I Wonder ...

Mrs Whittfield brought along two hyacinth bulbs.  We put them into special shaped jars with water.  The jars stop the bulbs from filling to the bottom.  Each day we mark off a day on the calendar and check on the bulbs.  We are up to 9 days so far.  Some small roots are starting to grow.  In a magazine Louisa found a drawing of plants showing roots growing into the soil.  We looked at the drawings and our bulbs and did some wondering.
I wonder ...

• how does our bulb grow in water in the jar?
• do plants need soil to grow in?
• why is it taking a long time to grow?
• why is there some moss at the bottom of the bulb?  Will they stop growing?