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Changes in Matter
Identify whether a given situation is a physical or chemical change.
Write PC for physical change and CC for chemical change.
1. A piece of paper is torn in half. 
2. A banana turns brown after being left out for a few days.
3. Ice cubes are left out on a warm day and melt into liquid.
4. A nail rusts after being exposed to air and moisture.
5. A piece of bread is toasted in a toaster and turns brown.
6. A glass of water is heated and starts to boil.
7. Mixing vinegar and baking soda, causing a fizzy reaction.
8. Carving a piece of wood into a bird sculpture.
Label whether a given illustration is a physical or chemical change.
Write PC for physical change and CC for chemical change.
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FAQs on Visual Worksheet: Changes in Matter - Science Class 5

1. What are the different types of changes in matter?
Ans. There are mainly two types of changes in matter: physical changes and chemical changes. Physical changes involve a change in the physical properties of a substance, such as shape, size, or state, without altering its chemical composition. Examples include melting, freezing, and dissolving. Chemical changes, on the other hand, result in the formation of new substances and involve a change in chemical composition, such as rusting, burning, or digestion.
2. How can we identify a physical change?
Ans. A physical change can be identified by observing changes in the physical properties of a substance without any alteration in its chemical structure. Indicators of a physical change include changes in state (like ice melting into water), changes in shape or size (like cutting a piece of paper), and dissolving substances (like sugar in water). No new substances are formed in physical changes.
3. What are some examples of chemical changes?
Ans. Some common examples of chemical changes include combustion (burning wood), rusting of iron, cooking an egg, and fermentation of sugar to produce alcohol. In these processes, the original substances undergo a transformation into new substances with different properties.
4. What is the difference between reversible and irreversible changes?
Ans. Reversible changes are those that can be reversed to obtain the original substance, such as melting ice or boiling water. Irreversible changes, however, cannot be easily reversed, and the original substance cannot be obtained back, like baking a cake or burning paper.
5. Why is it important to study changes in matter?
Ans. Studying changes in matter is important because it helps us understand how substances interact and transform in various processes. This knowledge is crucial in fields like chemistry, environmental science, and material science, enabling us to develop new materials, improve industrial processes, and address environmental issues effectively.
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