Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 1 - Measurement [Latest edition]

Which one the following system of units is the British System of unit?

Electric current is a ______ quantity

SI unit of temperature is ______

Luminous intensity is the intensity of ______

Closeness of two or more measured values is called as ______

Which one of the following statement is wrong?

The solid angle is measured in _______.

The coldness or hotness of a substance is expressed by _______.

_______ is used to measure electric current.

One mole of a substance contains _______ atoms or molecules.

The uncertainty in measurement is called as _______.

The closeness of the measured value to the original value is _______.

The intersection of two straight lines gives us _______.

Temperature is a measure of total kinetic energy of the particles in a system.

If one coulomb of charge is flowing in one minute, it is called ‘ampere’

Amount of substance gives the number of particles present in a substance.

Intensity of light coming from a candle is approximately equal to one ‘candela’.

Quartz clocks are used in GPS devices.

Angle formed at the top of a cone is an example for ‘plane angle’

The number 4.582 can be rounded off as 4.58.

Match the following.

Consider the statement given below and choose the correct option.

Assertion: The SI system of units is a suitable system for measurements.

Reason: The SI unit of temperature is kelvin

Consider the statement given below and choose the correct option

Assertion: Electric current, amount of substance, luminous intensity are the fundamental physical quantities.

Reason: They are independent of each other.

Consider the statement given below and choose the correct option.

Assertion: Radian is the unit of solid angle.

Reason: One radian is the angle subtended at the center of a circle by an arc of length equal to its radius.

How many base quantities are included in the SI system?

Give the name of the instrument used for the measurement of temperature.

What is the SI unit of luminous intensity?

What type of oscillations are used in atomic clocks?

Mention the types of clocks based on their display.

How many times will the ‘minute hand’ rotate in one hour?

How many hours are there in a minute?

What is measurement? How is a measurement expressed?

Name the three scales of temperature.

Define - Ampere.

What is electric current?

What do you mean by luminous intensity?

Define – mole.

What are the differences between plane angle and solid angle?

List out the base quantities with their units.

Write a short note on different types of clocks.

Your friend was absent from school yesterday. You are enquiring about his absence. He told that he had a fever and it was measured to be 100^oC. Is it possible to have a 100^oC fever? If he is wrong, try to make him understand.