Anna and Isaac place two pepper plants in two different pots. One of the pots is old and has been used before. The other pot is brand new and much larger than the other. They make sure the plants have the same amount of soil and receive the same about light and water each day. They give the plant in the large pot 1 tsp of Epsom Salt once a week. They do not give the other plant any Epson Salt.

Explain two reasons why Anna and Isaac’s data may not be valid. 10 points each
What can Isaac and Anna do to improve their experiment and ensure that their data is valid? 10 points
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