The substance must be able to alter its physical characteristic (for example, its color) in accordance to a change in pH. One example of this is litmus paper, which becomes red under acidic conditions and blue under basic conditions.
Answer:D. Water has a neutral pH.
Explanation:
Colored sesame seeds are neutrons and plain sesame seeds are protrons.
Answer:
Temperature, light, and wind are three of the main factors that affect the physical characteristics of a lake.
Explanation:
Temperature and light vary from lake to lake. Depth, plant growth, dissolved materials, time of day, season, and latitude can all affect light's ability to pass through the lake's water
I think the answer is "It's tightly packed cells allow for protection against harmful substances."
