Sorting materials into group (part -1) class 6

Sorting materials into group

Q.1. What do we mean by the term sorting?
Ans. Similarities help us to arrange things in the same group. Differences help us to arrange things into separate things.
This systematic arrangement of things on the basis of certain similarities or differences is called sorting or classification.

Q.2. Find the odd one out from the following:
          (a) Car, Magnet, Coin, Baby, Shoes.
(b)Laddu, Globe, Samosa, Sun, Orange.
Ans. (a) Chair, Bed, Table and Cupboard are non-living objects whereas baby is a living object. So, the odd one is baby.
(b) Laddu, Globe, Sun and Orange are Spherical objects, whereas Samosa is nearly conical shaped object. So, the odd one is Samosa.

Q.3. What are the advantages of sorting or classification?
Ans. The advantages of sorting or classification are:
  •  The classification of objects into groups makes it easier to locate them and work with them.
  • The classification of objects into groups helps in understanding them.

Popular posts from this blog

Sound (part -1) class 8

SOUND Q.1. What is sound? Ans. Sound is a form of energy, a sensation felt by our ears and makes us able to hear something. We hear many sounds around us like: sounds of talking, chirping of birds, ringing of bell, fluttering of clothes, machines etc. Q.2. What is the cause of sound? Ans. Vibration in an object produces sound. To and fro or back and forth motion of an object is called vibration. The energy required to make an object vibrate and produce sound is provided by some outside sources (like our hands, wind etc.). For example: We can feel vibrations by keeping our hand on our throat while speaking where vocal cords vibrate to produce sound. The sound of a ‘Dholak or tabla’ is produced by the vibrations of its stretched membrane on strucking. Q.3. Tabulate the Musical Instruments and their Vibrating Parts which vibrate to produce sound. Ans. S.No. Vibrating Part of Instrument Producing Sound Examples 1. Stretc...
Read more

Sound (part -3) class 8

Image
                                                                                                   SOUND Q.6.  Draw a well labeled diagram of human ear and explain its functioning? Ans. A human ear is divided into 3 parts: 1. Outer Ear : It is the only part of the ear that is visible to us. It consists of Pinna, Ear Canal and Ear Drum. The Pinna collects the sound waves and directs them to the ear canal. At the end of ear canal, there is ear drum which is slightly stretched membrane. When the vibrations strike the ear drum, it starts vibrating and transmits the sound to the middle ear. 2. Middle Ear : The middle ear is a cavity with three tiny important ear bones. These bones are M...
Read more

Sound (part -2) class 8

  SOUND Q.5. Give reasons: i) Sound can travel through a medium but it  cannot travel through a vacuum .  Ans. The substance through which sound travels is called a medium. Sound needs a material medium like solid, liquid or gas to travel and be heard but it can not travel through vacuum .  The sound waves involve the vibrations of the particles of the medium through which they travel. The layers of particles only vibrate back and forth, and transfer the sound energy from one layer to the next till it reaches our ear. Hence, the molecules of medium carry the sound waves from one place to another through their vibrations. Sound cannot travel through vacuum because vacuum has no molecules which can vibrate and carry sound waves.  ii) If we turn on a gas tap for few seconds, a person standing a few meters away will hear the sound of escaping gas first and the smell of gas reaches him afterwards. Ans. The sound of gas travels through the vibrations of air layers (no...
Read more