Q1:
Ans: Occupying space and having mass
Q2:
Ans: Air, water; feelings of love, TV signals
Q3:
Ans: a. Atom
b. Molecule
Q4:
Ans: Similar properties
Q5:
Ans: Yes
Q1:
Ans: Sugar, milk, oxygen
Q2:
Ans: Float
Q3:
Ans: Transparent
Q4:
Ans: As their arrangement of molecules is different from one another
Part- A
Q1:
Ans: a
Q2:
Ans: c
Q3:
Ans: d
Q4:
Ans: b
Q5:
Ans: c
Q6:
Ans: d
Q7:
Ans: b
Q8:
Ans: c
Part - B
Q1:
Ans: wood
Q2:
Ans: volume
Q3:
Ans: atom
Q4:
Ans: molecule
Q5:
Ans: feelings
Q6:
Ans: classification
Q7:
Ans: false
Q8:
Ans: shine
Q9:
Ans: gases
Q10:
Ans: no
Q11:
Ans: oxygen
Q12:
Ans: density, density
Q13:
Ans: translucent
Part - C
Q1:
Ans: Five materials are:
(i) Steel - utensils
(ii) Plastic - bottles
(iii) Wood - furniture
(iv) Cotton - clothes
(v) Leather - shoes
Q2:
Ans: Anything that occupies space and has mass is called matter. For example, water, air, and so on. The two things which are not matter are feelings of love or sadness.
Q3:
Ans: All matter occupies space and has mass.
Q4:
Ans: The smallest particle of an element is an atom, whereas the smallest particle of a compound is a molecule.
Q5:
Ans: The feeling of a surface or substance, i.e., the smoothness, roughness, softness, and so on, is known as texture.
Q6:
Ans: Because some metals lose their luster when exposed to air and moisture.
Q7:
Ans: Paper can be made translucent with a coating of oil.
1. What are the different ways of sorting materials into groups? |
2. Why is it important to sort materials into groups? |
3. How can sorting materials into groups help in everyday life? |
4. Can materials be sorted into more than one group? |
5. How does sorting materials into groups help in scientific research? |
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