250 million years ago super continent Pangaea was surrounded by a single large sea called
Pacific ocean
Atlantic ocean
Panthalassa
Mid-Atlantic Ridge
The formation of mountains are the result of
Divergent boundaries
Convergent boundaries
Transform fault boundaries
Earth quakes
Choose the correct statement
SIAL is in solid state, SIMA is in liquid state.
SIMA is less denser than SIAL
SIMA "floats" on SIAL
The lighter SIAL is considered as "floating" on denser SIMA layer.
The average density of SIAL layer of earth is
7.5 gm/cm3
2.7 gm/cm3
72 gm/cm3
2.7 mgm/cm3
According to plate tectonics great Himalayas formed when
Europe collided with Africa
Asia 'ran' into India
South America collided with Antartica
Laurasia collided with Gondwana land
The main theories that explain the plate movement are
Gravity and Velocity
Velocity and convection
Conduction and Gravity
Gravity and convection
The density of the core is
3.7 gm/cm3 at the centre
5.5 gm/cm3 at the centre
3.0 gm/cm3 at the centre
13.0 gm/cm3 at the centre
The temperature within the Earth increases with depth at rate of
10c for every 23m of depth
30c for every 32m of depth
0.10c for every 32m of depth
10c for every 32m of depth
The copper Mantle is in
Solid state
liquid state
Partially molten state
Molten state
The average thickness of Earth's mantle is about
2840 km
2880 km
2440 km
2480 km
