1. Nutrition in Plants

• Mode of nutrition in plants
• Photosynthesis — food making process in plants
• Other modes of nutrition in plants
• Saprotrophs
• How nutrients are replenished in the soil

2. Nutrition in Animals

• Different ways of taking food
• Digestion in humans
• Digestion in grass-eating animals
• Feeding and digestion in amoeba

3. Fabric to Fabric

• Wool
• Silk

4. Heat

• Hot and cold
• Measuring temperature
• Laboratory thermometer
• Transfer of heat
• Kinds of clothes we wear in summer and winter

5. Acids, Bases, and Salts

• Acids and bases
• Natural indicators around us
• Neutralization
• Neutralization in everyday life

6. Physical and Chemical Changes

• Physical changes
• Chemical change
• Rusting of iron
• Crystallization

7. Weather, Climate, and Adaptations of Animals to Climate

• Weather
• Climate
• Climate and adaptation

8. Winds, Storms, and Cyclones

• 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
• Thunderstorms and cyclones destruction caused by cyclones
• Effective safety measures
• Advanced technology has helped

9. Soil

• Soil teeming with life
• Soil profile
• Soil types
• Properties of soil
• Moisture in soil
• Absorption of water by soil
• Soil and crops

10. Respiration in Organisms

• Why do we respire?
• Breathing
• How do we breathe?
• What do we breathe out?
• Breathing in other animals
• Breathing underwater
• Do plants also respire?

11. Transportation in Animals and Plants

• Circulatory system
• Excretion in animals
• Transport of substances in plants

12. Reproduction in Plants

• Modes of reproduction
• Sexual reproduction
• Fruits and seed formation
• Seed dispersal

13. Motion and Time

• Slow or fast
• Speed
• Measurement of time
• Measuring speed
• Distance-time graph

14. Electric Current and its Effects

• Symbols of electric components
• Heating effect of electric current
• Magnetic effect of electric current
• Electromagnet
• Electric bell

15. Light

• Light travels along a straight line
• Reflection of light
• Right or left!
• Playing with spherical mirrors
• Images formed by lenses
• Sunlight — white or colored?

16. Water: A Precious Resource

• How much water is available
• Forms of water
• Groundwater as an important source of water
• Depletion of the water table
• Distribution of water
• Water management
• Effect of water scarcity on plants

17. Forests: Our Lifeline

• Visit a forest

18. Wastewater Story

• Water, our lifeline
• What is sewage?
• Water freshens up — an eventful journey
• Waste water treatment plant (wwtp)
• Better housekeeping practices
• Sanitation and disease
• Alternative arrangement for sewage disposal
• Sanitation at public places