HELP Dump the soil and water from the first experiment into a small bucket. Rinse the glass, and get out a second glass. In this experiment, you will test the acidity of the soil. Pour ½ cup of soil into each glass. Slowly pour vinegar onto the soil in one glass, stopping when the glass is full. Slowly pour the baking soda solution onto the soil in the other glass until that glass is full. Record any reaction you see. If there is no reaction, write that down.

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.

the correct answer to this question is 2

the answer is c.the valence of the atoms combine .