Question

Distinguish between :
1. Natural Environment and Human Environment
2. Sial and Sima.​

Answer 1

Answer:

Environment is the surroundings around a living being. "Natural environment "refers to the environment around an individual consisting of biotic and abiotic components. Trees, rivers etc . "Human made environment" refers to the environment made by humans such as buildings, machines.

Sial is composed of silicon and aluminium.It is upper layer which forms a discontinuous cover over the Earth's crust and is entirely absent the ocean floor. Sima is composed of silicon and magnesium. This is the second layer below sial which forms the ocean base. It is also called oceanic crust.

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