do you know how to make your own filter

What is filtration?

Filtration is separating solids from liquids by adding a medium through which only the liquid can pass. 

Examples are:

1.  a tea bag is a filter 
2.  coffee uses a filter
3.  a pool has a filter
4. your kidneys

Materials

1. dirty water

2. bottle split

3. sand

4. pebbles

5. filter paper

6. scissors

7. cup

8. funnel

Process - ( use verbs or doing words in each step )

Step 1

Cut the bottle in half.

Step 2

Put the top half upside down inside the bottle bottom. 

STEP 3

Add layers of filter paper and add sand and pebbles.

STEP 4

Get 1 cup of dirty water.

STEP 5

Pour dirty water into the upside down bottle.

When I did my one we did it all correct but it dd not work it was still dirty. I think it did not work because we only put one layer of filter paper.