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Science Experiments

By Ashley K Tommo, Alvina Cho, Aira Payne

Aira Payne

on 28 February 2013

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Transcript of Science Experiments

Team 0 + - = 9 8 7 1 2 3 4 5 6 c Observation During The Lab Tests and Predictions Materials Water Testing Experiment Water Testing Clarity Test Chlorine &
Test Hardness Test pH Test Presence of
Test Clarity Test 2 beakers
Filter paper
Graduated Cylinder Chlorine and Chloride Test 3 small test tubes
Silver Nitrate (AGNO3)
1 pipette By Ashley, Alvina, Aira :) Tap Water Pond Water Sea Water Hardness Test Graduated cylinder
3 large test tubes
3 test tube stoppers
Soap flakes Presence of Organism Test 1 large test tube
1 test tube stopper
Bromothymol blue
Pipette pH Test pH paper
3 test tubes Prediction Prediction We think that all of the 3 samples will have pH 7. Prediction Tap Water = Will not bubble the most because we think that there's a lot of magnesium and calcium in Macau's Tap water
Pond Water = Will not bubble because the water also come's from pipes like Tap Water
Sea Water = Will not bubble because sea water is natural Prediction Tap Water: Will turn foggy and light milky white
Pond Water: Will turn milky white but not too much
Sea Water: Will turn the most milky white Prediction Tap Water: We think that the coffee filter will trap the least substance from the water
Pond Water: The coffee filter will trap some of dirty soil and substances.
Sea Water: The coffee filter will trap the most dirty substance. Before the test Clarity Test Chlorine & Chloride Test Observation Organism Test In the water clarity test, we will test to see how clear the water is by filtering it through a funnel with coffee filter paper. The funnel is placed in a beaker so the water will drip through the filter paper leaving the dirt behind. In the Chlorine and Chloride test we are testing if there is Chlorine or Chloride inside of the water. We are going to put 5 drops of silver nitrate into each sample. If the sample turns milky and white, that means there is a presence of chlorine or chloride in the water. In the hardness test we are going to test if there is any presence of calcium or magnesium inside of the water samples. We will put tiny flakes of soap and dissolve the flakes by shaking the tube vigorously. If the soap wont lather/ bubble properly and it leaves a film on the side of the sample tube, then that means it has calcium or magnesium in it. In this pH test we are trying to find out if the water is acidic or not. We are going to take a special pH paper. We dip the paper in our samples and it will turn a certain color according to the acidic level. In this presence of organisms test, we are going to test if there is any organisms inside of the water. We are going to put 5 drops of bromothymol blue and leave it for 24 hours. Organisms will release CO2 if they live. The water will turn into a certain color to tell us if the water is full of CO2 or O2. Keep in mind that we are only doing the sea water! Conclusion Observation Observation Conclusion Hardness Test Conclusion pH Test Observation Conclusion Observation Conclusion Pond Water Sea Water Sea Water Pond Water The sea water isn't clear at all it has a lot of other substances inside. The coffee filter absorbs the most dirt from this water. We were right in our hypothesis because we predicted the same thing.
The pond water isn't clear too. The coffee filter has absorbed a lot of brown sand. We were right again in our prediction. After the Lab After 24 hours After leaving the sea water for 24 hours the bromothymol blue turns light yellow.
Yellow means it is acidic. Acidic means there are a lot of carbon dioxide in it.
If there are carbon dioxide in it that means there are organism living in the water.
We also predicted that there are organism inside and we're right once again. All of the water samples seem to be in between the pH 6, 7 and 8.
That means all of the samples are neutral.
We also wrote this in our hypothesis and we are right about it. Sea water has the most chloride because it turned very milky compared to the other 2 samples. We were right about this in our prediction.
Pond water turns into a really light fog. This means that the pond water has the tiniest amount of chlorine and chloride in it. Again, we were right.
Tap water turns into a thick fog. This means that the water contain some chlorine in it. We were also right about this in our hypothesis. During The Lab part 2 After The Lab L o u i s H a r r y N i a l D I R E C T I O N Z a y L i A l n a m s h ~ A i r a A l v i na P i g i g e on :) :( o_O :I >:) ;) $_$ My Face is too awesome Ash Alvina Aira Pond Water: Yes.
Sea Water: Yes.
Tap Water: No. All 3 samples doesn't lather properly.
The sea water bubble the least. This means that the sea water has the most magnesium & Calcium in it. We were wrong in our prediction because we didn't expect this to happen.
The Tap water and Pond water bubble a little more that the sea water. This means that both of them contains some magnesium and calcium in it. This time, we were right in our predictions. TAP POND SEA SEA WATER SW: Sea Water
PW: Pond Water
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