Is Matter Around Us Pure ? — Science STD 9 — Question

A mixture contains water, kerosene and sand. How will you separate this mixture?

Using following data, draw time-displacement graph for a moving object:

Time (s)	0	2	4	6	8	10	12	14	16
Displacement (m)	0	2	4	4	4	6	4	2	0

 Use this graph to find average velocity for first 4s, for next 4s and for last 6s.

Write down the differences between diffusion and osmosis.

Describe a simple experiment to show that the prongs of a sound producing tuning fork are vibrating.

What is artificial insemination? Describe this technique.

Why are we able to sip hot tea or milk faster from a saucer rather than from a cup?

Name two indigenous and two exotic breeds of poultry. Write a note on egg production and broiler production.

State the main points of difference between homogeneous and heterogeneous mixtures.