Explanation

• Mitochondria are called the powerhouse of the cell.
• Because they produce Adenosine Triphosphate (ATP).
• ATP is the energy currency of the cell.
• ATP provides energy for different cellular activities such as movement, growth, and transport.
• Energy is produced through aerobic cellular respiration using oxygen and الغذائی molecules.
• They are found in the cytoplasm of most eukaryotic cells.
• Richard Altmann first described mitochondria in 1890.

Main Parts of a Cell:

1. Cell membrane → Outer protective layer
2. Nucleus → Controls cell activities
3. Cytoplasm → Jelly-like material between membrane and nucleus

Last verified on 09-05-2026

Explanation

• Earth is called the Blue Planet.
• About 71% of Earth's surface is covered by water.
• Water makes Earth appear blue from space.
• Earth is the third planet from the Sun.
• Earth’s natural satellite is the Moon

Last updated: NA on 26-09-2026

Explanation

• The Theory of Relativity was proposed by Albert Einstein.
• It was introduced in the early 20th century.
• It includes Special Relativity (1905) and General Relativity (1915).
• The theory explains the relationship between space, time, and gravity.

Last verified on 02-04-2026

Explanation

• A neutron has no electric charge, so it is electrically neutral.

Additional information:

• A proton has a positive charge (+1).
• An electron has a negative charge (−1).

Last verified on 07-10-2026

Explanation

• The atomic number of hydrogen is 1.
• It is the first element on the periodic table. 
• Named by: Antoine Lavoisier (1783)
• Atomic mass: 1.00784 u
• Appearance: Colorless gas
• Symbol: H
• Protons: 1
• Electrons: 1

Last updated 26-07-2026 by NA

Explanation

• The primary component of natural gas is methane (CH4).
• Making up 70% to 90% or more of its composition.
• It is a colorless, odorless, and highly flammable hydrocarbon gas.
• Characteristics: It is a fossil fuel, often found in rock formations alongside oil or on its own. 

Last updated question 15 March2026

Explanation

• The Earth's outermost layer is called the Crust.
• The crust is the thin, solid outer layer where humans, animals, and plants live.
• It is located above the mantle, outer core, and inner core.
• It is made mainly of rocks and minerals.

Additional information:

• Earth's Layers (Outer to Inner): Crust → Mantle → Outer Core → Inner Core
• Crust Thickness: About 5–70 km
• Mantle Thickness: About 2,900 km
• Outer Core Thickness: About 2,260 km
• Inner Core Radius: About 1,220 km

Last verified on 04-08-2026

Explanation

• Mercury Symbol: Hg
• Atomic number: 80
• Melting point: -38.83 °C
• Atomic mass: 200.59 u

Last verified on 13-03-2026

Explanation

• Mercury is the smallest planet in our solar system.
• Mercury with a diameter of 4,879 km (3031.67 mi).
• Its escape velocity is approximately 4.25 km/s.
• Nearest Planet to Sun.
• Fastest Planet.

Last verified on 23-06-2026

Explanation

• Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.
• Prothrombin is a vitamin K-dependent protein directly involved with blood clotting.

• Vitamin C may protect the body against the effects of pollution.
• It may also prevent blood clots and reduce bruising.

Last verified on 31-03-2026