<u>Answer:</u>
<em>A constant is something whose value cannot be changed and is used for comparison purpose. </em>
<u>Explanation:</u>
The controlled variable is a type of variable whose value is kept constant during the experiment to get the desired or expected result. The difference between constant and a control variable is that the constant can never be changed.
However, the value of control variable can be changed but is kept constant with a purpose in an experiment to get the data. The controlled variable in a battery can be the multi meter that should be used for all the batteries.
Because we can’t tunnel down, so in order to study the interior layers, we must use indirect methods.
Answer:
These are all chemical changes you can pick which ever one you would like
Explanation:
Burning, cooking, rusting, rotting,food cooking, rust formation, tarnish forming on doorknobs, fuel burning for heat, tarnished penny.Fireworks explosion. Rotting bananas. Grilling a hamburger. Saliva digesting sugar with the use of amylase.
