Question

Fill in the blanks:

1. Materials that have lustre are usually called as ____________________.

2. Three examples of metals are ____________,_____________& ________________.

3. The gas which can dissolve in water is _________________.

4. Materials are grouped together on the basis of _____ and _________ in their properties.

5. Some metals lose their shine and often look dull because of the action of ______ and

______________ on them.

6. Based upon transparency, materials can be grouped as ______, _____ and ____________.

7. A substance which is used in making different objects is called _________________

8. The materials which occur in nature are called ________________________ materials.

9. . The materials made by man are called _________________________________materials.

10. The materials which have natural shine on their surface are called ____________

11. The substances which dissolves in water are called _______________substances and which

do not dissolve in water are called __________________substances.

12. ______________________________is called the universal solvent.

13. The liquids which dissolve in water are called __________________liquids and which do

not dissolve in water are called ___________________liquids.​

Answer 1

Answer:

1)metals

2)copper, lead, tin, nickel, and zinc

3)Oxygen

4)similarities and differences

5)of air and moisture on them

6)Transparent , Translucent  ,Opaque

7)material

8)natural materials

9)man-,made materials

10)lustrous materials.

Answer 2

Answer:

1.lustrous material

2.copper, iron, silver

3.carbon dioxide

4.similarities and differences

5.air and moisture

6.opaque, transparent and translucent

7.material

8.natural materials

9.man-made materials

10.lustrous material

11.soluble and insoluble

12.Water

13.soluble and insoluble

Explanation:

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