The primary reason is to extract useful substances from a mixture, allowing for different components to be utilized in various ways. ![]() | Card: 2 / 34 |
A mixture is defined as a substance composed of two or more substances, where each component retains its unique property. True or False? | Card: 3 / 34 |
Fill in the blank: Distilled water is considered a ___ substance because each particle has the same unique property. | Card: 5 / 34 |
A pure substance has uniform properties throughout, while a mixture consists of two or more substances that retain their individual properties. ![]() | Card: 8 / 34 |
Riddle: I am everywhere, yet you can’t see me. I’m made of many gases mixed together. What am I? | Card: 9 / 34 |
True or False: A substance is called pure when it contains more than one type of particle. | Card: 11 / 34 |
False. A substance is called pure when each particle has the same unique property. | Card: 12 / 34 |
What method is primarily used for separating unwanted materials when they are in small quantities and visibly different in shape or color from useful materials? | Card: 13 / 34 |
Handpicking is used for separating unwanted materials that are in small quantities and differ in shape, size, or color from useful materials. | Card: 14 / 34 |
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Sieving is used to separate particles based on size, where larger particles are retained and smaller ones pass through the sieve. ![]() | Card: 18 / 34 |
Fill in the blank: When threshing is done using animals, they are tied to a ___ to walk over the harvested stalks. | Card: 21 / 34 |
What is the process of separating lighter particles from heavier ones using wind called? | Card: 23 / 34 |
In the winnowing process, the husk is carried away by the wind while the ___ grains fall to form a separate heap. | Card: 25 / 34 |
True or False: A combine harvester is used to harvest, thresh, and winnow crops in one operation. | Card: 27 / 34 |
What is the process called when insoluble particles settle down at the bottom of a liquid? | Card: 31 / 34 |
True or False: Decantation involves mixing a solid with a liquid to create a homogeneous solution. | Card: 33 / 34 |
False. Decantation involves pouring off the liquid from the settled solid, not mixing. ![]() | Card: 34 / 34 |

















