HARD
9th CBSE
IMPORTANT
Earn 100

Why does a desert cooler cool better on a hot dry day?

Important Questions on Matter in Our Surroundings

HARD
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Questions>Q 2
How does the water kept in an earthen pot (matka) become cool during summers?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Questions>Q 3
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Questions>Q 4
Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Questions>Q 5
What type of clothes should we wear in summer?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 1
Convert the following temperatures to celsius scale.
(a) 293 K
(b) 470 K
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 2
Convert the following temperatures to Kelvin scale.
(a) 25°C
(b) 373°C
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 3

Give reason for the following observation.

Naphthalene balls disappear with time without leaving any solid.
 

MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 3

Give reason for the following observation:

We can get the smell of perfume sitting several metres away.