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[3 Mark Question Answer]

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Question 13 Marks
Write your observation and conclusion for the following:
When few marbles are put in a glass half-filled with water.
Answer
Take some marbles and put them into the water of glass tumbler one by one. After some time you will notice that water level crosses the mark and rises. This is because the marbles occupy space. Again weigh the glass with the marbles. You will find that the second mass is greater than the first one. This proves that marbles have mass.

This proves that the matter has mass and occupies space.
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Question 23 Marks
How will you prove by an experiment that solids occupy space ?
Answer
Experiment to show that solids occupy space :
Take a glass bowl. Place a glass tumbler full of water in it. Now tie a stone with thread and lower into the water. Some water flows out of tumbler into bowl. When we remove stone from tumbler the level of water in tumbler comes down. This shows that solids occupy space.
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Question 33 Marks
Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, water vapour, carbon-dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.
Answer
Solids Liquids Gases
Common salt Milk Oxygen
Wax Mercury Water vapour
Stone Blood Carbon dioxide
Sugar Coconut oil
Coal Kerosene
Butter
Copper
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