56Earthworms spendtheir lives hiddenfrom view. Buildthem a worm hotelto discover whatthey do in the soil,before returningthem to the soilto carry on thegood work.Worm hotel
- Ask an adult to help you
cut the bottle in half, beingcareful with the scissors.Add a 10-cm (3.9-in) layerof soil. Spray itwith water.- Spraying water after
each layer, add 0.5 cm (0.2in) of sand, 0.5 cm (0.2 in)of compost, and 5 cm (2 in)of soil. Poke1-cm (0.5-in)holes in thehotel witha pencil.- Dig in your garden or
a park to find five worms.Put them in the hotel.They’ll burrow down,using the holes. Add leavesas food.BE A SOIL SCIENTIST
Healthy soils arehome to organisms,from earthworms totiny microbes. Ifyou’ve got a garden,bury a cotton sock tofind out if the soil isfull of hungry things.Make sure the sockis 100% cotton!You will need: a trowel, card, a shovel, a pen, tape, a stick, and an oldYou will need: a 2-litre disposable plastic bottle, scissors, garden compost,You will need: a patch of soil for growing, a trowel,Microbe meal
- Dig a 20-cm (7.9-in) pit and
put the soil on some paper.- Use a trowel to fill
the sock with someof the soil.- Put the sock in the
pit and cover it withthe rest of the soilfrom the paper.Perfectly Wonky carrots
Stones and twigsare often removedfrom the soil beforecarrots are grown.This is so theygrow straight downwithout objectsblocking their way.See what happensotherwise...- Carrot seeds should be
sown from April until July.Rake the soil to loosenit, and dig a 1-cm (0.5-in)deep row.- Sprinkle the carrot seeds
along the row, about 10 forevery 2.5 cm (1 inch) oflength. Cover with soil.- If there’s no rain in
the first few days,water the row and coverit with damp newspaperfor a week or so.Label the carrotswith the date,your initials, andthe plant name.056-057_Experiments.indd 56 14/11/2019 09:29