04/07/2020

In the morning, wind was strong, water rushed out of the channel of the lagoon. Two boats outside were waiting to enter. One was rushing in with full engine power, and the other was waiting for a while then return without success.

Since we can’t go out and play, lets do some experiments instead. There are three bottles of powder for cleaning the seawater desalinator. The labels had been corroded and they are unrecognisable. We only know one is acid, one is alkaline, the other is preservative. How to identify which is which? Just take some blueberries from refrigerator then we can start the litmus test: crush blueberries and squeeze the juice into three transparent containers, labeled them with letter ABC. Take the powder from each bottle and add into the juice in front. Observe that the colour: A becomes dark purple green, B turns orange yellow, and C does not change colour. From the result we can see that A is alkaline, B is acidic, and C is preservative. This experiment used anthocyanins in blueberry as tester, which is the same as litmus reagents. Using blueberries for this experiment is much cheaper than buying test strips, and the rest can be eaten, yum.

In the afternoon, wind was weakened a lot, and we took the motor dinghy to explore the island. the beach is covered with dead corals, there is a nice forest in the middle, the moon rises from the east of the island and the sun sets in the west, the sea turtles are swimming around and sea birds flying over, what a nice little shelter in the ocean.

Made fish-flavored eggplant for tea tonight.