QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
# Question: What is the difference between a Petri dish and a watch glass? You may either define them using words or sketch them. Define filtration...
1. $\square$
What is the difference between a Petri dish and a watch glass? You may either define them using words or sketch them.
2. Define
a. filtration
b. heterogeneous mixture
c. $\square$
What is the difference between a Petri dish and a watch glass? You may either define them using words or sketch them.
d. Define
a. filtration
b. heterogeneous mixture
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Answer
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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.
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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