Which changes do you notice in leather articles and gunny (jute) bags during the rainy season?

Why do those leather articles not get spoilt during the summer or winter?

Why do these articles not get spoilt during the summer or winter?

Which sounds do you hear during the recess in the school ?

Which effects of heat do you know ?

Answer the following Question: Have you noticed static electricity any time during winter season ? In what actions did you find it ?

Which changes can be observed during adolescence ?

Answer the following question in short : Why is lightning not seen every day during the rainy season?

Answer the following questions: Take a large shining metal spoon. Bring the deeper(i.e., concave) surface closer to your face. Can you see your image? Now take the spoon away from your face. What change do you observe in the image? Now repeat the activity by turning the convex surface of the spoon to the front. What changes do you notice in the image?

Read the statements given below and identify the concepts explained in them. Name the optical phenomenon behind occurrence of circles made of seven colours on the roads during rainy season.