Class -8th GK Questions and answer Unit -3

UNIT- 3 Environment and the world of science  

Topic-:    Who's The Scientist 

Match the name of scientists and their inventions and discoveries 

S.N.             Scientist             Inventions/Discoveries 

1.       Dr. Joseph Lister         Antiseptic Medicine 

2.        Nikola Tesla               AC Motar

3.    Michael Faraday           Electromagnetic Induction 

4.    Orville Wright                 Airplane 

        and Wilbur Wright  

5.   Carl Wilhelm Scheele        Chlorine

Topic :- Define Them    

Some terms of study that take specific names

S.N             Terms                             Name 

1.            Study of Shells                     Conchology 

2.            Study of Trees                    Dendrology 

3.            Study of Rock                    Lithology

4.            Study of food                     Bromatology

5.         Study of Gravitation             Barology 

      

Topic :-  Fear Factor 

Q.1    What is Phobia ? 

Ans:-    A phobia is a type of anxiety that results in a persistent and irrational fear of an object or situation.(फोबिया एक प्रकार की चिंता है जिसके परिणामस्वरूप किसी वस्तु या स्थिति का लगातार और अतार्किक भय बना रहता है।)

Q.2    What is meaning of phobia ? 

Ans:-     The word phobia comes from the Greek word phobos, which means fear or horror.

Q.3    The fear of small spaces is called ____________. 

Ans:-     Claustrophobia 

Q.4   The fear of driving  is known as _____________.

Ans:-    Vehophobia  

Q.5    What type of fear is found in mysophobia?

Ans:-    The fear of germs is called mysophobia . 

Q.6    The fear of height is called___? 

Ans:-     Acrophobia  

Topic :- Gases 

Q.1    Which gas is the lightest of all elements ? 

Ans:-     Hydrogen 

Q.   2    Which gas is said to be an 'Inert' gas ? 

Ans:-    Argon 

Q.3    Dry Ice is the solid form of which gas ? 

Ans:-    Carbon Dioxide 

Q.4   Which gas in its liquid state helps in freezing ? 

Ans:-     Liquid Nitrogen 

Topic :-  IT Wizard 

Q.1    What is blog ? 

Ans:- Writing or otherwise using online diaries known as web logs or blogs .

Q.2    Who is called Griefer ? 

Ans:-   A player of an online multiplayer game who harasses (परेशान ) other players . 

Q.3    Who is called Mouse potato ?

Ans:-    Someone who spends a lot of time on the computer . 

Q.4    What is Spamming ? 

Ans:-    The act of sending unsolicited(अनचाही) emails or posting useless message on a forum website. 

Topic :- Space Trivia 

Some unique name given to constellations (तारामंडल)

Q.1   Which constellations is known as the 'Lady in the Chair' ? 

Ans:-     Cassiopeia (  "W" shape )

Q.2    Which constellations is known as the Greater Huntsman ? 

Ans:-    Orion 

Q.3    ______________is commonly called the Greater Bear . 

Ans:-     Ursa Major

Q.4    ___________is commonly known as the Hare. 

Ans:-    Lepus