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:
1.
BIOLOGY
having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
2.
PHYSIOLOGY
of or in a state of abnormally high muscle tone.
Explanation:
Found it on google ;)
Hormones are sent throughout the system
Answer:
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight.
First one is Model and second one is Inference
