Explanation

• Carbohydrates are the fastest and main source of energy.
• They are quickly converted into glucose in the body.
• Glucose is used immediately for energy production.
• They provide instant fuel for brain and muscles.

Last verified on 14-05-2026

Explanation

• A solid is a state of matter that has a fixed shape and a fixed volume.
• Solids maintain their shape and volume unless an external force is applied to change them.

Additional information:

• Liquid: A liquid has a fixed volume but takes the shape of its container.
• Gas: A gas has neither a fixed shape nor a fixed volume.
• It expands to fill its container.

Last verified on 13-11-2026

Explanation

• The instrument used to measure temperature is called a thermometer.
• A thermometer shows how hot or cold an object or place is.

Additional information:

• Barometer measures air pressure.
• Hygrometer measures humidity (moisture in air).

Last verified on 16-06-2026

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Additional information:

• 1 Joule (J) = 1 Newton × 1 meter
• Calorie – 1 cal = 4.184 J
• Kilowatt-hour (kWh) – 1 kWh = 3.6 × 10⁶ J
• Electronvolt (eV) – 1 eV ≈ 1.602 × 10⁻¹⁹ J
• Erg (CGS unit) – 1 erg = 10⁻⁷ J

Last verified on 17-01-2026

Explanation

• Iodine deficiency causes goiter, an enlargement of the thyroid gland.
• Iodine is essential for the production of thyroid hormones.
• Severe iodine deficiency during pregnancy or early childhood can impair brain development.

Last verified on 07-09-2026

Explanation

Iron deficiency can lead to Anaemia, a condition characterized by:

• Low red blood cell count
• Pale skin
• Fatigue
• Shortness of breath
• Dizziness

Last verified on 02-11-2026

Explanation

• The normal body temperature is: 37°C.
• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• Scurvy Cause: Vitamin C (ascorbic acid) deficiency. 
• Symptoms: Fatigue, weak and sore limbs, bleeding gums, easy bruising, delayed wound healing, and anemia. 

Additional information:

• Rickets: Caused by a deficiency in Vitamin D.
• Beriberi: Caused by a deficiency in Vitamin B1 (Thiamine).
• Night Blindness: Caused by a deficiency in Vitamin A.

Last verified on 09-10-2026

Explanation

In the Fahrenheit scale:

• The boiling point of water is 212°F
• The freezing point of water is 32°F

Additional information:

In the Celsius scale:

• Boiling point of water: 100°C
• Freezing point of water: 0°C

Last verified on 02-04-2026

Explanation

Vitamin B Complex deficiency, specifically Vitamin B1 (Thiamine) deficiency, can cause:

Beriberi, a disease characterized by:

• Fatigue and weakness
• Nerve damage and pain
• Heart problems
• Swelling of legs and feet

Additional information:

• Vitamin B3 (Niacin) deficiency → Pellagra
• Vitamin B12 deficiency → Megaloblastic anemia and neurological problems

Last verified on 01-10-2026