In experiment #2 you are asked to use the scientific method to develop and execute a method of separating a mixture of sand, salt and iron pellets. Imagine you are in a lab and notice that a plate of bacteria grow faster in the presence of sunlight. After that single observation, you come to the conclusion that sunlight causes bacteria to grow fast. What would be the next step in the scientific method for this experiment?

1. separation can be done with help of magnetic bar and filtration.

2. the next step will be testing the hypothesis.

Explanation:

1. Separation of iron pellets from sand,  and salt first

Use a magnet

Due to magnetic force iron pallets will attach with it and separation will occur from sand and salt.

After separation of iron pallets, add water to mixture of sand and salt and heat until salt get dissolved then filter the salt water.

This will help in separating all three components of mixture to separate.

2. Bacteria growth

Hypothesis must be tested-

In this case a hypothesis and conclusion is represented. Conclusion is provided that in presence of sunlight growth of bacteria is faster. So the hypothesis must be verified by scientific experiment to be a valid theory by measuring or monitoring growth in presence of sunlight.

it takes hundreds of years to become stable.

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