Name the SI unit of temperature.

• Kilogram (kg)

• Kelvin (K)

• Metre(m

• Seconds (s)

What is mean by measurement?

• distance between two things

• none of these

• Measurement is the process of comparing the unknown quantity of an object

• Quantities like length

Name some conventional method used for measuring the length of various object by people of olden days?

• hand span

• cubit

• foot step

• all of these

what are the different types of motion?

• Translatory motion

• Rectilinear motion

• Oscillatory motion

• none of these

Explain translatory motion

• When an object moves in a straight line

• If all parts of an object moves the same distance in a given time

• All of these

• none of these

What is light year

• An object is said to be in motion

• Light year is the unit used to measure very large distance

Example of rectilinear motion ?

• string of a guitar when plucked

• a car moving in a straight road

• a boy throwing a ball

• none of these

what is rotatory motion ?

• It does not moves

• when a body moves about a fixed axis without changing its position

• all of these

Differentiate between distance and displacement.

• Distance: The total length travelled from one point to another.Displacement: It is the shortest distance travelled from one point to another.

• Cloth merchants use iron/steel metre scale.

  Tailors use plastic metre scale tape.

  Carpenters use plastic metre tape and iron metre scale both.

• all of these

What is estimation?

• Magnitude and unit are the two parts which must be mentioned to state the results of a measurement.

• To guess the dimensions of an object without actual measuring is known as estimation. It is difficult to make near about correct estimate. It needs a lot of experience.

• A quantity adopted as a standard of measurement of a physical quantity is called unit.

• none of these