Match the following columns. Column A Column B a. SI unit of time i. Length, mass, time b. Rotational motion ii. Small unit of measuring length c. Three fundamental physical quantities. iii. Straight line motion d. A length which is 1 1000 th part of a metre iv. Improper unit of measurement e. Handspan v. 10 km f. A length equal to 10 , 000 m vi. Motion about an axis g. Rectilinear motion vii. millimetre h. Millimetre viii. second

a. SI unit of time - viii. second The SI unit of time is second. 60 seconds constitute one minute . b. Rotational motion - vi. motion about an axis When a moving object move about a fixed point or axis of rotation, it is said to have rotational motion. During a rotational motion, the distance of any point from the centre of the object remains the same. c. Three fundamental physical quantities - i. length, mass, time Three fundamental physical quantities are length, mass and time. Mass is the amount of matter present in an object. d. A length which is 1 1000 th part of a metre - vii. millimetre A length which is 1 1000 th part of a metre is millimetre. 1 centimetre is equal to 10 millimetres . e. Hand span - iv. improper unit of measurement Hand span is the distance between the tip of the thumb and the tip of the little finger of a fully stretched hand. Hand span is an improper unit of measurement, as the length of the body parts vary from person to person. f. length equal to 10 , 000 m - v. 10 km Length is the distance between any two points or places. The SI unit of length is metre. 1 kilometre is equal to 1000 metres . The length equal to 10 , 000 m is 10 km . g. Rectilinear motion - iii. straight-line motion An object is said to be in linear or rectilinear motion, if it moves from one position to another along a straight line in one direction only. h. Millimetre - ii. small unit of measuring length Millimetre is a small unit of measuring length. The thickness of a thin wire is expressed in millimetres. 1 decimetre is equal to 100 millimetres . Column A Column B a. SI unit of time viii. second b. Rotational motion vi. motion about an axis c. Three fundamental physical quantities. i. length, mass, time d. A length which is 1 1000 th part of a metre vii. millimetre e. Handspan iv. improper unit of measurement f. A length equal to 10 , 000 m v. 10 km g. Rectilinear motion iii. straight line motion vii. millimetre h. Millimetre ii. Small unit of measuring length

E M B I B E

Galaxy A Course in Science Book 6>Chapter 11 - Measurement and Motion>Put on your thinking cap>Q 3

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The motion of planets around the sun is curvilinear.

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Important Questions on Measurement and Motion

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6th CBSE

IMPORTANT

Galaxy A Course in Science Book 6>Chapter 11 - Measurement and Motion>Put on your thinking cap>Q 4

Match the following columns.

Column A	Column B
a. SI unit of time	i. Length, mass, time
b. Rotational motion	ii. Small unit of measuring length
c. Three fundamental physical quantities.	iii. Straight line motion
d. A length which is ${\frac{1}{1000}}^{th}$ part of a metre	iv. Improper unit of measurement
e. Handspan	v. $10 km$
f. A length equal to $10, 000 m$	vi. Motion about an axis
g. Rectilinear motion	vii. millimetre
h. Millimetre	viii. second