Wednesday, February 17, 2016
Learning about Caves
4HR went on our field trip to the Batu Caves today. We investigated the following questions:
What changes have happened? And who/what caused those changes?
Here is what we found out.
Alicia - The farmers put dynamite in the cave and blew it up. So the floor was a lot deeper than it was naturally (before).
Jack - They did this to find limestone (or dinosaur fossils). The limestone was valuable for cement.
Julie - Humans carved their names into the walls.
Questions to be answered: Is limestone valuable because it is a sedimentary rock? Or it is shiny?
Omar - Water used to be in the cave by coming through holes.
Ranvir - Acid water causes a change in the cave by making holes.
Ashton - This is how stalactites and stalagmites are formed. Over a hundred million years, it will form a column.
Rea - Acid rain has a special kind of carbon dioxide that has calcium.
Kaelyn - Water drips from a stalactite to make a stalagmite.