Brainspace – July 2019

brainspace SUMMER 2019 35

How to make a water filter
A water filter removes all harmful substances from your water, making it
safe to drink. This filter is easy to make, and you should be able to find
most of the materials around your campsite.

of the Earth is covered

with water but only

3% of it can be used

for drinking.

75%

96%

of watermelon is

water. Great

hydration in every

bite! Yummy!

92%

You will need:

plastic water bottle, two plastic cups,

scissors, coffee filter, sand, small pebbles,

small rocks, cotton balls (from your first

aid kit).

Step 1: Cut 1 inch off the

water bottle bottom and recycle the

end.

Step 2: With your scissors,

poke a small hole through the lid.

Put the lid back on.

Step 3: Push the coffee filter

through the water bottle until it

touches the lid.

Step 4: Pour about 5 centi-

meters of sand into the coffee filter.

Step 5: Put a couple hand-

fuls of pebbles on top of the sand.

Step 6: On top of the

pebbles, drop in the small rocks.

Step 7: For extra filtration,

put in a layer of cotton balls.

Step 8: With the lid facing

down in one of the plastic cups, pour

in the dirty water.

Finally, boil the water for one full

minute, to get rid of any bacteria.

Enjoy!

Cucumber and lettuce

both contain 96% water.

Perfect for staying

hydrated and cool as a —

dare we say it? Cucumber.

Use Zappar. Scan for a video demonstration.