Match the term with its description. Match Term Definition D Acid A) A compound that increases the hydroxide ions (OH−) when it is dissolved in a solution A Base B) A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water C Ions C) An atom or molecule that has a positive or negative charge B pH D) A compound that increases hydrogen ions (H+) when it is dissolved in a solution

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

∠gdh and ∠edh on edg.

answer is c