Gases

 

 Rainbow 🌈 Mental Exercise, daily activity 

1. Which gas in atmosphere, creates greenhouse effect 

 A) Nitrogen 
 B) Oxygen 
 C) Carbon dioxide 
 D) All of above 

ANSWER= (C) Carbon dioxide 
Explain:- Carbondioxide gas in atmosphere absorbs heat energy, leading green house effect.

 

2. Excess amount of carbon dioxide is responsible for

 A) global cooling 
 B) global warming 
 C) global warning 
 D) global heating 

ANSWER= (B) global warming 
Explain:- Carbondioxide holds heat energy, increases temperature of the Earth. 

 

3.Which of the following gas protects us from harmful radiation of sun ?

 A) Ozone
 B) Nitrogen 
 C) Carbon dioxide 
 D) Oxygen 

ANSWER= (A) Ozone 
Explain:- Ozone layer stops UV rays from entering the Earth surface. .

 

4.What is very hot wind called ?

 A) Loo
 B) Cool breeze 
 C) Monsoon air
 D) Trade wind 

ANSWER= (A) Loo
Explain:-Very hot wind is  called Loo.

 

5. Green plants produce _________ during photosynthesis. 

 A) Nitrogen 
 B) Oxygen 
 C) Carbondioxide 
 D) all of above 

ANSWER= (B) Oxygen 
Explain:- Plants use Carbondioxide for preparing food by photosynthesis and release Oxygen. 

 

6. Air moves from high pressure to low pressure 

 A) Partially true
 B) Partially false 
 C) true
 D) false

ANSWER= (C) true
Explain:- Air always moves from high pressure region to low pressure region. 

 

7.Without Greenhouse effect Earth would have been too cold to live

 A) True
 B) False
 C) Partially true
 D) Partially false 

ANSWER= (A) True
Explain:- It is green house effect in atmosphere, keep Earth warm at night also.

Here's a video representation: