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===Experiments===
====Plants and Sunlight====
: 1. Place some cress seeds in 6 different pots with soil.
: 2. Give them light and water them every day to grow normally for a few days.
: 6. Observe the results after 1 week.
====Plants and Water====
: 1. Place some cress seeds in 6 different pots with soil.
: 2. Give them light and water them every day to grow normally for a few days.
: 6. Observe the results after 1 week.
====Plants and Nutrients====
: 1. Place some cress seeds into 3 pots with soil.
: 2. Place the same number of cress seeds into some pots with cotton wool.
: 4. Observe the pots after 1 week.
====Plants and Air====
: 1. Place a plant with a 10cm stem into a bell jar.
: 2. Use a vacuum pump to remove the air from the bell jar.
: 3. Observe the changes to the plant.