Today in science we investigated five different substances (sugar, flour, coffee, sand and oil) to see how soluble they were when added to water.
First, we ensured that we understood the key terms used in the lesson, which included: soluble, insoluble, reversible, irreversible, prediction, fair test and independent variable. Next, we discussed substances that we knew already would dissolve when added to water and substances that we would like to investigate. After making our prediction, we carried out the investigation and found that the only soluble substance was sugar; all of the other substances did not dissolve. Finally, we concluded the investigation and when doing so, we suggested improvements to the investigations. Some suggestions included:
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This week in science we investigated the property of strength in materials. We decided to test the strength of four types of paper: poster paper, writing paper, tissue paper and kitchen roll paper.
We used different weights (grams) to test the strength of each and found that poster paper was the strongest - holding up to 200g! Tissue paper was the weakest, because it was not able to hold even 20g! As a result, we found that the more resistant a material is to a pulling or pushing force damaging it, the greater its strength. |
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July 2019
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