the covers, is 20 mm.
(1) Calculate the thickness of one page.
(2) Write the formula used.
A tightly pressed bundle of 100 notes has a total thickness of 10 mm.
(3) Calculate the thickness of one note.
(4) Why is a bundle measured instead of trying to measure one note directly?
Q.7 Give scientific reasons.
3 Marks
(1) A ruler should be read from directly above the required mark.
(2) A limited range of 35°C to 42°C is sufficient for a clinical thermometer.
(3) The thickness of one page is found by measuring many pages together.
Q.8 Identify the quantity being measured.
3 Marks
(1) A cloth seller uses a measuring tape before cutting cloth.
(2) A doctor uses a thermometer to examine a patient.
(3) A vegetable vendor uses a balance while selling vegetables.
CHAPTER 2
Practice Set 5 – Solutions
Measurement
Q.1 (A) Choose the correct option.
(1) Quantity measured using a milk-measuring cup
Answer: (a) Amount of milk
(2) Meaning of “mushti”
Answer: (b) Fist
(3) Correct eye position for reading a ruler
Answer: (a) Directly above the required mark
(4) Range sufficient for body temperature
Answer: (c) 35°C to 42°C
Q.1 (B) Answer in one word or one term.
(1) Angul
Answer: Finger-width
(2) Hasta
Answer: Hand span
(3) Material used with a ruler for a curved surface
Answer: Thread
(4) Instrument used to mark playground boundaries
Answer: Metre tape
Q.2 Replace the incorrect scientific term.
(1) One metre is divided into 100 equal parts called millimetres.
Correct term: Centimetres
One metre is divided into 100 equal parts called centimetres.
(2) A distance equal to 1000 metres is called one centimetre.
Correct term: Kilometre
A distance equal to 1000 metres is called one kilometre.
(3) Doctors use a laboratory thermometer for body temperature.
Correct term: Clinical or medical thermometer
Doctors use a clinical or medical thermometer to check body temperature.
(4) The SI unit of temperature is Fahrenheit.
Correct term: Kelvin
The SI unit of temperature is Kelvin.
Q.3 Classify the following.
(1) Standard units of length
Metre, centimetre and kilometre
(2) Non-standard units of length
Fist, finger-width and hand span
(3) Units of temperature
Kelvin, Celsius and Fahrenheit
(4) Instruments for measuring length
Ruler, metre scale and measuring tape
Q.4 Suitable units and instruments.
| Object | Suitable Unit | Suitable Instrument |
|---|---|---|
| Length of a saree | Metre | Measuring tape or metre scale |
| Length of a classroom | Metre | Measuring tape |
| Thickness of a newspaper | Millimetre or a smaller range | Screw gauge |
| Thickness of a pencil | Millimetre | Vernier caliper |
Q.5 Answer in one or two sentences.
(1) What is a unit of measurement?
Answer: The unit in which a measurement is expressed is called the unit of measurement.
(2) How can a thread and ruler measure a curved surface?
Answer: Place the thread along the curved surface and mark its beginning and ending points. Straighten the thread and measure the distance between the marks using a ruler.
(3) Why must an appropriate instrument be selected?
Answer: Objects differ in size, shape and the accuracy required. Using an instrument suited to the object helps obtain a convenient and accurate measurement.
(4) Units shown by a digital thermometer
Answer: Celsius or Fahrenheit, according to the need.
Q.6 Solve the measurement problems.
(1–2) Thickness of one textbook page
Formula: Thickness of one page = Total thickness of all pages ÷ Total number of pages
Thickness of one page = 20 mm ÷ 200
Thickness of one page = 0.1 mm
Answer: The thickness of one page is 0.1 mm.
Thickness of one page = 0.1 mm
(3–4) Thickness of one note
Formula: Thickness of one note = Total thickness of the bundle ÷ Number of notes
Thickness of one note = 10 mm ÷ 100
Thickness of one note = 0.1 mm
Answer: The thickness of one note is 0.1 mm.
A single note is too thin to measure conveniently with an ordinary ruler. Measuring many notes together gives a larger, clearer reading.
Thickness of one note = 0.1 mm
Q.7 Give scientific reasons.
(1) A ruler should be read from directly above the mark.
Answer: Looking from the left or right can make the mark appear shifted. Looking directly above the mark helps record the correct reading.
(2) A range of 35°C to 42°C is sufficient for a clinical thermometer.
Answer: Human body temperature normally lies near 37°C. Therefore, the limited range from 35°C to 42°C is sufficient for measuring body temperature.
(3) Many pages are measured together to find one page’s thickness.
Answer: One page is too thin to measure accurately using an ordinary ruler. Measuring the total thickness of many pages and dividing it by their number gives the thickness of one page.
Q.8 Identify the quantity being measured.
(1) Cloth seller using measuring tape
Answer: Length of the cloth
(2) Doctor using a thermometer
Answer: Body temperature
(3) Vegetable vendor using a balance
Answer: Mass of the vegetables