1 |
The rock from which minerals can be obtained are called: |
silicons
ores
metals
gem stone
|
2 |
The total number of people living together in an area at a particular time is called |
special
population
community
habitat
|
3 |
How much population of Pakistan depends on agriculture |
90%
80%
60%
50%
|
4 |
The height of troposphere above earth's surface is |
10 km 
18 km
20 km 
40 km 
|
5 |
The main causes of depletion of ozone layer is |
oxygen
hydrogen
chlorofluorocarbon
hydrocarbon
|
6 |
The coldest layer of the atmosphere |
Troposphere 
Stratosphere 
Mesosphere 
Thermosphere 
|
7 |
Where the ozone make a protective layer? |
Troposphere 
Stratosphere 
Mesosphere 
Thermosphere  
|
8 |
The height of stratosphere above earth's is surface is: |
18 km
25 km 
50 km 
100 km 
|
9 |
The temperature in the mesosphere is |
-10°C
-100°C
-60°C
-80°C
|
10 |
The percentage of carbon dioxide in Air is: |
40%
0.4%
0.04%
33%
|
11 |
The percentage of oxygen in Air is |
78%
21%
0.04%
33%
|
12 |
The thickness of Atmosphere is |
100 km
200 km 
300 km 
400 km 
|
13 |
The chemical present in the cigarette smoke is |
Tar 
Carbon monoxide 
Nicotine 
All A,B,C
|
14 |
The important symptom of measles is |
Muscles infection
Koplik's spot
Dehydration
Paralysis
|
15 |
DPT vaccination is not effective for the disease |
Diphtheria 
Polio
Whooping 
Diphtheria 
|