Definition of Metals
Metals are substances that are usually hard, shiny, strong, and good conductors of heat and electricity.
Main Details
Metals are found in the Earth’s crust.
They are mostly solid at room temperature (except mercury).
They can be:
🌱 Definition
A plant cell is the basic unit of life in plants. It is a tiny structure that makes up all parts of a plant and helps it grow, make food, and stay alive.
🌿 Main Details
Plant cells have a cell wall that gives them a strong and fixed shape.
They contain chloroplasts, which help in photosynthesis (making food using sunlight).
Definition
Microorganisms are tiny living organisms that can only be seen with a microscope.
Main Details
They are found everywhere (air, water, soil)
Some are helpful and some are harmful
Definition
The immune system is the body’s defense system that protects us from harmful germs like bacteria and viruses.
Main Details
It includes organs, cells, and proteins that work together
White blood cells fight infections
It can recognize harmful substances
