WorksheetsMatter and Physical and Chemical Change Test
Total questions: 20
Worksheet time: 10mins
Salt is added to a glass of water and stirred until the salt is no longer visible. Which of the following best describes the change that occurs?
It is a physical change because the salt dissolves, but its chemical structure does not change.
It is a physical change because the salt combines with the water to form a new compound.
It is a chemical change because the salt disappears into the water.
It is a chemical change because the salt reacts to create a new substance.
A block of ice is left in the sun, and it melts into a puddle of water. Later, the water evaporates into the air. Which of the following best describes the series of changes?
Both are physical changes because the states of matter are changing, but the substance remains water.
The melting is a physical change, but the evaporation is a chemical change.
The melting is a chemical change, and the evaporation is a physical change.
Both are chemical changes because the ice and water are turning into new substances.
Which observation shows that a chemical change has occurred?
A glass cup breaks into pieces.
A puddle of water evaporates in the sun.
A piece of paper turns black and produces smoke when burned.
Salt is stirred into water and dissolves completely.
Which of the following is an example of a physical change?
Rust forming on a metal bike left in the rain.
Mixing vinegar and baking soda to create bubbles.
Melting chocolate to pour into a mold.
Burning wood in a campfire.
A student adds a white powder to water, and the mixture becomes cloudy. Then, the student observes bubbles forming and the container feels warm to the touch. Which of the following best explains what is happening?
The powder is dissolving in the water, which is a physical change.
A chemical change is occurring, producing a gas and releasing heat.
The water is evaporating, which is a physical change.
The powder is settling at the bottom, which is a physical change.
