Explanation

Seismic waves are waves of energy that travel through Earth's layers

 result of  volcanic eruptions.

 large landslides and large man-made explosions that give out low-frequency acoustic energy.

Explanation

The position of the Earth when it is at the greatest distance from the sun is called the Aphelion.

The closest point to the Sun in a planet's orbit is called perihelion.

Explanation

Tetrafluoroethane (HFC-134a) is commonly used in modern refrigerators.

Unlike Freon, it does not deplete the ozone layer.

Explanation

• Rod cells are responsible for vision in low light conditions, such as at night or in dimly lit environments.
• They are more sensitive than cone cells and can detect even a single photon of light.

Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

Explanation

Malaria is caused by Plasmodium parasites.

The parasites are spread to people through the bites of infected female Anopheles mosquitoes, called "malaria vectors.

Explanation

Explanation

The comparative rates at which solutes move in paper chromatography depend on Rf values. 

Rf values (retention factors) represent the ratio of the distance traveled by a solute to the distance traveled by the solvent front on the paper.

Since different solutes have different polarities and affinities for the mobile and stationary phases, they will travel at different speeds, resulting in unique Rf values.

Therefore, the comparative movement of solutes is directly related to their Rf values. 

Explanation

Sublimation is the process in which water vapour directly condenses into solid form.

Condensation is the process of transformation of water vapour into water.

Evaporation is process by which water or a liquid is transformed from liquid to gaseous state.

Precipitation is the condensation of water vapor in air in form of water droplets or ice.

Explanation

The stratosphere is a layer of Earth's atmosphere.

Stratosphere is the second layer of the atmosphere as you go upward.