Sorting Materials into Groups
Question 1.
List five things which can be made from wood.
Answer:
- Table
- Chair
- Bed
- Stool
- Almirah
Question 2.
Select those objects from the following which shine :
Glass bowl
Plastic toy
Steel spoon
Cotton shirt
Answer:
- Glass bowl
- Plastic toy
- Steel spoon
Question 3.
Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects.
| Objects | Materials |
| (i) Book | Glass |
| (ii) Tumbler | Wood |
| (iii) Chair | Paper |
| (iv) Toy | Leather |
| (v) Shoes | Plastics |
Answer:
| Objects | Materials |
| (i) Book | Paper |
| (ii) Tumbler | Glass, plastics |
| (iii) Chair | Wood, plastics |
| (iv) Toy | Wood, plastics |
| (v) Shoes | Leather |
Question 4.
State whether the statements given below are True of False ?
(1) Stone is transparent, while glass is opaque.
Answer:
False
(2) A notebook has lustre while eraser does not.
Answer:
False
(3) Chalk dissolves in water.
Answer:
False
(4) A piece of wood floats on water.
Answer:
True
(5) Sugar does not dissolve in water.
Answer:
False
(6) Oil mixes with water.
Answer:
False
(7) Sand settles down in water.
Answer:
True
(8) Vinegar dissolves in water.
Answer:
True
Question 5.
Given below are the names of some objects and materials : Water, basket ball, orange, sugar, globe, apple and earthen pitcher. Group them as:
(a) Round shaped and other shapes
(b) Eatables and non-eatables
Answer:
(a) Round shaped :
- Basket ball
- Orange
- Globe
- Apple
- Earthen pitcher
Other Shapes :
- Water
- Sugar
(b) Eatables :
- Water
- Orange
- Sugar
- Apple
Non-eatables :
- Basket ball
- Globe
- Earthen pitcher
Question 6.
List all items known to you that float on water.
Answer:
- Oil
- Paper
- Wood
- Plastic mug
- Plastic plate
- Leaves
- Ice
- Wax
Question 7
Find the odd one out from the following :
(a)
1. Chair
2. Bed
3. Table
4. Baby
5. Cupboard
Answer:
4. Baby
(b)
1. Rose
2. Jasmine
3. Boat
4. Marigold
5. Lotus
Answer:
3. Boat
(c) Aluminium
1. Iron
2. Copper
3. Silver
4. Sand
Answer:
4. Sand
(d)
1. Sugar
2. Salt
3. Sand
4. Milk
5. Milk Powder
Answer:
3. Sand
InText Questions and Answers
Activity 1
Take four glass tumblers or test tubes. Fill them upto half with water. Take about one teaspoon of vinegar, lemon juice, mustard oil or coconut oil. Add a teaspoon full of vinegar to the first test tube and shake it well. Let it stand for five minutes. Repeat the same with other substances. Observe what happens. Write your observations in table 4.4.
| Liquid | Mixes well/Does not Mix |
| Vinegar | |
| Lemon juice | |
| Mustard oil | |
| Coconut oil | |
| Glycerine |
Answer:
| Liquid | Mixes well/Does not Mix |
| Vinegar | Mixes well |
| Lemon juice | Mixes well |
| Mustard oil | Does not mix |
| Coconut oil | Does not mix |
| Glycerine | Does not mix |
Activity 2
Question 1.
Take a sheet of paper and look through it towards a lighted bulb. Can you see the bulb ?
Answer:
No.
Question 2.
Now, spread 2-3 drops of an oil on the sheet of paper. Look again towards the lighted bulb through that portion of the paper on which the oil has been put. What do you observe ?
Answer:
We can see the bulb through the oiled portion of the paper but not very clearly.