describe two changes that are harmful. Explain why you clnsidered them harmful? How can you prevent them?
Answers
a) pollution
b) killing of animals
the reason considered them harmful is :
a) Pollution- lots of harmful gases release from
pollution. the harmful gases are
not good for breathing, it spoils
our breathing organ.pollution are
from vehicles, factories and etc.
b) killing of animals- killing of animals lead to
endangered of animals.
number of animals may
decrease.
we can prevent by:
a) using pollution free vehicles and going for a walk in less distance
b) saving animals but not killing them.
Answer:
The two chemical changes which are harmful to us are given below: Rusting of iron, Spoilage of food.
Explanation:
Rusting of iron:- It can cause ship harm and galvanizing can prevent it.
When a piece of iron has been open for a while it acquires a brownish material film.
This substance is called rust and is called the rusting process. Rusting is dangerous since iron artifacts are broken.
Iron is the most commonly used material and so it is such a severe issue to rust.
Spoilage of food:- When a food item is carelessly kept, get spoiled.
It is a chemical adjustment for us, and clearly dangerous.
Microorganisms do not sustain when the humidity is elevated or low. As such food products contained in the fridge will not ruin. We should also hold them sealed so microbes don't have the opportunity to get in and damage everything.