Friday 21st February

Year 8 Science

Please see below some revision notes that can help you prepare for your Topic 1 and 2 Quiz (held Friday 28th February).

Define the following terms: cells, tissue, organ, organ system, organelle, diffusion, osmosis, concentration, unicellular, multicellular, selectively permeable
Know how to label a plant and animal cell (there are lots of practice ones online if you do a google image search for labelling plant and animal cells)
Know the differences between plant and animal cells
Know the function of different organelle and whether they are found in plant, animal or both types of cells (cell membrane, cytoplasm, nucleus, vacuole, mitchondria, rough ER, smooth ER, Golgi Body, Cel Wall, Chloroplast)
Using amoeba and paramecium as examples, explain how they move, obtain food and reproduce.
Compare diffusion, osmosis and active transport (direction of movement in relation to concentration of solutions, types of substrates transported, use of energy, examples of the processes)
Be able to draw a picture of a beaker with a selectively permeable membrane that illustrates osmosis (making sure to include a legend and an arrow to indicate direction of travel)
Look at animal (eg: blood cells) and plant cells that are undergoing osmosis to determine the type of solution that will cause the cell to either shrink, burst become turgid or no change.

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