Observe the image. Is it rational? Why?

What is the smallest rational number?

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?

Emma is observing an image of a pencil through a convex lens, if she wants to see the erect image of the pencil she should place the pencil

Answer the following questions: Why are many images obtained in a kaleidoscope?

Observe the figure and answer the following questions: Is it an asexual or sexual method of reproduction? Why?

Answer the following question: Why do we need different types of telescopes for space observation?

Observe the bodies of the frog,duck and tortoise. Why doesn't a duck get wet in water?

While observing a section many scattered vascular bundles could be seen. Teacher said but in spite of this large number the stem cannot grow in girth. Why?