Hey There!
Here is your answer:
Your answer is that a experiments should be controlled because the experiment could go out of control which could harm or hurt someone.
Also the definition of a controlled experiment is a part of the experiment that's not touched.
Ex: Water is your controlled experiment that's because our not doing anything to the water.
If you need anymore help just ask me!
Hope this helps!
Answer:
how many letters are there before skills?
Explanation:
If there is two spaces then i have the wrong answer
<span>The answer to this is Halcion which is medical treatment given to patients with sleeping disorders such as insomnia. It helps you fall asleep faster and for a longer period of time.</span>
<span>genetically engineering rice that can be grown in more varied climates </span>
