Chapter 4 (2)

MARKING SCHEMES- CHAPTER 4 (THE VARIETY RESOURCES ON EARTH )

QUES 1 a

b c

2

a

b c.

3

a

b c

d

4

e a b

CHARACTERISTICS i. P : compound Q : mixture R : element i. Substance Q : blood Substance R : gold , copper , diamond i. [ accept suitable answer )

ii. i. M : N : O :

MARKS

3

2 3 1

9

[ √ ] compound mixture element

ii. by electrolysis Hard / shiny / malleable / can be polished / good conductor of heat / good conductor of electric i. K : element L : compound ii. Substance K : gold , iron Substance L : water , carbon dioxide P : Sulphur, Q : Iron Oxide, R : Carbon dioxide, S : oxygen

Elements are substances that are made up of only one type of atom P & S = element Q = mixture R = compound i. water ii. blood / soil By sieving , filtration ( accept any suitable answer ) Q : compound P : element R : iron , gold

TOTAL

3

1 2 2 8 4 1 2

2 1 1 2

10

2

c

5 P:

1

Q: b c

To absorb carbon dioxide Living things used oxygen during respiration.

1 1

2