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Step 1:: Define a Petri dish and a watch glass using words.
A Petri dish is a shallow, circular container with a lid, used in scientific laboratories for culturing cells or microorganisms. It has a polystyrene or glass base and is typically 100 mm in diameter and 15 - 20 mm deep. A watch glass, also known as a flat-bottomed boiling stone, is a shallow, circular, concave-shaped piece of glassware used in chemistry and biology labs. It has a flat, ground glass bottom and gently sloping sides, making it suitable for evaporating small quantities of liquids or holding solid samples during experiments.
Step 2:: Define filtration.
Filtration is a laboratory technique used to separate particles from a liquid suspension or a gas. This process involves passing the mixture through a filter medium, such as filter paper, membrane filters, or glass filters, which retains the solid particles while allowing the liquid or gas to pass through.
Step 3:: Define a heterogeneous mixture.
A heterogeneous mixture is a type of mixture that contains two or more phases, such as solid, liquid, or gas, which are not uniformly distributed throughout the mixture. The composition and properties of heterogeneous mixtures can vary from one location to another within the mixture. Examples of heterogeneous mixtures include sand in water, oil and water, and a bowl of trail mix.
Step 4:: Sketch the Petri dish and watch glass (not provided in this text-based format).
For a visual representation of the Petri dish and watch glass, refer to a reference image or create a simple sketch of each item.
Final Answer
The difference between a Petri dish and a watch glass: - A Petri dish is a shallow, circular container with a lid, used for culturing cells or microorganisms, while a watch glass is a shallow, circular, concave-shaped piece of glassware used for evaporating small quantities of liquids or holding solid samples during experiments. Definitions: - Filtration: A laboratory technique used to separate particles from a liquid suspension or a gas by passing the mixture through a filter medium. - Heterogeneous mixture: A type of mixture that contains two or more phases, such as solid, liquid, or gas, which are not uniformly distributed throughout the mixture. Sketches: - Petri dish: A shallow, circular container with a lid. - Watch glass: A shallow, circular, concave-shaped piece of glassware.
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