Question

1• What are the two types of Changes in matter? Explain with examples.​

Answer 1

Two types of change in matter:

• Physical change
• Chemical change

Physical change:

• Physical changes are changes in which no bonds are broken or formed.
• This means that the same types of compounds or elements that were there at the beginning of the changes are there at the end of the change.
• Some types of physical changes include:

           Change of state

           Separation of a mixture

            Physical deformation

            Making solutions

• Melting is an example of a physical change.Physical changes can further be classified as reversible and irreversible.
• When salt is dissolved into water, the salt is said to have entered the aqueous state. The salt may be regained by boiling off the water, leaving the salt behind.

Chemical changes:

• Chemical changes occur when bonds are broken and formed between molecules or atoms. Chemical changes are frequently harder to reverse than physical changes.

• Example of a chemical change is burning a candle.

                       Temperature changes

                        Light given off

                        Unexpected color change

                        Bubbles formed

                        Different smell or taste.

• For chemical change will involve the energy changes that occur in chemical changes, that involves the facts that new substances with different properties are formed in a chemical change.

Answer 2

Physical change, in which merely the shape of the matter changes; physical phase shift, in which matter changes to a different form (solid, liquid, or gas); and chemical change, in which matter transforms...

When matter undergoes a physical transformation, its appearance changes, but its chemical identity does not.

• A can is crushed.

• An ice cube is melting.

• Water that's about to boil.

• Sand and water are being combined.

• A glass is broken.

• Sugar and water must be dissolved.

• Paper must be shredded.

• Woodcutting