PLEASE HELP DONT SKIP ANSWER.

Explanation:

Remember that a physical change only changes the appearance, while a chemical change creates completely new substances. Also, note that there are 5 main signs of a chemical change:

In this experiment, acid was added to a piece of metal. Bubbles formed and the metal turned black. Therefore, 2 signs of a chemical change occurred. The metal changed colors and a gas was formed, signified by the bubbles. So, the best answer choice is C: A chemical change because a new gas was formed.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.

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