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Now answer these questions for quick revision.
(Short Answer Questions)
Write two examples showing change in position.
Write two examples showing change in shape and size,
3. Write two examples showing change in state,
4. What is a physical change?
5. Is a new substance formed in physical change?
6. How is cloud formation a physical change?
7. How is magnetization is a physical change?
8. Write two examples of physical change from your daily life.
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Answers
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here is the answer....
1.We push a bicycle to move it, we pull the table to change its position.
2. when we stretch the rubber band, its shape is changed.
3.Phase changes include vaporization, condensation, melting, freezing, sublimation, and deposition. ... Condensation occurs when the particles in a gas cool enough (lose energy) to change to the liquid state. An example of condensation is when a glass of ice water forms water droplets on the outside.
4.Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
5.Changes can be of two types, physical and chemical. Physical changes are changes in the physical properties of substances. No new substances are formed in these changes.
6.Formation of clouds is a physical change because when water evaporates in the process of evaporation it goes into air and form clouds by the process of condensation . This water goes back to earth by precipitation. This process is repeated again and again
7.Magnetization of iron is a physical change and not a chemical change as there is no change of state, no change of temperature, no smell and no evolution of gas. ... - After demagnetizing the iron it will lose its magnetic power.
8.Examples of Physical Changes
Crushing a can.
Melting an ice cube.
Boiling water.
Mixing sand and water.
Breaking a glass.
Dissolving sugar and water.
Shredding paper.
Chopping wood.
please mark brainliest....
Answer:
Ans1:- Pendulum of clock, Moon
Ans2:- Water, Clay
Ans3:- Condensation, Evaporation
Ans4:- A physical change is a change in which the physical properties of a substance can be changed. Physical changes can be shown from outside.
Ans5:- No, negligible substances can be formed in physical change.
Ans6:- Because when water evaporates it goes into air and form clouds by the process of condensation. This water goes back to earth by precipitaion. So, there are no new substance formed. Hence, it proves that cloud formation is a physical change.
Ans7:- It is a physical change as there is no change of state, no change of temperature, no smell. Hence, no chemical process is involved.
Ans8:- Folding of paper, Rolling of dough