DAV Class 5 Science Solution Chapter 8 Properties of Water
DAV School Books Class 5 Science Solution Chapter 8 Properties of Water all Question Answer. DAV Class 5 8th Chapter Properties of Water full Chapter explanation by expert teacher.
A.) Fill in the blanks.
Answer: (1) soluble (2) solute (3) insoluble (4) oxygen (5) evaporation (6) liquids.
B.) Write True or False for the following statements.
1.) Sugar and salt are soluble in water.
2.) Hair oil is insoluble in water.
3.) Pebbles float on water.
4.) Sand sinks in water.
5) Water vapours can be changed into liquid water by heating.
Answer: (1) True (2) True (3) False, pebbles sink in water (4) True (5) False, they can be changed/condensed into liquid by cooling
C.) Tick the correct option.
1.) In a solution of sugar and water-
Answer: water is the solvent.
2.) When sand is mixed with water, it –
Answer: does not dissolve but sinks in water.
3.) Wet clothes get dried due to-
Answer: evaporation
4.) Mixture of sugar, salt and lemon juice in water is a-
Answer: solution
- Answer the following questions in brief.
1.) Define a solution.
A substance that dissolves in in any medium fully it forms a solution
2.) What is a solvent?
Answer: the substance that is dissolved into the medium to get a solution is known as the solute whereas the medium in which it is dissolved is known as the solvent
3.) Name two substances that are soluble in water.
Answer: Salt and sugar.
4.) Name two substances that are insoluble in water.
Answer: Sand and coin.
5.) Write the names of four substances that float on water.
Answer: Cork, paper, leaves and oil can float on water
6.) Name the three forms of water.
The three forms of water are ice water vapor and water in liquid form
E.) Answers the following questions.
1.) Give two examples each of:
(a) liquids which dissolve in water.
Answer: milk , sugar syrup
(b) liquids which are insoluble in water.
Answer: oil and petrol
(c) solids which float on water.
Answer: cork and paper
(d) solids which sink in water.
Answer: iron and wood
2.) What do we understand by the term’s ‘evaporation’ and ‘condensation’?
Answer: The change of state of a liquid into vapor upon heating is known as evaporation
The change of state of water vapor into liquid upon cooling it is known as condensation.
3.) How are clouds formed?
Answer: Water from water bodies such as seas and oceans vaporize due to the warmth from the sun. these water vapor rise above and reach high altitude upon reaching there it is cold and condensed into small droplets of water. this is how cloud is formed.
4.) How does rain water get impure?
Answer: rain water get impure because while precipitating it is mixed with harmful gasses as well as impurities such as dust and smoke.
5.) Draw a diagram showing the water cycle.