Explanation

• A seismograph is an instrument used to detect and record earthquakes.
• It consists of a mass attached to a fixed base
• During an earthquake, the base moves and the mass does not.

Last verified on 07-09-2026

Explanation

• Seismology is the study of earthquakes and seismic waves that move through and around the Earth.
• A seismologist is a scientist who studies earthquakes and seismic waves.

Last verified on 03-04-2026

Explanation

• O⁻ (O Negative) is the universal donor blood group.
• It can be transfused to A, B, AB, and O blood groups.
• O⁻ blood lacks A, B, and Rh (D) antigens.

Additional information:

• Universal Recipient: AB⁺ (AB Positive)
• ABO Blood Groups: A, B, AB, O
• Rh Types: Positive (+) and Negative (−)
• Total Common Blood Groups: 8 (A⁺, A⁻, B⁺, B⁻, AB⁺, AB⁻, O⁺, O⁻)

Last verified on 14-07-2026

Explanation

• Humidity is the measure of the amount of moisture (water vapour) in the air.
• A hygrometer is used to measure relative humidity.
• A psychrometer is an example of a hygrometer.
• Relative humidity tells us the ratio of water vapour present in the air compared with the maximum amount the air can hold at a given temperature.
• Humidity is commonly expressed as a percentage (%).

Last verified on 23-08-2026

Explanation

• Albuminurophobia is a fear of kidney disease.
• The term is associated with an excessive or irrational fear of developing kidney disease.
• Albuminuria refers to the presence of albumin (a protein) in urine.
• The term is related to concerns about kidney health and disease.

Last verified on 22-08-2026

Explanation

• Ophthalmology is the study and medical specialty concerned with the eyes and vision.
• It deals with the structure, function, diseases, and treatment of the eyes.
• A doctor specializing in this field is called an ophthalmologist.
• Common eye conditions include cataracts, glaucoma, and refractive errors.

Last verified on 08-08-2026

Explanation

Geologists are scientists who study a planet's solid features, like soil, rocks, and minerals.

Explanation

Heterotrophs are those organisms that cannot prepare their food from nature 

Hence depend on other organisms that produce food (autotrophs).

Non-green plants cannot make their food due to the absence of chlorophyll in their leaves

Explanation

The spleen is often referred to as the "graveyard of RBCs"

Because it is responsible for filtering and breaking down old, damaged, and worn-out red blood cells (RBCs).

Explanation

• Geostationary satellites are located directly above the equator. 
• Altitude: About 35,786 kilometers (22,236 miles) above sea level.
• Speed and Direction: Moves from west to east, matching the Earth's rotation speed.
• Time Period: Exactly 24 hours (one rotation day). 

Last updated 26-07-2026 by NA