Question

Quiz 1
1. Is a hydrogen molecule made of atoms of the same kind? What about an oxygen molecule and a
water molecule?
2. Is an atom electrically neutral?
3. Which subatomic particle is negatively charged?
4. Name one source of vitamin A.
5. Which minerals are needed for healthy bones?
6. What is a malleable material?
7. Of oil and glycerine, which is miscible with water?
8. Which is the solute and which the solvent in a glucose solution?
9. If you were asked to choose between wood and stone, which would you use to build a house?
Give reasons for your answer.
10. Which machine is used for combing cotton from seeds?
11. Why are flax and jute plants submerged in water?
12. Why do you think raincoats are made of synthetic material?
13. Is rusting a fast chemical change?
14. Are germination, photosynthesis and the ripening of fruit changes of different kinds?
15. A balloon bursts when it is pricked. A firecracker bursts when it is lit. Are these changes of the
same kind?​

Answer 1

Explanation:

bshfakteakgayorayItwogdzlhflhrsutaktqo6ea694q967tp33jfzetZjgs53foTsdkgrsjvkygkysitz5eUquta52au5e86r8