Explanation

• The Moon’s gravity pulls water toward it → high tide.
• Opposite side also experiences high tide due to inertia.
• Low tides occur between high tides.
• Earth’s rotation helps in the timing of tides.

Last verified on 04-05-2026

Explanation

• Energy consumption refers to how different sectors use power sources like electricity, gas, and fuel.
• Among all sectors, industries require the largest amount of energy for production and manufacturing.
• Industrial activities run machinery, factories, and heavy equipment continuously.

Additional information:

• Transport is usually the second largest energy-consuming sector.

Last verified on 04-05-2026

Explanation

• Solar and wind energy are renewable sources of energy, meaning they are sustainable and will not run out.
• Solar energy is generated from the sun's rays.
• Wind energy is generated from the wind.

Last verified on 09-02-2026

Explanation

• The nucleus is the control center of the cell.
• It regulates all vital activities like growth, reproduction, and metabolism.
• It contains genetic material (DNA).
• Ribosomes make proteins, and cytoplasm supports cell structure.

Last verified on 04-05-2026

Explanation

• Vitamin A deficiency → Night blindness (Nyctalopia)
• Vitamin A is important for vision and immune function.

Additional information:

• Vitamin K is essential for blood clotting.
• Vitamin D helps in calcium absorption and bone mineralization.
• Vitamin B1 supports nerve function and energy metabolism.

Last verified on 01-02-2026

Explanation

• Laser light has unique physical properties.
• It is different from ordinary light.
• It travels in a very narrow and focused beam.
• Its waves move in perfect synchronization.
• These properties are called coherence and directionality.

Last verified on 04-05-2026

Explanation

• Atoms of the same element always have the same atomic number.
• Sometimes, they differ in mass due to neutrons.
• Such atoms have identical chemical behavior.
• They differ only in mass number, not in properties.
• These are called isotopes.

Additional information:

• Radioactive isotopes are used in medicine and industry.
• Carbon-14 is used for age determination (carbon dating).

Last verified on 04-05-2026

Explanation

• Radioactive radiations include alpha, beta, and gamma rays.
• They differ in mass, charge, and penetrating power.
• Alpha rays are the least penetrating among them.
• They can be stopped easily by very thin materials.
• Even a sheet of paper can block alpha radiation completely.

Last verified on 04-05-2026

Explanation

• Atomic number is a fundamental property of an element.
• It defines the identity of an element in the periodic table.
• It is based on particles present in the nucleus.
• Specifically, it depends on the number of protons.
• Each element has a unique atomic number.

Last verified on 04-05-2026

Explanation

• Energy sources are divided into conventional and non-conventional.
• Conventional sources are reliable and used on a large scale.
• They provide continuous energy supply.
• Non-conventional sources depend on natural conditions like sun or wind.
• Natural gas is a conventional and widely used energy source.

Last verified on 04-05-2026