Water enters the root hair cell by osmosis. Osmosis is the movement of water from a dilute solution to a more concentrated solution, through a partially permeable membrane. The solution inside the root hair cell is more concentrated than that of the soil water, so water moves from the soil into the cell. EQUIPMENTS USED - 3 EMPTY CONTAINERS OF THE SAME HEIGHT - 3 DIFFERENT COLOURED FOOD COLOURING -A WHITE CHRYSANTHEMUM FLOWER (REPLACING THE CARNATION) -WATER -SCISSORS STEPS 1) POUR ONE COLOUR OF FOOD COLOURING TO EACH BOTLLE (DIFFERENT COLOURS IN EACH BOTTLE) 2)POUR WATER AND MIX IT WITH THE FOOD COLOURING . MAKE SURE THE WATER IS FULLY COLOURED. 3) CUT THE STEM OF THE CHRYSANTHEMUM FLOWER INTO THREE WITH A SCISSORS. 4) PUT EACH STEM INTO ONE BOTTLE 5) WAIT FOR IT TO CHANGE COLOUR ! PHOT0 OF THE FLOWER EVERY 1HOUR.OBSERVATIONS THE FLOWER CHANGED COLOR AFTER A PERIOD OF TIME AS WATER WAS ABSORBED THROUGHTHE STEM. THE STEM THEN TRANSPORT THE WATER TO THE PETALS OF THE FLOWER THEREFORE BEING ABLE TO SEE THE DIFFERENT COLORS. DIFFICULTIES THE STEM WAS HARD TO CUT AS ITS REALLY THIN . IMPROVEMENTS BUY A WHITE FLOWER WITH BIGGER STEMS AND CUT IT WITH A KNIFE INSTEAD OF A SCCISORS. final results.._.ALTHOUGH THE EXPERIMENT DIDNT WORKED OUT AS WELL AS IT WAS SUPPOSE TO , IVE LEARNT AND HAD FUN GOING THROUGH THE PROCESS OF HOW TO DYE A CARNATION .
I've learnt that surgeries have to be fast and carefully done if not the patient might die due to lack of blood or oxygen.
I've also learnt that iodine is used as an antiseptic to prepare the skin before surgery , killing off bacteria . Lastly , I've learnt that a suture tread is used to sew our wound after a surgery as well as an organ in place . Posing a serious health threat to Singaporeans, dengue fever is an infectious tropical disease transmitted by infected Aedes mosquitoes. These mosquitoes become infected by the virus when they bite infected people, and in a vicious cycle, transmit the infection to the other people they bite. Symptoms of classical dengue fever are flu-like and develop within 4 to 7 days of infection. They include:
Occasionally, dengue fever can develop to potentially lethal complications such as dengue haemorrhagic fever and dengue shock syndrome. Dengue hemorrhagic fever is a severe form of infection by the dengue virus and can result in death. It is characterised by severe bleeding from the gums and nose, and purplish bruises. Dengue shock syndrome usually occurs in children who have had dengue fever before. It is sometimes fatal and is accompanied by massive bleeding and very low blood pressure. SECTION A - MCQ
Q4.I've learnt that if the boiling point of water is more than the boiling point of the ink , the colour of the liquid in the beaker should be colourless. CORRECT ANSWER ; B Name Of separation method ; Distillation Flask ; Blue Beaker ; Colourless SECTION B - SHORT ANSWER QUESTIONS Q6B.Both paracetamol and caffeine cannot be dissolved in solvent. Q6C. I've learnt that paracetamol and caffeine may not dissolve in oil. Q6e. I've learnt that water-based ink will dissolve in water, therefore a water-based ink cannot be used to draw the start line. Q6f.I've learnt that paper chromatography can be used to separate a mixture as the mixture consists of substances which are not chemically combined together. Q8A. I've learnt that stomach enzyme works best at a temperature of 35 degree celsius and pH level of 6.4. SECTION A - MCQ
1.Beginning of the stopclock to the end . CORRECT ANSWER ; C (35s) 4. The instrument to measure the mass of a metal block is a mass balance. CORRECT ANSWER ; D (MASS BALANCE) 17.When alkaline is added to red cabbage juice , natural indicator , the juice will turn to green. CORRECT ANSWER ; A (GREEN) 18.To make river water suitable for use in car battery , it should go through the process , evaporation. CORRECT ANSWER ; A SECTION B - SHORT ANSWER QUESTIONS 2C. Range of pH values for acidic substances of is 0 to less than 7. 7b. The method of tasting a food not good enough to determine if the food is acidic , alkaline or neutral as taste is people dependent. SECTION C - FREE RESPONSE QUESTIONS 10C. Caffeine, paracetamol and the other drugs found may not dissolve in oil. Therefore the separation method's result would not likely be similar. 11b.At L, the toy car still has some kinetic energy. This causes the toy car to continue moving until all the kinetic energy is changed to heat and sound energies. |
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