Answer:
Scientific experiments need to be repeated so that scientists can make sure the results are as accurate as possible.
Explanation:
The point of a scientific experiment is to find the answer to a question. If a scientist performs an experiment only one time, they might find an answer to their question. However, they might have messed something up, so the answer is completely wrong. Doing an experiment momre than once can help a scientist make sure that their answer is correct. I hope this helps!
The red is an oxygen molecule. 1 oxygen and 2 hydrogen =h2o or water!
Answer: See attached explanations
Answer:
The inhaling of oxygen and the exhaling of carbon dioxide. The process by which cells use oxygen to break down sugar and obtain energy is called respiration.
