9th class science-Matter in our surroundings

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Class 9th Science  Matter in our surroundings
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Class 9th Science  Matter in our surroundings

• Matter in our surroundings is the first Chapter
  of Class 9th science  and one of the very
  interesting chapter.
• What is Matter? How do we classify Matter? These
  are the first question that strikes in the mind
  of a Class 9th science  student.
• So if we have to define Matter we will say-
• Matter is anything which occupies space and has
  mass.
• e.g ..

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Class 9th Science  Matter in our surroundings

• So, anything that we see, feel, touch around us
  is matter. A major requirement for anything to be
  categorized as a matter is that it should occupy
  space and have mass.
• On the basis of physical and chemical properties,
  Matter is classified as below

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Class 9th Science  Matter in our surroundings

• Characteristics of Particle of Matter
• Matter Particles are very very small-Gulaal
  particles are very small even if we drop a pinch
  of gulaal in a drum, entire water colour changes,
  hence we can say that the particles of matter are
  very very small.
• Matter Particles have space between them-If we
  take a glass of water and dissolve a spoon of
  sugar, then the water level will not change, this
  shows that there are spaces between water
  particles in which sugar particles accommodates.
• Matter Particles are constantly moving-If we
  light an incense stick in one room than the
  fragrance spreads to other rooms as well, hence
  we can say that matter particles are moving
  constantly.
•  

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Class 9th Science  Matter in our surroundings

• Matter Particles attract each other-If we will
  try to break sugar cube and iron nail with force.
  Sugar cube, will break easily iron nail will not
  break even after applying force. This shows that
  the force of attraction is very strong.
• Note-Force of attraction is maximum in the solid
  particles and minimum in the gaseous particles.
• Animated lectures on Matter of Class 9 is
  available at Takshila Learning. For NCERT
  Solutions for Class 9 and CBSE question paper for
  Class 9, kindly visit www.takshilalearning.com
• Or Call Us 8800999280/8800999284/011-45639131