KS3 Science [antikvár]

Life Processes and Cells Dead or Alive? \ There are seven things that all living organisms do - these are called "life processes". An organism is only alive if it does all seven life processes. The Seven Life Processes | - Remember by the jollyism: "MRS NERC" M - Movement Moving parts of the bodv. R - Reproduction Producing offspring. S - Sensitivity Responding and reacting. N - Nutrition Getting food to stay alive. E - Excretion Getting rid of waste. R - Respiration Turning food into energy. G - Growth Getting to aduit size. | Organisms are just Living Things j 1) All living things are made up of tiny building blocks known as cells. 2) These can be seen through a microscope - but it helps if you stain them first. 3) There are two types of cell you need to know about: ANIMAL and PLÁNT CELLS. Animál and Plánt Cells have Three Differences | An Animál Cell BOTH HAVE: A Plánt Cell ONLY PLANTS HAVE: 1) A Nucleus: This controis what the cell does. SIZE: about 1/100 mm. 2) Cytoplasm: This is a jelly-like stuff where all the chemical reactions happen. 3) A Cell Membrane: This is a thin skin around the cell - it holds the cell together and alsó controis what goes in and out. 1) Cell wall: A rigid coating made of cellulose - it gives support to the cell. SIZE: 40 times as big as an anlmal cell. 2) Vacuole: A large space fii led with cell sap - a weak solution of sugár and salts. 3) Chloroplasts: These contain chlorophvll used for photosynthesis. Welcome to the eighth life process - revision 1 forgót to mention that one at the top, didn't I. Live life to the full, prove to yourself that you're alive... cover the page. scribble it all down and repeat until perfect. Section One - Life Processes and Cell Activity