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Matter In Our Surroundings
Define the terms rest and motion. Give one example for each.
Rest: If a body does not change its position with respect to its surroundings, the body is said to be at rest.
E.g. A table lying in a room is at rest with respect to the walls of the room.
Motion: A body is said to be in motion if it changes its position with respect to its surroundings.
E.g., A car running on the road is in motion with respect to the lamp posts, trees or bus stop on the roadside
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Convert the following temperature to Celsius scale.
573 K
Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
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