Volcanic Earthquakes
During Term Three, 6W learnt about earthquakes including volcanic earthquakes. We learnt
that
molten rock, called magma, is stored in reservoirs under volcanoes.
As
this magma moves upwards, it can fracture the rock it squeezes through,
causing earthquakes, usually with magnitudes not much greater than 5.0.
Sometimes the magma collects in a high
level reservoir prior to a volcanic eruption and as it moves around it
causes bursts of continuous vibration, called volcanic tremor.
Because
of these precursors, seismographs (earthquake recorders) are very useful
for monitoring volcanoes to give warning of
an impending eruption.
The culmination of our learning was observing a
replica volcanic eruption.
The images below show this occurring.
Marvelous Micro-organisms
6W, this term, has enjoyed learning through experiments.
One experiment was baking bread with yeast and without yeast.
We learnt that bread without yeast did not rise and that bread cooked with yeast rose and was very tasty! Lesson learnt:yeast used in bread-making is a micro-organism that requires food and the right temperature and conditions to grow, which causes bread to rise.
The bread machine hard at work!
The smell of bread baking in the classroom was amazing.
What a difference in our loaves of bread!
No yeast in this loaf.
This very large loaf was cooked with yeast.
Now it is time to taste the loaf with yeast added. Yum!
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