Explanation

Thermochemistry is the study of chemical reactions and the energy changes that involve heat.

***

RY24012023

Explanation

The burning of substances in air or oxygen on heating, with the release of a large amount of heat energy and light energy, is called combustion

while

In conduction, heat transfer occurs between objects by direct contact.

In convection, the heat transfer takes within the fluid

Condensation is the process by which water vapor in the air is changed into liquid water; it's the opposite of evaporation

**

ND22-1-2023

***

RY24012023

Explanation

Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens.

The concave lens are known as diverging lenses, as the rays diverge after falling on the concave lens.

***

RY24012023

Explanation

Retina: The retina is the light-sensitive tissue at the back of the eye.

The retina converts light into electrical impulses that are sent to the brain through the optic nerve.

Vitreous gel: The vitreous gel is a transparent, colorless mass that fills the rear two-thirds of the eyeball, between the lens and the retina.

***

RY24012023

Explanation

When light shines on a photovoltaic (PV) cell – also called a solar cell – that light may be reflected, absorbed, or pass right through the cell.

The PV cell is composed of semiconductor material; the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal.

***

RY24012023

Explanation

When Galileo pointed his telescope at Jupiter, the largest planet in our solar system, he made a startling discovery.

The planet had four "stars" surrounding it.

***

RY24012023

Explanation

When water cools from 4°C to 0°C, ice crystals begin to form 

When water freezes, the water molecules form a lattice that increases the volume.

As a result, the density decreases

**

ND22-1-2023

Explanation

Telescope: It is a device used to see distant objects.

The word telescope was coined in 1611 by the Greek mathematician Giovanni Demisiani 

**

ND22-1-2023

Explanation

The breakdown of CFCs releases chlorine, which then acts as a catalyst for the destruction of the ozone layer.

**

ND22-1-2023

Explanation

The form of cell division known as mitosis is responsible for the body's expansion and repair.

while

Gametes are created as a result of the cell division process known as meiosis.

**

ND22-1-2023