Explanation

• Cat and Dog is/are a secondary consumer.
• Because they eats primary consumers (herbivores).
• Like mice, birds, and rabbits.

Last verified on 19-03-2026

Explanation

• A permanent magnet retains its magnetism for a long time.
• It is hard to magnetize but difficult to demagnetize once magnetized.
• Made from hard magnetic materials like steel or alnico.
• Unlike temporary magnets, it does not lose its magnetism easily.

Last verified on 17-03-2026

Explanation

• Lung cancer is a disorder of the respiratory tract caused by uncontrolled cell division.
• It leads to the formation of abnormal masses or tumors in the lungs.
• Major types include Small Cell Lung Cancer (SCLC) and Non-Small Cell Lung Cancer (NSCLC).
• Risk factors: Smoking, air pollution, genetic predisposition.
• Symptoms may include cough, chest pain, shortness of breath, and coughing blood.

Last verified on 17-03-2026

Explanation

• The Canines are pointed teeth that are adapted for tearing and slashing.
• Teeth are specialized structures in the mouth for biting, tearing, and chewing food.
• Humans have different types of teeth: incisors, canines, premolars, and molars.
• Humans have 4 canines (2 upper, 2 lower) used for tearing meat.

Last verified on 16-03-2026

Explanation

• A solar day is the time taken by the Earth to complete one full rotation on its axis relative to the Sun.
• Length of a solar day = 24 hours = 1,440 minutes
• Length of a sidereal day = 23 hours 56 minutes 4 seconds
• Earth rotates approximately 360° relative to the Sun in a solar day
• Lunar day = ~24 hours 50 minutes (Moon’s rotation relative to Sun)

Last verified on 15-03-2026

Explanation

• The word ‘Scientia’ is derived from the Latin word Scientia which means ‘knowledge’.
• Science involves observation, experimentation, and analysis.
• The scientific method includes Hypothesis → Experiment → Observation → Conclusion.

Last verified on 13-03-2026

Explanation

• Humans have 20 primary teeth (also known as deciduous or baby teeth).
• 32 permanent teeth (also known as adult teeth).

Explanation

• Enamel is the hard, mineralized outer layer of teeth.
• It protects the inner parts of the tooth from damage and decay.
• Enamel is the hardest substance in the human body.
• It is mainly made of calcium phosphate.
  

Additional information:

• Incisors (8) – used for cutting food
• Canines (4) – used for tearing food
• Premolars (8) – help crush and grind food
• Molars (12) – grind food during chewing
• Total adult teeth = 32

Last verified on 13-03-2026

Explanation

• A thermal conductor is a material that allows heat to pass through it easily.
• Metals like copper, aluminum, and iron are good thermal conductors.
• Thermal conduction occurs mainly in solids where particles are closely packed.
• In contrast, thermal insulators (like wood, plastic, and rubber) resist heat flow.

Last verified on 13-03-2026

Explanation

• Iodine deficiency can cause mental retardation in children.
• Particularly if the deficiency occurs during fetal development or early childhood.
• This is because iodine is essential for brain development and thyroid function.

Last verified on 08-03-2026