Which of these actions to substances can be reversed? 

A student carries out an investigation and records his steps and observations in the table.  1. Rinse the apple with water.The apple looks cleaner.2. Rub the peel of the apple with sandpaper. The texture of the appl

A chef examines and tastes several ingredients. Then she chops up the ingredients and combines them to make a salad. Which statement BEST describes the chef's actions? 

A teacher mixes sugar and water in a class demonstration. The sugar dissolves in the water.How can the teacher separate the substances in this solution?

Which observation about a substance is NOT evidence that a chemical change occurred? 

Which of these actions will cause a chemical change?

During which change does water particles move faster and farther apart?

Folding a piece of paper is an example of a physical change.

Fireworks are examples of physical changes.

An example of a chemical change is when a cut apple sits out on the counter and turns brown.

A rusty nail is an example of a chemical change.

A burning candle is an example of both a chemical and physical change.  The wick burning is chemical and the wax melting is physical.

Coloring a piece of paper yellow is an example of a chemical change.

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