Q4. Answer the following questions in short.
Answers
Answer:
1>Answer: Plastic containers are favoured for storing food because plastic is non-reactive and will not react with the ingredients of the food items. ... Plastic has replaced traditional materials like paperboard, wood, metals.
2>The most common use of coke is as a fuel for stoves, furnaces and blacksmithing. It is sometimes preferred over coal because burning coke produces very little smoke.
It is also used to produce iron in a blast furnace.
Coke is used to manufacture steel and many other materials.
3>(a) Wild animals: Deforestation destroys the habitats of many wild animals. They are left to die without their natural shelter. ... Due to deforestation various wild animals run to nearby villages and cause danger to them. Villagers cannot get fruits, fuel wood due to deforestation.
4>Reproduction is very important for the organisms. The organisms reproduce to produce young ones like them. It helps to carry on their generation. If reproduction does not take place, no living being will survive on the earth.
5>Metamorphosis is a biological process which involves sudden and abrupt changes in the body structure of the animal by cell growth and differentiation. It is generally observed in amphibians and insects. Examples: frogs and butterflies.