HARD
8th CBSE
IMPORTANT
Earn 100

Identify the sources of noise pollution in your locality. Discuss with your parents, friends and neighbours. Suggest how to control noise pollution in your locality. 

Important Questions on Periodic Test - 3

HARD
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 1
Sex chromosomes in females are of
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 1
Endocrine glands have no ducts, so they are called
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 1
The word force is associated with:
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 1
A force which acts at the surface of contact of two bodies when one body tends to move or moves upon the other body is known as: 
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 1
Sound cannot travel through:
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 2

Fill in the blank with the correct options from the bracket.

Hormones are produced by _____. (organs/ glands)

MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 2
The force of friction acts in the _____ direction to the direction of applied force.
MEDIUM
8th CBSE
IMPORTANT
Learning Elementary Science with Online Support>Chapter 22 - Periodic Test - 3>PERIODIC TEST - 3>Q 2
The pressure of air _____ with the increase in height from the ground.