Advertisements
Advertisements
Question
When can you say a material is waterproof material?
Advertisements
Solution
Materials that do not allow water to pass through them are called waterproof materials.
Example: raincoat, aluminium foil of tablet strip.
APPEARS IN
RELATED QUESTIONS
Very Short Answer Type Question:
Suggest two bases on which we can group objects.
Find the odd one.
Umbrella, sponge, rain coat, jerkin
Look at the pictures and identify the materials by which they are made of:
(paper, clay, glass, wood, plastic, metal rubber, wax
 |
|
 |
|
 |
| ____________ | ____________ | ____________ | ___________ | _____________ |
 |
 |
 |
 |
 |
| ____________ | ____________ | ____________ | ____________ | ____________ |
Sugar does not dissolve in water.
Choose the odd one:
Soft materials can be early compressed.
Name some examples for shiny materials?
Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour?
Complete the crossword given in the figure with the help of the clues.
Across
1. Which is generally hard, ductile, malleable and sonorous.
2. A metal is called so it can be drawn into wires.
3. Metal bells are used because of this property.
Down
4. A metal generally used for making jewellery.
5. A metal which is liquid at room temperature.
6. A metal which reacts with acid as well as base to form hydrogen gas.
7. Substances used to enhance the growth of plants.
8. Property by virtue of which metals can be beaten into thin sheets.
Pick one material from the following which is completely soluble in water.
