Matter in our Surroundings — Practice Quiz
Gujarat Board · Class 9 · Science
Try a 4-question quiz on Matter in our Surroundings for Gujarat Board Class 9 Science: tap an answer to check it and see why.
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Quick Quiz: Matter in our Surroundings
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Which of the following best describes matter?
What happens to the particles of matter when sugar dissolves in water?
The force of attraction between particles is maximum in:
The process of change from solid directly to gas is called:
Sample Questions
Which of the following demonstrate that particles of matter are in continuous motion?
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Smell of incense stick spreading in a room, Ink drop spreading in water, Diffusion of potassium permanganate in water, Steam rising from hot water
All these examples show diffusion - the mixing of particles on their own. This happens because particles are continuously moving. The book lying on a table does not demonstrate particle motion as it appears stationary at the macro level.
Which properties are characteristic of liquids?
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Fixed volume, Can flow, Take shape of container
Liquids have a fixed volume but no fixed shape. They take the shape of their container and can flow. Unlike gases, liquids are not highly compressible, and unlike solids, they don't have a fixed shape.
At which temperature does pure water boil at normal atmospheric pressure?
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100°C
Pure water boils at 100°C (or 373 K) at normal atmospheric pressure. This is the temperature at which liquid water changes to water vapor (steam).
Which factors affect the rate of evaporation?
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Surface area, Temperature, Wind speed, Humidity
Evaporation rate increases with larger surface area, higher temperature, higher wind speed, and lower humidity. The color of the container does not directly affect evaporation rate.
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