CHAPTER 2
Practice Set 2
Measurement
Grade 6 Science • Maharashtra State Board • 30 Marks
Q.1 (A) Choose the correct option.
4 Marks
(1) The distance from a person’s elbow to the tip of the middle finger was called a __________.
(2) Which unit is mainly used in scientific research experiments to measure temperature?
(3) A laboratory thermometer ranging from 0°C to 110°C is suitable for measuring __________.
(4) A digital thermometer operates using a small __________.
Q.1 (B) Identify me.
4 Marks
(1) I am the SI unit of length and my symbol is m. Who am I?
(2) I am the smallest division marked on an ordinary centimetre ruler. Who am I?
(3) I am a very fine tube through which mercury or coloured alcohol rises in a laboratory thermometer. Who am I?
(4) I am used to measure the temperature of air inside a room. Who am I?
Q.2 Find the odd one out and state the reason.
3 Marks
(1) Finger-width, fist, hand span, metre
(2) Celsius, Fahrenheit, Kelvin, Kilogram
(3) Ruler, metre scale, measuring tape, clinical thermometer
Q.3 Arrange the following steps in the correct order.
4 Marks
(1) Measuring body temperature with a digital thermometer
Note the reading after the beep.
Place the tip in the armpit so that it touches the skin.
Clean and dry the tip.
Wash your hands and press the reset button.
(2) Measuring the distance between two points using a ruler
Observe the mark aligned with the second point.
Keep the object or points in direct contact with the ruler.
Place the ruler’s starting point on the first point.
Q.4 Distinguish between the following.
4 Marks
| Comparison | First Type | Second Type |
|---|---|---|
| (1) Standard and non-standard measurement | Meaning and result of standard measurement | Meaning and result of non-standard measurement |
| (2) Clinical and laboratory thermometer | Purpose and suitable range of clinical thermometer | Purpose and suitable range of laboratory thermometer |
Q.5 Answer the following.
5 Marks
(1) Why was the Royal Cubit introduced in ancient Egypt?
(2) Explain how the markings on a 15 cm ruler represent centimetres and millimetres.
(3) Why should the liquid level in a thermometer be observed at eye level?
Q.6 Read the situations and answer.
4 Marks
(1) A child first keeps the right hand in hot water and the left hand in cold water. Both hands are then placed in the same bowl of mixed water. How may the water feel to each hand? What does this activity prove?
(2) Hundreds of people are entering an airport during an epidemic. Which thermometer should be used to check them? State two advantages of using it in this situation.
Q.7 Answer the questions about Anna Mani.
3 Marks
(1) By which title is Anna Mani known?
(2) What three atmospheric quantities can a radiosonde measure at high altitudes?
(3) How did Anna Mani’s work benefit India?
Q.8 Complete the conversions.
3 Marks
(1) 7 m = cm
(2) 12 cm = mm
(3) 4 km = m
CHAPTER 2
Practice Set 2 – Solutions
Measurement
Q.1 (A) Choose the correct option.
(1) Ancient unit from the elbow to the middle fingertip
Answer: (b) Cubit
(2) Temperature unit used in scientific research
Answer: (c) Kelvin
(3) Use of a thermometer ranging from 0°C to 110°C
Answer: (b) Boiling liquids or steam
(4) Power source of a digital thermometer
Answer: (b) Button cell
Q.1 (B) Identify me.
(1) SI unit of length with symbol m
Answer: Metre
(2) Smallest division on an ordinary centimetre ruler
Answer: Millimetre
(3) Fine tube inside a laboratory thermometer
Answer: Capillary tube
(4) Thermometer used for measuring room temperature
Answer: Wall thermometer
Q.2 Find the odd one out and state the reason.
(1) Finger-width, fist, hand span, metre
Answer: Metre
Metre is a standard unit. Finger-width, fist and hand span are non-standard units.
(2) Celsius, Fahrenheit, Kelvin, Kilogram
Answer: Kilogram
Celsius, Fahrenheit and Kelvin are units of temperature. Kilogram is a unit of mass.
(3) Ruler, metre scale, measuring tape, clinical thermometer
Answer: Clinical thermometer
A ruler, metre scale and measuring tape measure length or distance. A clinical thermometer measures body temperature.
Q.3 Arrange the steps in the correct order.
(1) Measuring body temperature with a digital thermometer
Wash hands and press reset
→
Place the tip in the armpit
→
Wait for the beep and note the reading
→
Clean and dry the tip
(2) Measuring the distance between two points
Keep the points in direct contact with the ruler
→
Align the starting point with the first point
→
Observe the mark aligned with the second point
Q.4 Distinguish between the following.
| Comparison | First Type | Second Type |
|---|---|---|
| Standard and non-standard measurement | Standard measurement: It uses fixed and uniform units. The measurement remains the same regardless of who measures it. | Non-standard measurement: It uses body-based units such as hand span, fist or footstep. Results may vary because people’s body sizes differ. |
| Clinical and laboratory thermometer | Clinical thermometer: It measures human body temperature. A range of 35°C to 42°C is sufficient. | Laboratory thermometer: It measures temperatures during laboratory experiments. A range of 0°C to 110°C is convenient for boiling liquids or steam. |
Q.5 Answer the following.
(1) Why was the Royal Cubit introduced?
Answer: An ordinary cubit depended on the distance from a person’s elbow to the tip of the middle finger. As this distance varied from person to person, the King’s cubit was established as a fixed Royal Cubit.
(2) Explain the centimetre and millimetre markings on a 15 cm ruler.
Answer: The ruler contains markings from 0 to 15. The distance between two consecutive big markings is one centimetre. Each centimetre is divided into ten equal small parts, and each small part is one millimetre.
(3) Why should a thermometer be observed at eye level?
Answer: The liquid level must be at eye level so that the correct mark aligned with it can be observed. Viewing it from above or below may result in an incorrect temperature reading.
Q.6 Read the situations and answer.
(1) Relative sensation activity
Answer: The mixed water may feel cold to the right hand that was previously in hot water. The same water may feel warm to the left hand that was previously in cold water.
This proves that touch gives only a relative sensation. It cannot tell the exact temperature.
(2) Checking people at a crowded airport
Answer: An infrared thermometer should be used.
It measures body temperature quickly and instantly from a short distance without touching the person.
Q.7 Answer the questions about Anna Mani.
(1) Anna Mani’s title
Answer: The Weather Woman of India
(2) Quantities measured by a radiosonde
Answer: Atmospheric pressure, temperature and humidity at high altitudes.
(3) Benefit of Anna Mani’s work
Answer: She designed instruments useful for weather forecasting and helped begin their use in India. Her contribution reduced India’s dependence on other countries for weather forecasting.
Q.8 Complete the conversions.
(1) 7 metres
Answer: 700 centimetres
7 × 100 = 700 cm
(2) 12 centimetres
Answer: 120 millimetres
12 × 10 = 120 mm
(3) 4 kilometres
Answer: 4000 metres
4 × 1000 = 4000 m