QUICK REVISION, CLASS 7, CH 1 to 10

 

1.Chlorophyll containing structure in a plant cell _______
2. How does gaseous exchange take place in earthworms?
3. An organism that obtains nutrients from decaying organic matter is called _______
4. Light energy is converted into chemical energy during the process of _______
5.The process in which complex food is broken down into simple, water soluble substances is called___________________________________
6.The set of teeth that grows during infancy is called ____________________________

7.  The process of selecting parent sheep for obtaining special characteristics in their offspring’s is called_______________

8. Heat is transferred in liquids by________________________
9. We receive heat from sun by__________________________

10.The most commonly used natural indicator is__________________________and is extracted from______________________________
11. Aqueous solution of baking soda is bitter in taste and feels soapy on touching because it contains______________________________

12. Show with the help of chemical & word equation the chemical reaction between Burning of magnesium ribbon.

13. Galvanisation is a process used to prevent the rusting of which of the following?
(a) Iron
(b) Zinc
(c) Aluminium
(d) Copper

14. The short-term variation which occur in the atmosphere is called________________________
15. Name the characteristic that enables the animals to blend with surroundings like skin color is ________________________

16. Match the following –

17. Breaking down of rocks by the action of wind, water and climate is called ___

18. The spaces between soil particle are known as ________

19. How are dust particles prevented from entering the lungs?

20. What is produced when human cells respire anaerobically?