Page 124 - ICSE Chemistry 6

ATTEMPT AND SCORE

ASSESSMENT SHEET 1

A. Fill in the blanks.
1. ______________ is a branch of science that deals with the study of composi on and proper es of
substances, and how they react when combined with each other.
2. ______________ performed the famous ‘gold foil experiment’.
3. ______________ are the chemicals used to kill insects that aff ect the growth of crops.

4. ______________ such as penicillin and ampicillin are used to treat infec ons.
5. Advancement in ______________ has increased the average life expectancy of human beings.
6. The various states of ma er are the result of diff erent arrangements of their ______________.
7. A ______________ represents one atom of an element.

8. ______________ is either absorbed or given out when a compound is formed.
9. ______________ due to its high mel ng point is used to make fi laments of light bulbs.
10. ______________ helps to separate components of a mixture that diff er in size.
11. ______________ is the measure of quan ty of ma er contained in a substance.

12. ______________ refers to the intermingling of par cles of diff erent substances on their own.
13. Liquids like milk and water which mix with each other are called ______________ liquids.
14. The constant temperature at which a liquid changes into solid is called its ______________.
15. A ______________ change is a change in which new substances are formed.

16. ______________ forms an important part of the water cycle.
17. The con nuous circula on of water from the earth to the atmosphere and back again is called
______________.
18. A substance that gets dissolved in a liquid is called a ______________.
19. Asolu on is said to be ______________ when it cannot dissolve any more of the solute at a par cular
temperature.
20. These days ozone is used to sterilize water and the process is called ______________.

21. The sustenance of life is due to a combina on of gases that collec vely form the ______________.
22. ______________ cons tutes about 21% of the air.
23. Photosynthesis is carried out only by green plants because they contain a green-coloured pigment
called __________________.
24. The trapping of the heat energy of the sun by greenhouse gases present in the earth’s atmosphere
is called _________________.
25. Fer lisers can be replaced with ___________________ to reduce air pollu on.

B. State whether the given statements are true (T) or false (F).
1. The applica on of science has improved our life greatly with several benefi ts.
2. Chemists were the people who prac sed alchemy.

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