Q. Why is the colour of clear sky blue ? Explain in brief.

Q. Explain that sunlight is essential for photosynthesis.

Q. Why do we need energy?

Q. The names of ten animals whose ears can be seen.

Q. Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing?

Q. Explain why:(a) Air is used to inflate tyres.(b) Steel is used to make railway lines.

Q. What is the relation between leaf venation and the type of roots?

Q. Write the name of planets according to their size ?

Q. Explain any three characteristics of commercial farming in India.

Q. Why is management considered pervasive?