Use the pH color scale. It shows acidity level of both acids and bases. You dip one of the pH strips into whatever liquid you choose, and then compare the new color of the pH strip to the colors on the scale. This will tell you the level of acidity. pH scale can be found below. As you can see, the brighter colors are more acidic than the darker and duller colors.
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Well there are many ways for scientific models to be use like if something was small and you couldn't see it u would have to make a model of that
Explanation:
If this didn't help I'm sorry
The techniques earthquake is a term which refers to the science of constructing buildings that are able to withstand the effects of an earthquake.
The instruments used to measure the intensity and direction of an earthquake are known as a seismograph and a seismoscope. The seismograph measures the movement of the ground during an earthquake. The seismoscope shows the direction of an earthquake.
The Intensity Scale is a scale that measures the intensity of an earthquake. It also measures the effects of an earthquake.
The answer to this question would be D.) Permafrost prevents penetration of deep roots.
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