Which objects are made of only one material?
S.No
Object
Material
1
Door
Wood, metal, rubber.
2
Towel
3
Bicycle
4
Knife
5
Mirror
6
Shoes
7
Water bottle
8
Pot
Important Questions on Materials - Separating Methods
Which objects are made of more than one material?
| S.No | Object | Material |
| 1 | Door | Wood, metal, rubber. |
| 2 | Towel | |
| 3 | Bicycle | |
| 4 | Knife | |
| 5 | Mirror | |
| 6 | Shoes | |
| 7 | Water bottle | |
| 8 | Pot |
How many types of materials are used for making chairs?
Name as many things/objects as you can, made using the materials given below.
| S.No | Material | Things/objects |
| 1. | Metal | Utensils, ... |
| 2. | Plastic | Bag, ... |
| 3. | Glass | Mirror, ... |
| 4. | Wood | Table, ... |
| 5. | Cotton | Cloth, ... |
| 6. | Leather | Shoes, ... |
| 7. | Ceramic | Cup, ... |
| 8. | Rock | Idols, ... |
| Solids | Liquids | Gases |
| Stone | Milk | Smoke |
Let us assume that a tomato, brinjal, potato, iron nail, sponge, wood, stone, leaf, piece of chalk, and paper are given to you. Predict which of the following objects will sink and which of them will float on water.
| Prediction | Object |
| Sinks | Stone... |
| Floats |
Let us assume that a tomato, brinjal, potato, iron nail, sponge, wood, stone, leaf, piece of chalk, and paper are given to you. Predict which of the following objects will sink and which of them will float on water.
| Prediction | Object |
| Sinks | Stone, potato, iron nail, wood. |
| Floats | Brinjal, sponge, tomato, leaf, paper, piece of chalk. |
Now test whether your predictions are correct or wrong by dropping the above objects in a beaker of water one by one.
| Prediction | Object | Findings |
| Sinks | ||
| Floats |
Take five beakers with water. Take small quantities of sugar, salt, chalk powder, sand and sawdust. Add each material to separate beakers and stir. Observe the changes and record your observations.
| S.No | Materials added | Dissolves(Yes/No) |
| 1. | Sugar | |
| 2. | Salt | |
| 3. | Sand | |
| 4. | Sawdust | |
| 5. | Chalk powder |
