201920 7 Science Sreeja


Weather, climate and adaptation of animals to climate

  • adaptations to different climate, polar region, desert and rain forests
  • Comparison of different weather conditions of hometown and Bangalore and reasons for different weather conditions.

Water: a precious resources

  • Water table and its depletion
  • Water cycle
  • Agricultural practices



  • Hot and cold
  • Measuring temperature
  • Clinical and laboratory thermometer
  • Transfer of heat
  • Conductors and insulators
  • Water heater, refrigerator


  • Types
  • Profile
  • Properties,
  • Formation
  • Composition
  • Erosion
  • Conservation
  • Soil-borne diseases


Forests: our lifeline

  • Canopy
  • Crown
  • Decomposers
  • Deforestation
  • Humus
  • Regeneration
  • Seed dispersal
  • Soil erosion
  • Under storey

Fibre to fabric (animal fibres)

  • Wool
  • Processing fibres into wool
  • Silk


Wind storms and cyclone(Briefly about wind direction, use of satellites)

  • Air exerts pressure
  • High speed winds are accompanied by reduced air pressure
  • Air expands on heating
  • Wind currents are generated due to uneven heating on the earth
  • Thunder storms and cyclones
  • Destruction caused by cyclones
  • Effective safety measures
  • Advanced technology had helped


  • Physical and chemical changes (Recap)
  • Examples
  • Introduction of word equations

Acids, Bases and Neutralisation

  • Acids and alkali
  • Is it an acid or alkali?
  • The pH scale
  • Neutralisation
  • Neutralisation in action
  • Investigating acids and alkalis


Nutrition in plants

  • Photosynthesis
  • Other modes of nutrition in Plants
  • Saprotrophs
  • How Nutrients are Replenished in the Soil

November and December


  • Rectilinear propagation
  • Reflection of light
  • Images formed with mirrors and lenses (Qualitative)
  • Pinhole camera


Nutrition in animals

  • Mode of nutrition
  • Human digestive system
  • Nutrition in other animals such as amoeba and grass eating animals)

Motion and Time

  • Speed
  • Measurement of time
  • Measurement of speed
  • Distance time graph


Respiration in Organisms

  • Need for respiration.(recap)
  • Mechanism.
  • Breathing in animals.
  • Breathing underwater.

Electric Current and its Effects

  • Symbols of electrical components (Recap)
  • Heating effect of electric current
  • Magnetic effect of electric current
  • Electromagnet
  • Electric bell


Transportation in Animals and Plants (in brief)

  • Circulatory system.
  • Excretion in animals.
  • Transport of substance in plants.

Reproductive system in plants

  • Modes of reproduction
  • Pollination, fruits and seeds, seed dispersal)
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