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Science Quiz on How Things Work :16.06.2020

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Question 1

The process of removing seeds and debris from cotton is known as

Question 2

How many primary colours are there?

Question 3

Inside the petals, in the middle of a flower, we find a thin powdery structure called

Question 4

A Shooting Star is a

Question 5

Directions: Answer the following questions by selecting the most appropriate option.
Barometer is used to

Question 6

Direction: Answer the following question by selecting the correct / most appropriate options.
When a candle burns :
a) its size decreases.
b) there is melting of wax.
c) flame and soot can be seen.
d) melted wax also solids.
From the above observations, which one of the following is correct?

Question 7

Direction: Answer the following question by selecting the correct / most appropriate options.
Each cell in our body contains DNA. We also have proteins and fats in our body. What is common among DNA, proteins and fats?

Question 8

Direction: Answer the following question by selecting the correct / most appropriate options.
A rubber sucker, when pressed on a surface sticks to it because of :

Question 9

Which of the following rays travels with highest speed?

Question 10

Which of the following represent the relationship between object distance (u), image distance (v) and focal length of the spherical mirror?
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