Explanation

Meter is the SI unit of length.

It is used to measure distance or height.

Explanation

Gamma radiation is the most dangerous type of radiation.

it has high energy and can penetrate most materials, including human tissue.

It is highly penetrating and can cause significant biological damage.

Explanation

A biconvex lens is the type of lens found in the human eye,

and it is responsible for forming genuine images

The lens, or crystalline lens, is a transparent biconvex

structure in most land vertebrate eyes (We are all vertebrates)

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The image formed at the retina of the human eye is real and inverted.

ND-8-08-2023

Explanation

Polythene is a thermoplastic because it softens when heated and can be reshaped.

It is formed by polymerization of ethene molecules.

Explanation

Amoeba and Paramecium are unicellular, eukaryotic organisms classified under Kingdom Protista.

They live in water and move using structures like pseudopodia (Amoeba) and cilia (Paramecium).

Explanation

• The nucleus of an atom contains protons and neutrons.
• The nucleus is the central part of an atom.
• Protons have a positive charge.
• Neutrons have no electric charge.
• Electrons are found outside the nucleus
• The nucleus makes up much less than. 01% of the volume of the atom,
• But typically contains more than 99.9% of the mass of the atom.

Explanation

• The greenhouse effect is an environmental problem caused by the increasing amount of carbon dioxide (CO2) in the atmosphere.
• Primarily due to human activities such as burning fossil fuels, deforestation, and land-use changes.
• This excess CO2 traps heat and leads to global warming and climate change.

Explanation

Troposphere is the lowest layer of the atmosphere where all weather phenomena occur and where we live.

Exosphere is the outermost layer, gradually merging into space, containing very thin air and satellites.

Explanation

Explanation

The troposphere is the lowest layer of Earth's atmosphere. 

The Layers of atmosphere are: the troposphere, stratosphere, mesosphere and thermosphere.