Weather, Climate and Adaptations of Animals of Climate — Science STD 7 — Question

Observe the given figure and answer the following.

1. Name the birds shown in figure.
2. What are these birds doing and why?
3. These birds live in which region?

Differentiate between two modes of transfer of heat, i.e. convection and conduction.

Neha went to the market with her mother to buy a silk saree for her grandmother. The shopkeeper was showing sarees of different varieties of silk but her mother wanted to take only a pure silk saree and not an artificial one. Neha was confused that how to distinguish between a pure silk and an artificial silk saree. But her mother helped her in selecting a pure silk saree for her grandmother and she was quite elated about that.
Now, answer the following Questions:

1. How her mother distinguished between pure silk saree and an artificial silk saree?
2. Is the pure silk saree more costly than an artificial one?
3. What values are shown by Neha’s mother?

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/ basic/ neutral) of each solution.

Fill in the blanks and complete the story selecting words from the box given here. cold, demand, leaders, dry, hot, scarcity, workers, wet, oceans, harvesting, rivers Rajasthan is a _________ and dry place. The challenge of natural _______ of water was met by a successful experiment. A band of social ________ had transformed a _________ area into a green place. They have revived five dried-up ________ by constructing water ___________ structures.

State the characteristics of the image formed by a plane mirror.

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.

Little Rishi (a student of class VI) was watching his favourite cartoon serial on television, while eating lunch. Suddenly he started getting hiccups. His elder brother Shubham, who was sitting near by him, gave him a glass of water and suggested not to eat too fast in a hurry. Little Rishi got confused as he had heard that 'hichki' comes when someone remembers.
He asked his father. His father smiled and explained him that it is only a myth. He also explained him the proper scientific reason behind it.
(i) What is hiccup?
(ii) Why do we get hiccup?

What are stomata? Give two functions of stomata.