How would you survive with no water in the desert?
eserts are the driest places on Earth—they get fewer than 25 centimetres of rain a year. Some deserts may get a lot of rain all at once and then it might not rain again for months—or even years!
A third of the earth’s land is desert! Deserts can be superhot, the highest recorded temperature on earth was in Death Valley in 1913 where the temperature reached 56.6 degrees Celsius! Not all deserts are hot though, the largest Desert in the world is Antarctica, even though it’s covered in snow and ice- it rarely snows which is what makes it a desert. Also, deserts can be very cold at night time, reaching freezing point, even if they’re scorching in the day.
- Plastic bag/ cling film
- Rocks/ stones
- mud/ sand/ leaves
- Mug/ cup
- jug of water
- Go out into the garden/ park and collect some mud and leaves- pop them into your bowl
- Nestle your mug/ cup into the centre of the bowl, do not let the mud or leaves go inside though
- You can pour some water onto the mud/leaves is you like
- Place the cling film over your bowl
- Pop one rock in the middle of the cling film, above the cup
- Wait for the sun to do its work!
This is an example of a solar still. The light from the sun passes through the plastic which heats soil surrounding your cup. Since there is water trapped within the soil, the sun’s warmth will cause it to evaporate (turn into water vapour). The plastic traps the water, and it’ll condense and funnel it back into the cup. The process of evaporation separates impurities in the water, making what is collected suitable to drink.