201920 7 Science Sreeja
Table of Contents
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June
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
July
Heat
- Hot and cold
- Measuring temperature
- Clinical and laboratory thermometer
- Transfer of heat
- Conductors and insulators
- Water heater, refrigerator
Soil
- Types
- Profile
- Properties,
- Formation
- Composition
- Erosion
- Conservation
- Soil-borne diseases
August
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
September
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
Changes
- 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
October
Nutrition in plants
- Photosynthesis
- Other modes of nutrition in Plants
- Saprotrophs
- How Nutrients are Replenished in the Soil
November and December
Light
- Rectilinear propagation
- Reflection of light
- Images formed with mirrors and lenses (Qualitative)
- Pinhole camera
January
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
February
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
March
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)