Select Page

Tools, Measurement and SI Units – Grade 7 Science Worksheets

Home >> 7th Grade Science Worksheets >> Tools, Measurement and SI Units

Premium Grade 7 Science Worksheets Package ($29)

The package has 5 free Worksheets & 34 Premium Worksheets with 15 questions each.

Access Worksheet Here

Tools, Measurements and SI Units

Measurements: Different parts of the World use different units of measurement. Units of measurement are important for of all physical quantity. Just like all objects are addressed by some name, physical quantities are known by the units of measurement. For example a piece of wire length is 3 meters.

1m or 1 meter is considered to be the usual standard of measuring. So , the wire of length is 3m more than the standard unit.

Here we understand that meter is the standard of measurement and the number 3 is the how lengthy the wire is.



Qualities of the Units of Measurement

The units of measurement should be:

  1. Physical quantity should be invariable. This means that it is not affected by any time or location. It remains the same everywhere. So, 3m wire is 3m wire everywhere every time. It’s constant.
  2. It should be understandable. It should be definitely easily accessible.
  3. All measuring units must be accepted universally in all nations.


Fundamental or Basic Units of Measurement

Like all human beings and things have names to be addressed, in the same way physical quantities also are addressed with respect to unit of measurement. They are fundamental quantities.



Derived Units of Measurement

Derived physical quantities are those that are dependent on the fundamental quantities

For instance length of a rope is a physical quantity; quantity of milk is a physical quantity. It is not dependent on any other factor.

On the other hand derived units are dependent on some other factor like speed of   a motor bike is 20miles/ hour. So here we see the speed is dependent on distance and time taken.


Systems of Units of Measurement

There are a set of fundamental units followed in various regions of the world even though fundamental units by default are independent of factors.

Here are some fundamental systems of measurements:


  1. FPS (foot, pound, second) system:this system is used generally in Great Britain and the countries it colonized. Here length is foot, mass is pound, time in seconds.
  1. The CGS (centimeter, gram, second) system: In the CGS length is measured in centimeters, the mass of any item is measured in grams and time in seconds
  1. MKS (meter, kilogram, second) system:  Here, the length is represented by meter, for mass it is kilogram and for time it is seconds.
  2. SI system:  In SI system length is measured in meter, mass in kilogram and time in seco The SI system or the International system of standards is now the universal system of measurement. It is the advanced metric system of measurement.


Tools used for measuring:

  • A balance is used to measure mass of an object.


  • To measure length a meter stick is used.


  • A graduated cylinder is used to measure volume of liquids


  • Force is measured by a spring balance.


Check Point                 

Fill in the blanks:

  1. Units of ……………………. are important for of all physical quantity.
  2. Physical quantity should be ……………………..
  3. All measuring units must be accepted ………………………. in all nations.
  4. The SI system or the …………………….. ……………… of standards is now the universal system of measurement.
  5. A graduated cylinder is used to measure the ………… of liquids
Answer Key
  1. Measurements
  2. Invariable
  3. Universally
  4. International system
  5. Volume

eTutorWorld offers affordable one-on-one live tutoring over the web for Grades 3-12, Test Prep help for Standardized tests like SCAT, SSAT, SHSAT, ISEE, AP and community college courses. You may schedule online tutoring lessons at your personal scheduled times, all with a Money-Back Guarantee. The first one-on-one online tutoring lesson is always FREE, no purchase obligation, no credit card required.

For answers/solutions to any question or to learn concepts, take a FREE Demo Session.

No credit card is required, nor are you under any obligation to make a purchase. Just schedule the FREE TRIAL lesson to meet a tutor & get help on any topic you want!

Our Learning by Design methodology focuses exclusively on the individual student. Our tutors are specially trained to identify and diagnose the needs and interests of each student and plan lessons accordingly.

Find more about our Personalized Online Tutoring  Learning Packages.

Give Your Child The eTutorWorld Advantage

Research has proven that personal online tutoring not just cements school learning, it helps build student confidence. Come to eTutorWorld for Expert Tutors and best K-12 Online Tutoring Services in the comfort and safety of your home at an affordable cost. Find a tutor online for Grade 3-12 Math, Science and English subjects and AP, SAT, SSAT and SCAT Test Prep help and test practice. Get free printable math and science worksheets in pdf format and SCAT Practice Tests. Sign up for a Free Trial Lesson Today!

© 2018 eTutorWorld - Online Tutoring and Test Prep | All rights reserved