Learning task 4: read the passage below on chemical and physical changes then compare and contrast chemical changes and physical changes by arranging the information using the graphic organizer below identify their differences and similarities do these on your notebook
Answers
Answer:
chemical change:
•permanent change
•changes the properties
physical change:
•Do not change the properties
•temporary change
both:
•affects states of matter
Explanation
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There are two kinds of changes in matter. Both physical and chemical changes occur. Physical change refers to changes in matter that do not affect a substance's chemical composition. Chemical changes are physical changes in matter that cannot be reversed.
Similarities
Physical and chemical changes both influence the state of matter.
Differences for Physical Changes: Do not alter the matter's composition or identity.
It has no effect on the matter's identity.
Physical changes are transient.
Chemical Changes: Convert the matter into a new type of matter with different properties.
Chemical changes are irreversible.
They cannot be reversed.
Following are some examples of Physical Changes:
sculpted clay
A cola can is being smashed.
An ice brick is being melted.
Bringing water to a boil at 100 degrees Celsius
A sand and water mixture
Solutes that dissolve, such as coffee, milk, or sugar.
Document destruction
Taking down trees.
Following are some examples of Chemical Changes:
Iron corrosion
waste decomposition fermentation cooking egg photosynthesis
Acid-reactant mixture
Food digestion
We are surrounded by matter. Change happens every second, whether we notice it or not. The atom is the fundamental building block or component of all matter in the universe.
Three states of matter are:
Solid
They are distinct in terms of shape and volume. This state's atoms and molecules are closely or tightly bound to one another. Brick, stone, chalk, plate, computer, phone, clay, and other solids are examples.
Liquid
Liquids, unlike solids, do not have a distinct shape but do have volume. Liquids conform to the shape of the container into which they are placed. The molecules and atoms are not tightly bound. Oil, water, juice, liquid milk, and dishwashing liquid are all examples of liquids.
Gas
This type of state of matter has no fixed volume or shape. It has mass, but its atoms and molecules are so far apart. Smoke, air, helium, nitrogen, and other gases are examples.
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