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: 2. Use a vacuum pump to remove the air from the bell jar.
: 3. Observe the changes to the plant.
====Germination and Water====
: 1. Get 2 pots with cotton wool in them.
: 2. Place 10 cress seeds in each pot.
: 3. Water 1 pot every day but do not water the other pot.
: 4. Observe the pots after 1 week.
====Germination and Temperature====
: 1. Get 2 pots with cotton wool in them.
: 2. Place 10 cress seeds in each pot.
: 3. Place 1 pot in a fridge with a glass door, so light can get in.
: 4. Place the other pot on top of the same fridge.
: 5. Observe the pots after 1 week.