Explanation

In the normal human eye, the image is formed On the retina, where light is focused and converted into electrical signals by photoreceptors.

This allows us to perceive and interpret visual information.

Explanation

• Light travels in a straight line.
• It is also known as a rectilinear path.
• It in a homogeneous medium like air or vacuum.

Explanation

• An aqueous solution is one where water acts as the solvent, dissolving the solute.
• This type of solution is common in many chemical reactions and biological processes.

Explanation

Explanation

Vitamins B and C are water-soluble vitamins, meaning they dissolve easily in water.

• Vitamin B: Includes several B vitamins (B1, B2, B3, etc.), all of which are water-soluble.
• Vitamin C (Ascorbic acid): Also highly soluble in water.

Explanation

Solar and wind energy are renewable sources of energy, meaning they are sustainable and will not run out.

Solar energy is generated from the sun's rays.

Wind energy is generated from the wind.

Explanation

The mass of the proton is almost 1836 times heavier than that of an electron.

while

A neutron is 1842 times heavier than an electron.

Explanation

Methane is the simplest of saturated hydrocarbons with a chemical formula CH4.

It consists of four hydrogen atoms and one carbon atom.

It is the simplest alkane.

Explanation

Primary consumers are animals that eat producers (plants) and are the first level of consumers in a food chain. They are also known as herbivores. Examples of primary consumers include:

• Insects (bees, butterflies, ants)
• Small mammals (cows, goats, rabbits, mice, squirrels)
• Birds (finches, sparrows, robins)
• Fish (some species of fish that eat algae or aquatic plants)

Explanation

Light travels at about 300,000 kilometers per second in a vacuum with a refractive index of 1.0,

but slows down to 225,000 kilometers per second in water

and 200,000 kilometers per second in the glass.

ND16-3-2023