Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.

Maria took some dry moong seeds and soaked them overnight in water. Then she boiled the seeds. After boiling she drained extra water, wrapped the boiled seeds in a wet cloth and set them aside for 28 hours. After 28 hours, she observed that seedsdid not germinate. Which of the following is the reason for the failure of germination?

Read the given passage and answer the questions. Suhana wanted her house to be white washed, She bought 10 kg of quicklime from the market and dissolved it in 30 L of water. On adding lime to water, she observed that the water started boiling even when it was not being heated. Which of the following statements is correct about the above reaction based on your observations? (i) It is an endothermic reaction. (ii) It is an exothermic reaction (iii) The pH of the resulting solution will be more than seven. (iv) The pH of the resulting solution will be less than seven.

NASA announced that the Spitzer infrared space telescope had found a system of seven Earth -sized planets,three of which are in its star's habitable zone, the region around a star where liquid water can survive on the surface. The star is called TRAPPIST-1 . It is a small red dwarf star 39 light - years from Earth . Initial observatons of the systems forund three planets by their transits - that is , by observing the dimming they cause when they pass in front of their star._____________. They are not too close to the star , so liquid water won't boil away, They are not too far away , so liquid water will not permanently freeze.

Anahat is an eight year old girl who has just begun to learn swimming. At the moment she is in the swimming pool. Suddenly, Anahat finds that her earring has fallen into the water. It appears to her that the earring has not gone too deep. So, she begins to go further into swimming pool to retrieve her earring. Her trainer, who has been watching her movements, does not allow Anahat to go further and pulls her out of the swimming pool quickly. (a) Why does it appear to Anahat that her earring has not gone too deep in water ? Name the phenomenon involved. (b) Why does the trainer not allow Anahat to go further in the swimming pool ? (c) Give one example of the effect of phenomenon involved in the above episode in which a glass slab is used. (d) What values does the trainer show in the above episode ?