Very Short Q & A:
Q1: Give two examples of mode of transport used on land.
Ans: Car and train.
Q2: What do you mean by term ‘measurement’?
Ans: The comparison of an unknown quantity with some known quantity is called measurement.
Q3: The known fixed quantity of measurement is called __________.
Ans: Unit
Q4: What is the full form of SI units?
Ans: International system of units
Q5: Give two example of each mode of transport used on water and air.
Ans: Ship and boat are the examples of mode of transport used on water. Spacecraft and aeroplane are mode of transport used on air.
Q6: What is SI unit of length?
Ans: Metre
Q7: The result of any measurement is expressed in two parts. One part is number and other part is ______.
Ans: Unit
Q8: In ancient India small length measurement used were angul and mutthi.(TRUE/FALSE)
Ans: True
Q9: The system of unit of measurement used now days is ___________.
Ans: International system of units(SI Units)
Q10: What is motion?
Ans: Change in position of an object with time is known as motion.
Q11: 1 metre is equal to __cm.
Ans: 100
Q12: We can measure length of a curved line directly by using a metre scale.(TRUE/FALSE)
Ans: False
Q13: What are different types of motion?
Ans: Rectilinear motion, circular motion and periodic motion.
Q14: When objects move along a straight line such motion is called ______ motion.
Ans: Rectilinear motion.
Q15: One centimetre is equal to _______millimetre.
Ans: 10
Q16: When an object moves in a circular path, such motion is called _________.
Ans: Circular motion
Q17: Give one example of periodic motion.
Ans: Motion of a pendulum is a periodic motion.
Q18: One kilometre is equal to __________ metre.
Ans: 1000
Q19: We can use __________ to measure length of a curved line.
Ans: Thread
Q20: A sprinter in 100m race move along a straight track. This type of motion is called _________.
Ans: Rectilinear motion
Q21: Give an example of circular motion.
Ans: Motion of a point marked on the blade of an electric fan is a circular motion.
Q22: Strings of guitar being played are in __________motion.
Ans: Periodic
Q23: In periodic motion, object repeats its motion. (TRUE/FALSE)
Ans: True
Q24: Hands of clock are example of_________ motion.
Ans: Circular
Q25: What is periodic motion?
Ans: An object repeats its motion after some time; this type of motion is called periodic motion.
Q26: 8 km is equal to ___m.
Ans: 8000
Q27: The length of a rope is 5m. Express it in cm.
Ans: 5 m = 500 cm
Q28: If a child is moving on swing, its motion is __________.
Ans: Periodic motion
Q29: 10 centimetres is equal to __________mm.
Ans: 100
Q30: A ball is rolling on the ground, rotating as well as moving forward on the ground. Therefore it undergoes _____________ and ___________ motion.
Ans: Rectilinear and rotational
Q31: If the person is walking along a straight road, its motion is _____________.
Ans: Rectilinear motion
Q32: Motion of falling stone is __________.
Ans: Rectilinear motion
Q33: How many millimetres are there in 20 centimetres?
Ans: 1 cm= 10 mm, so 20 cm = 20*10 = 200 mm
Q34: Rekha took one metre rope. She wants to know the length of rope in cm and mm. Answer.
Ans: The length of rope in cm is 100 and in mm is 1000.
Q35: 2 km is equal to _________m and ________cm.
Ans: 2000 m and 200000 cm
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