question answers of ch 5 of science book

question answers of ch 5 of science book increase heating? their size and shape to any typeof container in which the can a liquid take the shape of the container in which it is kept What can you learn from liquids? nswef Questions: :ritw arrangement of molecules in solids and liquids. th,.ppens to the particles of water when heated? 'd Answer: your mother cooks food, you can smell the food across the hou ind of change is there in the following activities: physical or rrpening a pencil (b) burning a matcl fling of milk by adding lemon juice (d) cutting potatoe. rity Oject hr•wl Add coconut powder, almonds, cashew nuts milk has changq

Dear student,
1)Physical change is a change in which no new substances are formed which affects its structure but not its composition
eg:-Melting of ice cube.

2)When substance is heated the molecules vibrate faster so the space between the molecules increases and result of increased moleculat motion is that the object expands and takes more space.


3)Properties of solids are:-
They have definitive shape
They have definitive volume
They have high density
They are incompressible

4)Properties of gases are:-
They have indefinite shape
They have indefinite volume
They have low density
They are easily compressible

5)Liquids do not have a definite shape so they take the shape of the container ,we should learn the adapt to every situation from liquids.

6)In solids the molecules and atoms are compactly arranged , in liquids the molecules and atoms are arranged far from eachother .


7)When water is heated the space and distance between the molecules increases leading to conversion of water into Steam.

8)Physical change:cutting of potatoes and sharpening of pencil
   chemical change:burning a match and curdling of milk by adding lemon juice.

Hope this information will clear your doubts about topic.

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