Describe physical and chemical changes that are harmful to us andhow can we prevent by them?

Answer 1

the physical and chemical changesthat are harmful to us are burning of anything in this anew substance may be formed or may not be and it will be harmful because burning is very dangerous the physical and chemical changesthat are harmful to us are burning of anything in this anew substance may be formed or may not be and it will be harmful because burning is very dangerous

Answer 2

Physical changes such as exposure to ionizing radiation or extreme temperatures can be harmful to us by damaging our cells and tissues. To prevent these effects, we can limit our exposure to sources of radiation, wear protective clothing, and avoid extreme temperature environments.

Chemical changes such as exposure to toxic substances or pollutants can be harmful to us by causing poisoning, respiratory issues, or allergic reactions. To prevent these effects, we can avoid contact with harmful chemicals, use protective equipment when handling toxic substances, and ensure proper ventilation in work or living spaces.