The Sun emits energy in the form of electromagnetic radiation. The following help in the generation of solar energy. Arrange them in the right sequence beginning from the starting of the cycle.
$1$. Hydrogen is converted to helium at very high temperatures and pressures.
$2$. The energy finds its way to Sun's surface.
$3$. A vast quantity of energy is generated by nuclear fusion.

Which of the following statements relating to tsunami is/are correct?

As the tsunamis leave the deep water of the open sea and travel towards shallow water,
$1$. The speed is reduced considerably.
$2$. They attain enormous heights.
$3$. Run-ups from the same tsunami can be variable because of the influence of the geomorphology (shape) of the coastline.

Select the correct answer using the codes given below.

Statement $\mathrm{I}$ The process of decay and disintegration of rocks in situ is called weathering.
Statement $\mathrm{II}$ Weathering takes place both mechanically and chemically.

Which of the following statement(s) is/are correct?

Statement $\mathrm{I}$ Doldrums is a calm belt between $5°\mathrm{N}$ and $5°\mathrm{S}$ of the equator.

Statement $\mathrm{II}$ The Sun rays strike almost vertically over the equator throughout the year.

Which of the following statement(s) is/are correct?

Which of the following statements about tornadoes are correct?

Tornadoes usually spin:
$1$. Anti-clockwise in the Northern hemisphere.
$2$. Clockwise in the Southern hemisphere.
$3$. Clockwise in the Northern hemisphere.
$4$. Anti-clockwise in the Southern hemisphere.

Select the correct answer using the codes given below.

Which of the following statement(s) is/are correct?
$1$. Air close to the Earth's surface is heavier.
$2$. Air close to the Earth's surface contains a larger quantity of water vapour and dust particles.

Select the correct answer using the codes given below.