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3 Cards in this Set
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- Back
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Water - Properties of Water
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1. Water is made up of particles of hydrogen and oxygen (H2O)
2. Pure water is colorless odourless and tasteless. 3. The boiling point of pure water is 100 ° c The freezing point of pure water is 0° c 4. Water is liquid over a wide range of temperature. (between 0° & 100°) 5. Pure water is neutral i.e it is neither an acid nor base (alkali) 6.Water has a very high surface tension. pH indicates how acidic or alkaline a substance is . (i.e the degree of acidity ) As shown above. Litmus is red in acids and blue in alkalis. |
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Cohesion and Adhesion
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Cohesion: the force of attraction between like particles e.g. water and water particles.
Adhesion: the force of attraction between unlike particles e.g. glass and water Capilliarity -the rise of a liquid in capillary (a narrow tube) This is due to the strong adhesion of water particles to the tube. Adhesion takes place before cohesion. |
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Investigating Capillarity
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The narrower the tube ,the higher the water rises.
bore = opening in tube Xylem - tubes that transport water from the root to the leaves in plants Phloem - transports food from leaves to the other parts of the plant. |
