Explanation

• During the Hijrah in 622 AD (1 AH), Prophet Muhammad ﷺ and Hazrat Abu Bakr (RA) hid in the Cave of Thawr to avoid the Quraysh who were pursuing them.
• They stayed there for three days before continuing their journey to Madinah.

Last verified on 07-03-2026

Explanation

• Army Chief, General Muhammad Zia-ul-Haq imposed Third Martial Law in Pakistan on 05-07-1977.

Additional information:

• First Martial Law: 7th October 1958 by Iskandar Mirza
• 2nd Martial Law: 25th March 1969 by General Yahya Khan
• 4th Martial Law: 12th October 1999 by General Pervaiz Musharraf

Last verified on 07-03-2026

Explanation

• Carnivores are animals that eat only meat, primarily from other animals.
• Examples of carnivores include lions, tigers, bears, wolves, and sharks.

Additional information:

• Animals that eat plants exclusively are herbivores.
• Animals that eat both plants and meat are called omnivores.

Last verified on 07-03-2026

Explanation

• Decomposers are organisms that break down dead and waste products, releasing useful elements such as carbon, nitrogen, and phosphorus back into the soil and environment.
• This process is called decomposition, and it's an essential step in the nutrient cycle.

Decomposers include organisms like:

• Bacteria
• Fungi (such as mushrooms)
• Detritivores (such as earthworms and insects)

By breaking down organic matter, decomposers help to:

• Recycle nutrients
• Improve soil structure and fertility
• Support plant growth and development

Last verified on 07-03-2026

Explanation

• Amphibians are animals that live both in water and on land.
• Most amphibians lay their eggs in water because their eggs do not have a protective shell.
• Examples of Amphibians: Frog, Toad, Salamander, Newt, Caecilian

Last verified on 07-03-2026

Explanation

• A parachute increases air resistance (drag) when it opens in the air.
• This slows down the falling speed of a skydiver, allowing a safe landing.

Forces acting on a skydiver:

• Gravity (pulls downward)
• Air resistance (pushes upward)

Last verified on 07-03-2026

Explanation

• An iron nail/steel rod can be magnetized by passing an electric current around it, a process known as electromagnetic induction.
• This is the principle behind electromagnets.

Last verified on 07-03-2026

Explanation

• Friction is a force that opposes motion between two surfaces in contact.
• It slows down or stops objects when they move against each other.
• Friction helps us walk, write, and hold objects without slipping.
• Too much friction can cause heat and wear in machines.

Last verified on 07-03-2026

Explanation

• An eraser is usually made of rubber, which does not attract magnets.
  • Magnetic materials are substances that are attracted by a magnet.
  • Materials like iron and steel are magnetic, while rubber or plastic items are non-magnetic.

Additional information:

• Common Magnetic Materials:
  • Iron
  • Nickel
  • Cobalt
  • Steel (paper clip, iron nail)
  • Some alloys
  Non-magnetic examples: Rubber, wood, plastic, paper.

Last verified on 07-03-2026

Explanation

• Protons and neutrons form the nucleus of an atom.
• Together, they are called nucleons because they are nuclear particles.

Additional information:

• Nucleons determine the mass of an atom.
• Isotopes are atoms of the same element with different number of neutrons.

Last verified on 07-03-2026