WHY CAN FILTRATION SEPARATE DIRT FROM MUDDY WATER WITHOUT CHANGING THE WATER CHEMICALLY?, THE FILTER TRAPS SOLID PARTICLES WHILE THE LIQUID PASSES THROUGH, THE FILTER CHANGES DIRT INTO WATER, IF TWO FILTER PRODUCE ALMOST SAME-LOOKING WATER, WHAT CAN YOU SAY ABOUT THEIT RESULTS?, THEY HAVE SIMILAR FILTRATION RESULT, THEY MUST BE MADE OF THE SAME MATERIAL, WHY WAS GRAVEL USEFUL IN THE FILTRATION PROCESS?, IT COULD REMOVE ALL SUBSTANCES DISSOLVED IN WATER, IT COULD TRAP DIRT PARTICLES, WHICH STATEMENT BEST EXPLAINS THE RESULT OF CHARCOAL AND GRAVEL?, GRAVEL HELPED TRAP LARGER PARTICLES, WHILE CHARCOAL HELPED REDUCE CLOUDINESS AND COLOR, GRAVEL AND CHARCOAL BOTH WORKED ONLY BY CHANGING THE ACIDITY OF THE WATER, IF THE TISSUE-FILTERED WATER STILL LOOKED DIRTY, WHAT IS THE MOST REASONABLE EXPLANATION?, SOME PARTICLES WERE STILL ABLE TO PAST THROUGH ITS SPACES, TISSUE AUTOMATICALLY MAKES WATER DIRTY, IF A FILTER PRODUCES DOES THAT AUTOMATICALLY MEAN WATER IS COMPLETELY PURE?, YES, BECAUSE CLEAR WATER HAS NO IMPURITIES, NO, BECAUSE CLEAR APPEARANCES DOES NOT NECESSARILY MEAN THE WATER IS COMPLETELY PURE, WHY IS IT USEFUL TO COMPARE ALL SIX FILTRATION RESULTS INSTEAD OF LOOKING AT ONLY ONE?, IT ALLOWS US TO DETERMINE WHICH FILTERS PERFORMED BETTER OR HAD SIMILAR RESULTS, IT GURANTEES THAT EVERY FILTER WILL PRODUCE THE SAME RESULT, WHICH MATERIAL WAS USED TO TEST THE ACIDITY OF FILTERED WATER?, LITMUS PAPER, TISSUE, IF THE WATER LOOKS CLEARER AFTER FILTRTION, WHAT DOES MAINLY SHOW?, SOME VISIBLE SOLLID PARTICLES WERE REMOVED, ALL MICROORGANISMS AND DISSOLVD SUBSTANCES WERE REMOVE, BAASED ON THE INVESTIGATION, WHAT IS THE BEST CONCLUSSION?, EVERY FILTER IS EQUALLY EFFECTIVE BECAUSE THEY ALL FILTER WATER, DIFFERENT FILTER MATERIALS CAN PRODUCE DIFFERENT LEVELS OF CLARITY, WITH CHARCOAL AND FINE GRAVEL GIVING THE CLEAREST RESULT IN THIS INVESTIGATION

RESEARCH

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