a. What is the importance of the three layers of earth?
b. Make a labelled diagram of the inner structure of earth.
c. What is the importance of oxygen for living beings?
d. Experimentally explain the presence of CO, in air.
e. Write the names of the members of the solar system according to their distance
from the Sun.
f. Give the importance of artificial satellites.
g. What are the basic requirements for sustaining life on earth?
h. Why is the Earth called a unique planet?
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a. We have the inner core, outer core, mantle and crust which play an important role on Earth. The layers of the Earth are responsible for the formation of our continents.
b. The interior structure of the Earth is layered in spherical shells: an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core.
c. Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.
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