Explanation

• Phosphorus (P), Potassium (K), and Nitrogen (N) are three essential macronutrients for plant growth.
• It is also referred to as "NPK".
• They play critical roles in various plant processes, including photosynthesis, root development, and cell growth.

Last verified on 17-03-2026

Explanation

• A sphygmomanometer is a medical device used to measure blood pressure.
• It consists of an inflatable cuff and a pressure gauge.

Last verified on 17-03-2026

Explanation

• Mercury is the closest planet to the Sun, followed by Venus.
• Called an inner planet because it orbits inside Earth’s orbit.
• Number of moons: 0 (Mercury has no natural satellites).
• Size: Smallest planet in the solar system.
• Nickname: Swift Planet, due to its fast orbit around the Sun (≈88 days per orbit).

Last verified on 17-03-2026

Explanation

• A light year is the distance that light travels in one year.
• It is used to measure vast distances in space.
• Light moves at approximately 299,792 km per second.
• One light year ≈ 9.46 trillion kilometers (5.88 trillion miles).

Last verified on 17-03-2026

Explanation

• Sand is primarily composed of silicon dioxide (SiO₂).
• It is a chemical compound made of silicon and oxygen atoms in a 1:2 ratio.
• SiO₂ is found in quartz, glass, and sand naturally.
• It is hard, chemically stable, and insoluble in water.

Last verified on 16-03-2026

Explanation

• 1 meter = 3.2808 feet exactly.

Additional information:

• 1 kilometer = 3280.8 feet
• 1 centimeter = 0.032808 feet
• 1 inch = 0.083333 feet
• 1 mile = 5280 feet
• 1 yard = 3 feet

Last verified on 16-03-2026

Explanation

• Copper is a chemical element with the symbol Cu and atomic number 29. 
• It is a soft, malleable, and ductile metal with a reddish-orange color.

The some major elements with their symbols:

• Hydrogen - H
• Sodium - Na
• Carbon - C
• Nitrogen - N
• Oxygen - O
• Fluorine - F
• Chlorine - Cl
• Potassium - K
• Helium - He
• Neon - Ne
• Calcium - Ca
• Sulphur - S
• Phosphorus - P
• Aluminium - Al
• Magnesium - Mg
• Iron - Fe

Last verified on 16-03-2026

Explanation

• Translocation is the process by which food made in the leaves moves to other parts of the plant through the phloem.
• In plants, food is produced in the leaves through photosynthesis.
• This prepared food must be transported to other parts like roots, stems, and fruits.

Last verified on 16-03-2026

Explanation

• Battery is a device that converts chemical energy into electrical energy.
• Batteries work by using a galvanic cell.
• It is an electrochemical device made up of two electrodes and an electrolyte solution.

Last verified on 16-03-2026

Explanation