19-02-20

Today Irene has told us that next week we will do an exam practice about the unit.
Then, we have started to talk about the moon. We have made a practice exercise, and the conclusions were these: The reason that we can only see one part of the moon is that the moon is always looking at the same direction when rotating around the earth. As it rotates really slow.

Then we talked about the phases: new moon, first quarter - it looks like a D , full moon and finally third quarter - it looks like a C.
We also talked about synchronous rotation, which is a movement of the moon.
We saw a video about the phases of the moon, which explained why and how these phases occur.
Then Irene told us to pay attention to some words and write their meanings. The word waxing means to increase over time.
If we can only observe from the earth one part of the moon which is the dark part - it is new moon.
From the earth we cannot see the moon fully lighted.
The earth and the sun are in the ecliptic plane but the moon is not, so that’s the reason the moon can receive light from the sun at some point.

Only those in the Earth that are at day time, can point towards the moon.
The third quarter moon can be seen at midnight until the sun starts to rise.
From new moon to first quarter we can find waxing and crescent moon; from first quarter to full we can find waxing/gibbous moon;from full moon to third quarter the moon can be waving/gibbous; and finally from third quarter to new moon it is waving/crescent.
Finally, we talked about eclipses: solar and lunar.
Eclipses means that there is an object that hides another one.  The phases in which we can find an eclipse are only in new moon and full moon.

Then, we have seen a video really interesting about all these things that we have learned today.