Question

Which of the following theories has no connection with the origin of the earth?
A. Nebular hypothesis of Laplace
B. Tidal hypothesis of Jeans and Jeffrey’s
C. Binary star theory of Lyttleton
D. Convection current theory of Holmes

Answer 1

Hint: As we know, our planet earth is very old in our solar system and from years to years in past human beings try to understand about the origin of earth about how the earth forms and from where it begins and so, several peoples and scientists across the world put their ideas about the origin of earth. We will discuss each option to know which theory doesn't deal with the origin of earth.

Complete answer:
Let us first know about Nebular hypothesis of Laplace, Laplace in $1796$ put his ideas about origin of earth as the material from which solar system exist today was once a slow rotating cloud which consists of many different extremely hot gases, and this theory known as Nebular hypothesis of Laplace.

The Tidal hypothesis of Jeans and Jeffrey’s said that once the sun was approached to an unknown star which pulls the solar surface and then breaks into many smaller stars which are now the planets of our solar system.

Binary star theory of Lyttleton suggests that if the sun were a binary system which consists of two stars then any material produced in the solar system like planets can be a result of breaking of a star due to solar gravity and thus the whole solar system is formed.

Convection current theory of Holmes suggests that convection currents also travel through mantle in the same way as hot air moves inside a room, hence this theory is about convection currents not about the origin of earth.

Hence, the correct option is D.

Note: It should be remembered that, the modern theory which is widely accepted for the formation of not only earth but the whole universe is big bang theory which states that from a singular dense hot point, whole matter and energy exploded and thus formed galaxy planets solar systems. The movement of energy from one place to another in fluids or gas particles is known as convection current.