It involves chemical reactions that cause new substances or products to be formed.

It is a chemical process in which a material chemically combines with oxygen.

It is caused by the chemical reaction between the metal and the moisture in the air.

These are observable changes in the appearance or property of an object without the object changing into a new substance.

Which of the following is NOT an example of Chemical change?

Which of the following is NOT an example of Physical change?

It is a process wherein a solid turns into a liquid.

It is the other term for freezing.

It is a process in which a gas turns into a liquid.

It is a process in which a solid turns directly into gas.

This is the most common source of waste. 

These waste are those that are produced in farms, such as organic waste from cattle and chicken.

These come from factories and manufacturing industries, such as food wastes, used office paper, wood pallets, plastic film, and glass materials.

To reuse is to process waste materials into new useful products.

To repair is to fix or restore broken items that have been used.