1.write 4 points to show that changes takes place around us
2.what are the effects of changes
give two example to show change in position
4.name the different types of changes that takes place. give two examples of each type of change
5.what is periodic and non periodic changes give an example
6.give two examples of change which can be both desirable and undesirable
7.give 4 differences between physical and chemical change
8.explain 3 example of effect of heat which changes the size of an object
9.give two examples where object become soft on heating
10.give two examples where object become hard on heating
11.explain with an activity that metal expands on heating
12.why is mercury used in liquid thermometer
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2.what are the effects of changes
give two example to show change in position
4.name the different types of changes that takes place. give two examples of each type of change
5.what is periodic and non periodic changes give an example
6.give two examples of change which can be both desirable and undesirable
7.give 4 differences between physical and chemical change
8.explain 3 example of effect of heat which changes the size of an object
9.give two examples where object become soft on heating
10.give two examples where object become hard on heating
11.explain with an activity that metal expands on heating
12.why is mercury used in liquid thermometer
correct answer = brainliest 5 stars ratings and a thanks
wrong answer = answer will be deleted 1 star rating
Answers & Comments
Verified answer
Answer:
1. For example, sudden change in weather, flowering of plants, melting of ice, ripening of fruits, drying of clothes, milk changing into curd, germination of seeds, cooking of food, rusting of iron, bursting of firecrackers etc., are the common changes that occur in day-to-day life.
2.Below are the examples of situations in which applied force causes a change in the shape of an object.
When we press the foam, its shape is changed.
When we stretch the rubber bend,then its shape is changed.
Making of bread from dough.
3.Reversible change - eg. Melting of ice.
Irreversible change - eg. Burning of paper.
Periodic change - eg. Swinging of pendulum.
Non-periodic change - eg. Occurrence of floods.
Desirable change - eg. Ripening of fruits.
Undesirable change - eg.Rusting of iron.
Natural change - eg. ...
Man-made change - eg.
4.Periodic changes are the changes that repeat themselves after a fixed interval of time. Example - Change of season, day and night cycle, heart beat. Non-periodic changes are the changes that do not repeat themselves after a fixed interval of time. Example - Tornado, volcanic eruption, tsunami, etc. .
5.yes for example If you want to curd the milk then it will a desirable change, and if want to make a tea but the milk is curd at that time you can not able to make a tea, hence, in this case, this will be an undesirable change.
6.chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
7.It becomes hot i.e., there is rise in temperature. It expands in size. It changes in state such as water boils to form water vapour.
8.All the gases around us can not change its state on heating. Such as oxygen, nitrogen, hydrogen, fluorine, chlorine, helium, neon, argon, krypton, radon and all nuclear gases. The chemical substances which dont change their state of matter are diamond and graphite and few more carbon matter.
9 .Hi, The two substance on heating become hard are given below: When vulcanised rubber is heated it gets solidifies and its chemical composition remain same. Egg is made up of proteins ,so when an egg is boiled at high temperature,entropy of it's molecule increases .
10.The two substance on heating become hard are given below: When vulcanised rubber is heated it gets solidifies and its chemical composition remain same. Egg is made up of proteins ,so when an egg is boiled at high temperature,entropy of it's molecule increases .
11.Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.
Answer:
Headaches. Trouble sleeping or insomnia. Digestive problems and stomachaches
appearing or occurring at intervals.
"the periodic visits she made to her father"
relating to the periodic table of the elements.
not recurring at regular intervals
Explanation:
Stress caused by change may have many physical and mental symptoms that can hurt your overall well-being if you aren't able to manage them in a positive way, such as: Headaches. Trouble sleeping or insomnia. Digestive problems and stomachaches.
Different types of changes are as follows-
1. Reversible change - eg. Melting of ice.
2. Irreversible change - eg. Burning of paper.
3. Periodic change - eg. Swinging of pendulum.
4. Non-periodic change - eg. Occurrence of floods.
5. Desirable change - eg. Ripening of fruits.
6. Undesirable change - eg.Rusting of iron.
7. Natural change - eg. Changing of seasons.
8. Man-made change - eg. Changing the direction of flow of a river by dams.
9. Slow change - eg. Growth of a plant.
10. Fast change - eg. Occurrence of lightning during thunderstorm.
11. Physical change - eg. Transformation of ice.
12. Chemical change - eg. Curdling of milk.
Definitions of nonperiodic. adjective. not recurring at regular intervals. synonyms: aperiodic noncyclic. not having repeated cycles.
Changes which take place in a definite interval of time are called periodic changes whereas changes which are irregular and not determined with definite time are called non periodic changes.
Day and night, changing phases of the moon, beating of heart, clock striking an hour are all examples of periodic motion whereas water becoming ice, burning of matchstick etc are non periodic changes.