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Earn 100

Solve the riddle.
I am a process and a part of the water cycle. I make the puddles disappear. What am I?

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Important Questions on Our Basic Needs

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Environmental Studies>My Special World>Our Basic Needs>Water Cycle
"Spirit kept in an open watch glass is converted into gaseous state even at room temperature". Explain.
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
What is known as evaporation?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
 What is evaporation? In what way is it different from boiling?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
How do evaporation and boiling differ? Explain.
HARD
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
What is evaporation? Discuss three factors on which evaporation depends.
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Equal amounts of water and alcohol are separately placed in two identical Petri dishes. Which will evaporate faster - water or alcohol?
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
The changing of a vapour into a liquid is called
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
During evaporation, the particles of liquid evaporate from -
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Which of the following is a surface phenomenon?
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
A pure solid is obtained from its solution by
HARD
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
What is evaporation? State one large-scale use of the process of evaporation.
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Define evaporation.
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle

Define evaporation. Give an example that indicates that evaporation is an endothermic process.

MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
What is evaporation? How will you show that evaporation causes cooling?
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Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Form a similar pair of words.
Saltwater : _____ (condensation/evaporation) :: muddy water : filtration
HARD
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Define evaporation? How is salt prepared at seashores?
HARD
Environmental Studies>My Special World>Our Basic Needs>Water Cycle

Why can sugar not be separated from water by evaporation? 

(Hint: Sugar will get charred if the solution is heated excessively). 

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Environmental Studies>My Special World>Our Basic Needs>Water Cycle
The process of change of a liquid into vapour at any temperature is called -
EASY
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
What happens when we boil water? 
MEDIUM
Environmental Studies>My Special World>Our Basic Needs>Water Cycle
Is evaporation an endothermic or exothermic process? Give one example to support your answer.