Explanation

Diamond is an allotrope of carbon.

Hence, it is made up of carbon.

Diamond is a very expensive ornament.

It is composed of a single element carbon.

Explanation

Venus is known as Earth's sister planet because both planets are a lot similar to each other.

Mars is called the brother of the Earth.

Explanation

Gases can dissolve in water.

The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules.

Oxygen, Carbon dioxide, and Nitrogen are mostly soluble gases in water.

Explanation

Potassium is the chemical element.

Symbol: K 

Atomic number: 19

Electron configuration: 4s1

Electrons per shell: 2, 8, 8, 1

Explanation

White blood cells are called soldiers of the body, because the white blood cells provide immunity to our body.

They help in fighting against diseases, infections, allergies and foreign particles.

Explanation

How is the Rainbow formed? 5 marks

Rainbow:

"A rainbow is a meteorological and optical phenomenon that is caused by the reflection, refraction, and dispersion of light in water droplets"

Color of Rianbow:

The colors of the rainbow are:

1. Red
2. orange
3. yellow
4. green
5. blue
6. indigo
7. and violet.

Rainbow formed:

• When sunlight hits a rain droplet, some of the light is reflected.
  
• The electromagnetic spectrum is made of light with many different wavelengths, and each is reflected at a different angle.
• Thus, the spectrum is separated, producing a rainbow.

Explanation

Explanation

• Replication is the process by which a cell makes an exact copy of its DNA before cell division, ensuring that the new cell receives a complete set of genetic instructions.
• This process is crucial for the transmission of genetic information from one generation of cells to the next.

Explanation

• A cataract is a clouding of the lens in the eye that affects vision.
• It is a common age-related condition that can cause blurry vision, double vision, and sensitivity to light.
• Cataracts can be treated with surgery to remove the cloudy lens and replace it with an artificial lens.

Explanation

Gas molecules move in random directions with high speed and energy.

This random motion leads to collisions with each other and the container walls.