Answer:
Scientists try to figure out how the natural world works. In doing so, they use experiments to search for cause and effect relationships. Cause and effect relationships explain why things happen and allow you to reliably predict what will happen if you do something. In other words, scientists design an experiment so that they can observe or measure if changes to one thing cause something else to vary in a repeatable way.
Answer: Algal blooms can leak toxins into the body of water it's in.
Explanation:
This can ruin the quality of the water and everything in it.
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Answer:
Oxygen's atomic number is 8. Thus, neutral oxygen has 8 protons and 8 electrons.