Dhiren M Doshi Solutions for Exercise 1: Periodic Assessment- 2 (Based on Chapters-7 to 9)

Choose the odd one out. Give the reason for your choice.

Hinge, pivot, cardiac

Circle the odd ones. Give the reason for your choice.

See-saw, nutcracker, crowbar

_____ is the force that tries to stop the sliding movement of objects across a surface. (Gravitation/ friction)

Choose the right word and fill in the blank provided below.

_____ (Boiling/Sedimentation) is one of the simplest ways to purify drinking water. 

How many vertebrae are present in the backbone? $\left(206/ 33\right)$

What do we call the machines that consist of many simple machines? 

Name an insoluble impurity present in water. 

What is an inclined plane? Give an example of its use.