Worksheetsphysical and chemical changes
Total questions: 101
Worksheet time: 51mins
What type of change can be easily reversed?
chemical change
physical change
both chemical and physical changes
neither physical or chemical changes
Which of the following is an example of a physical change?
a bike rusting
toast burning
butter melting
food spoiling
Which of the following examples is a physical change but NOT a change of state of matter?
logs burning
water freezing into ice cubes
candle wax melting
paper being cut
Which of the following is an example of a chemical change?
a penny tarnishing
a mirror being scratched
hair being cut
water being boiled
What is the best way to separate a mixture of sugar, sand, and water?
Freeze the mixture, causing the water to be destroyed, then sift the sugar from the sand.
Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate.
Filter the mixture, causing the sugar and sand to get caught but not the water.
Stir the mixture, causing the water to move above the sugar and sand.
A student is investigating changes with common classroom materials. Which of the following BEST describes the conclusion the student can make about the investigations?
The paperclip shows evidence of a physical change by changing the shape of the object, whereas the pencil eraser and hole puncher show evidence of a physical change by changing the size of the object.
All three investigations show evidence of a physical change due to a change in the color of the original substance.
The paperclip and hole puncher shows evidence of a physical change by changing the chemical properties of the original object, whereas the pencil eraser shows evidence of a physical change by changing the size of the object.
All three investigations show evidence of a physical change due to a change in state of matter.
A 5th grade student places baking soda in a cup. The student then adds vinegar to the cup. The student collects the data below from the experiment. Based upon the results of the experiment, which statement BEST describes whether the change is a physical or chemical change.
The data concludes that a physical change has occurred because it had an increased change in temperature, which resulted in the liquid to start bubbling.
The data concludes that a physical change has occurred because the color of the liquid changed when you mixed two materials.
The data concludes that a chemical change has occurred because there was formation of bubbles when the materials reacted to each other.
The data concludes that a chemical change has occurred because mixing two substances together will always result in a reaction.
Which of the following is a correct statement about the investigations?
All of the situations are examples of physical changes because all of the investigations exhibit changes to the physical properties.
None of the situations are examples of physical changes because they all involve a color change.
Situation 2 is a physical change because rust forming is a natural process.
Situations 1 and 3 are physical changes because no new substances are formed.
Three students at Mountain Park Elementary were given an assignment by their science teacher to plan and carry out experiments where chemical changes would occur. The chart shows each student’s plan and the results he or she recorded. Which statement is true about the experiments?
Student A was the only one to create an experiment where a color change occurred. This shows evidence of a chemical change.
Student A, Student B, and Student C all created experiments where chemical changes occurred. Student A observed a color change, Student B saw bubbles, and Student C was able to dissolve salt.
Student B and Student C created experiments were chemical changes occurred. Student A just dyed her water. Student B and Student C both changed their substances to prove that they had chemical changes. Student B created a gas while Student C got rid of the salt.
Student B was the only one to create an experiment with evidence of a chemical change. She created a new substance, a gas.
A teacher takes a tray of ice cubes out of the freezer. Each student takes an ice cube and holds it in their hands. They make the observations listed in the chart. The student claims that changing the temperature of the water causes a physical change that turns water into ice.
Which argument BEST supports the student’s claim?
The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.
The ice cube is freezing in the student’s hand since the hands are much warmer than the ice. Heat is being removed from the ice, which causes the particles to move slower.
The ice cube is melting in the student’s hand since state is changing from a solid to a liquid. Heat is being removed from the ice, which causes the particles to move faster.
The ice cube is melting in the student’s hand since state is changing from a liquid to a solid. Heat is being added to the ice, which causes the particles to move slower.
A physical change is
a change where the characteristics do not change the substance
a change where the characteristics do change the substance
a change where the chemistry changes
Which of the following examples represents a physical change?
When sugar dissolves in water a ______________ change occurs.
Physical change
Chemical Change
Which of the following is evidence of a physical change?
New substance
Shape Change
Light produced
Gas released.
Properties that describe how a substance looks, feels, or its state of matter, etc. are __________________.
Chemical properties
Physical properties
Why does the image best represent an example of a physical change?
The pencil can no longer be used.
The pencil is a different size.
The materials making up the pencil did not change.
The materials making up the pencil are different.
What is the definition of chemical change?
any change that results in the formation of one (or more) new chemical substance(s).
changing of only the appearance of the object
matter cannot be created or destroyed, only change form
changes affecting the form of a chemical substance, but not its chemical composition.
Choose every image that represents a chemical change.
Think this through: Can the same substance undergo both a physical and a chemical change at the same time.
Yes
No
A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical change?
Cutting a piece of paper with scissors.
Folding a piece of paper into an airplane.
Ripping a piece of paper with their hands.
Burning a piece of paper with a match.
Is melting butter for popcorn a chemical or physical change?
chemical
physical
Change in color is a physical change.
True
False
Rust on an iron bar is an example of chemical change.
True
False
When you break a cracker into pieces it is a...
Chemical change
Physical change
The melting of wax is an example of a
chemical change
physical change
Cutting a log in to small pieces is a chemical change.
true
false
What is physical change?
How two chemicals react with one another when combined
A property that we can measure or observe with our 5 senses or other tools
When two chemicals react with one another to form a new substance
When a change occurs but it does not result in the formation of a new substance
What is chemical change?
How two chemicals react with one another when combined
A property that we can measure or observe with our 5 senses or other tools
When two chemicals react with one another to form a new substance
When a change occurs but it does not result in the formation of a new substance
When you increase the energy by heating a liquid what happens to the motion of the molecules
They slow down
They speed up
Heat doesnt change the motion of the molecules
Which of the following is an indication of chemical change
Melting
Freezing
Burning
Evaporating
What do we call the molecules that are present at the end of a chemical reaction?
Reactants
Products
Ingredients
Atoms
Thermal energy (heat) is released or absorbed during the reaction explains the _________________
Change in color
Change in temperature
Change in gas
