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Answer:
Examples of permanent changes are:if a tree is grown it can't change back into a baby plant. Temporary change Temporary change is a change is for a limited time. Permanent , Temporary , Chemical & Physical Changes Examples of temporary change are : wet sand can change into dry sand..
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Answer:
Matter can change when exposed to light, heat, air, water and pressure. When a substance is heated, the substance could change completely to another substance. For example, when a piece of wood is burnt, it changes completely to form charcoal or ash. Similarly, when a green plant is exposed to light, some reactions occur in the leaves by the process of photosynthesis in which water and carbon dioxide in the presence of chlorophyll react to form sugar and oxygen. These changes above are changes which cannot be reverted. They are called permanent changes. Other examples of permanent changes include:
Yellowing of plant leaves
Decaying of plant and animal body
Growth in plant and animal body
Iron rust
Burning of substances, etc.
On the other hand, there are changes which occur in some substances, but the original substances can be recovered. These are referred to as temporary changes. Temporary changes are changes that are reversible, that is they can be reverted. Example include:
Water changes into ice.
Water and oil are mixed.
Skin or hair is bleached.
Iron rod is heated in flame.
A substance is dissolved in water