1
00:00:04,980 --> 00:00:08,400
Hello, we are Gala and Milena and we are going to do an aquifer.

2
00:00:09,300 --> 00:00:19,160
The materials are stones, two transparent trays, beach sand, air, clay and water.

3
00:00:20,679 --> 00:00:25,059
An aquifer is a natural subterranean space where water is stored.

4
00:00:25,620 --> 00:00:33,880
We have two trays. In the first we are going to create a clay floor and in the second we are going to make a sandy soil.

5
00:00:33,880 --> 00:01:14,980
First we put the stones again in the other tray. Then we put a cap of beach sand until we cover completely the stones.

6
00:01:26,000 --> 00:01:49,439
We put a cap of smaller stones and finally we put the earth.

7
00:01:50,439 --> 00:02:13,840
We drop water on the top of each of them.

8
00:02:35,740 --> 00:02:37,740
After two hours the water has filtered.

9
00:02:37,740 --> 00:02:45,740
As we can see, the water has filtered in the two trees, but it filters better in the sandy soil, because the water goes down faster.

10
00:02:45,740 --> 00:02:51,740
The question we proposed was, with what type of soil does water filters best?

11
00:02:51,740 --> 00:03:01,740
And the provisional answer to this question or hypothesis is, it filters better with the sandy soil, and as we proved, we were right.

12
00:03:01,740 --> 00:03:05,740
This is our experiment. Thanks for watching.

13
00:03:07,740 --> 00:03:08,360
you