PASCAL Platinum 7th Edition

ScienceCells—DiscussionAnimal cells have got cytoplasm, nucleus, cell membrane andvacuole. Nucleus is the brain of the cell and it controls the activitiesof the cell. Cytoplasm is a watery fluid that fills the cell. Most of thechemical reactions take place in there. Cell membrane is a thin skinthat surrounds the cell. It controls what enters and leaves the cell.Vacuole is filled with cell sap and it stores important chemicals.Plant cells have got cytoplasm, nucleus, cell membrane and vacuole which are the same with theanimal cell. They also have got cell wall and chloroplasts. Cell wall supports and strengthens the celland gives it shape. It also stops it popping if it becomes too full of sell sap. Chloroplasts absorblight energy and use it to make food. This action is called photosynthesis.Different kind of cellsRed blood cell: carry oxygen around bodyEgg cell: female sex cell in humansPollen cell: male sex cell in plantsEpithelial cell: covers the body and protectsour organsPalisade cell: found in plantsSperm cell: male sex cell in humansNerve cell: sends signals around our bodyNefeli Kimonos, 1BREACTION OF MAGNESIUM WITH ACIDSHere we have Magnesium reacting with an acid. Equation:Metal + Acid à Salt + HydrogenEvery time a metal reacts with an acidwe have 4 remarks:1. Bubbles (Hydrogen Gas)2. Heat given out3. Formation of a saltThe metal gets smallerMETAL MAGNE-THE ‘‘POP’’ TESTIf we want to check if we have hydrogen in our reaction we do the POP test. In order to do the POP test wehave a reaction. Then we light a match above the tube the reaction took place and if we hear a POP sound itmeans that we have Hydrogen.Iliada Hadjisavva, 3BPASCAL Platinum 7th Edition 34