PH stands for potential hydrogen.
pH can be accurately tested using acid-based indicators since it is a part of the pH of something itself. (acid and bases) The indicators themselves work when the acidic properties of the indicator begins to dissolve and form ions which gives the color indicating the pH.
Answer: Cardiovascular System
Explanation:
This involves your heart, blood, veins, and arteries
There you go BRAINLIEST would be appreciated
Answer:
it's a chemistry change
Explanation:
this is because heat is causing permanent changes and can no longer be changed back to its original atate
Answer:
the second one looks like it so I picked the second one
