Physical And Chemical Changes Review Question Preview (ID: 47721)
Physical And Chemical Changes.
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Which of these actions to substances can be reversed?
a) Melting
b) Rusting
c) Burning
d) Baking
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) Step 1
b) Step 2`
c) Step 3
d) Step 4
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) She makes a mixture.
b) She makes a solution.
c) She makes a new substance.
d) She changes a state of matter.
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?
a) by causing the sugar to melt
b) by causing the water to evaporate
c) by causing the water to freeze
d) by using a magnet to attract the sugar
Which observation about a substance is NOT evidence that a chemical change occurred?
a) a change in state
b) a change in odor
c) the formation of bubbles
d) the formation of a new solid
Which of these actions will cause a chemical change?
a) evaporating a substance
b) burning a substance
c) evaporating a substance
d) mixing two different states of the same substance
During which change does water particles move faster and farther apart?
a) evaporation
b) melting
c) condensation
d) freezing
Folding a piece of paper is an example of a physical change.
a) True
b) False
c) sdg
d) sdg
Fireworks are examples of physical changes.
a) True
b) False
c)
d)
An example of a chemical change is when a cut apple sits out on the counter and turns brown.
a) True
b) False
c)
d)
A rusty nail is an example of a chemical change.
a) True
b) False
c)
d)
A burning candle is an example of both a chemical and physical change. The wick burning is chemical and the wax melting is physical.
a) True
b) False
c)
d)
Coloring a piece of paper yellow is an example of a chemical change.
a) True
b) False
c)
d)
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