(A) Write True or False as applicable in the following 5 questions- (a) to (e):

Question

(A) Write True or False as applicable in the following 5 questions- (a) to (e): [5) (a) Oxygen and Iron are the most abundant elements, each accounting for nearly a third of the planet's overall mass. Tree - (b) Iron is concentrated in the Crust and Mantle, whereas oxygen is concentrated in the Core. false (c) Earth's activities are powered by two sources of energy: () Solar energy (heat and light), and (i) Earth's internal heat energy (heat trapped during its origin and radioactivity in its interior). (d) Heat radiating from Earth is equal to the total heat received from the sun and from Earth's interior. (e) Earth's mass has been increasing from birth and continuing talse (B) Which two internal layers of Earth are involved in the Geodynamo system? 12] and

Explanation / Answer

a.True=iron and oxygen are most abundant elements present in earth
   iron=35% of earths mass and oxygen=30%

b.False
iron is also concentrated in core and earth's crust contains oxygen

c.true
the eaeth's main sources of energy are sun and internal heat energy
there are also sources like wind, fossil fuels etc. but the given two are main sources

d.true
but heat coming from the interior is only 0.03% of total energy, so it is sometimes neglected......

e.true
Earths mass is increasing due to fall of dust from the sky and global warming.

B.Inner and outer layers of core anre involved

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