Atoms and Molecules — Science STD 9 — Question

How can we separate particles of colloidal solution? Name the process.

A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose?

Each beehive consists of thousands of hexagonal thin-walled fragile cells. Name the material which is used to make these cells and mention the significance of the hexagonal shape of the cell.

What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?

Name these force:
The upward push of water on a submerged object.

A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

Name the scientist who gave the three laws of planetary motion.