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Which observation about a substance is NOT evidence that a chemical change occurred?
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
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?
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
A burning candle is an example of both a chemical and physical change. The wick burning is chemical and the wax melting is physical.
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
An example of a chemical change is when a cut apple sits out on the counter and turns brown.
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
Which of these actions to substances can be reversed?
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
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?
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
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
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
Coloring a piece of paper yellow is an example of a chemical change.
False
by causing the water to evaporate
True
Melting
She makes a mixture.
a change in state
Step 4
True
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