Our second topic in Biology is ''Cells and cell processes'' This unit provides an introduction to the Biology course. The unit considers the special features that make living things different from non-living objects. The structure and functions of animal and plant cells is studied. Some particular examples of specialized cells are then considered, which introduces the idea of structural adaptations for particular functions. Movement of substances within, and into living organisms by diffusion is studied. The basic nature and properties of enzymes are considered, including effects of temperature and pH on enzyme action.
This unit covers fundamental topics that will be drawn on in all the units that follow. The basic structure of cells provides essential basic knowledge which will be used and developed in future units. Knowledge of diffusion provides the foundation for understanding transport, digestion and gaseous exchange. Knowledge of enzymes and their action is required before digestion is covered in the next unit.
Special note: I will be available on Mondays after school until 4:30 and on Saturdays to offer extra help in science.
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| Grade 9 students prepare solutions to carry out Benedict's test. |
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| Students use Iodine to identify starch in a food sample. |
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| Grade 9 students practice lighting the Bunsen burner. |
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| Rian and Omer extract chlorophyll from leaves with alcohol to test the leaf fro starch. |
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