Explanation

Mercury is the only metal that is liquid at normal temperatures. 

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Chemical compounds of mercury have found uses in batteries, in biocides in the paper industry, in paints, and on seed grain, as antiseptics in pharmaceuticals, as reagents in laboratories, and as catalysts.

Four other elements are liquids slightly warmer than room temperature.

They are:

• francium
• cesium
• gallium
•  rubidium

ND31-12-2022

SH10-8-2023

Explanation

Tissue is composed of similar types of cells that work together to accomplish common tasks, and the study of biological tissue at the tissue level is histology.

Histology means نسیجیات

Explanation

Malaria is caused by a female mosquito, Anopheles; while dengue is caused by Aedes aegypti mosquito.

Explanation

Vitamin A deficiency can be caused by inadequate intake, poor fat absorption, or liver disease.

Deficiency impairs immunity and blood formation, causing skin rashes and typical eye symptoms (xerophthalmia, night blindness, etc.).

Carrot is a good source of Vitamin A.

Night blindness means رات کا اندھا پن 

Explanation

How does the Navstar GPS work for different applications? (5)

The Navstar GPS works by using a constellation of satellites that send signals to GPS receivers on the ground, allowing them to calculate precise location coordinates.

It is used in various applications like navigation, mapping, surveying, military operations, and location tracking for vehicles and personal devices.

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Explanation

The neutron is a neutral particle,

which is stable only in the confines of the nucleus of the atom.

Explanation

Microbiology is the scientific study of microorganisms, those being unicellular, multicellular, or acellular.

Important GK 

Agrostology: Study of Grasses 

Agronomy: soil management and crop production 

Odontology: study of teeth 

Arthrology:Study of joints 

Nephrology: study of kidneys

Hematology: Study of blood  

Dermatology:  Study of skin 

Explanation

A multimeter is mainly used to measure the three basic electrical characteristics of:

voltage,

current,

and resistance. 

A multimeter can be used as an ammeter to measure current, as a voltmeter to measure potential difference

Explanation

Matter is a substance made up of various types of particles that occupy physical space and have inertia

Following are the basic three states of matter:

1. Solid
2. Liquid
3. Gas

ND4-4-20234

Explanation

In Australia, cyclones are called willy-willy.

In the US, it's a hurricane

in the Southern Pacific, a typhoon.

ND17-1-2023