WorksheetsPhysical and Chemical Changes
Total questions: 38
Worksheet time: 32mins
Which of the following is evidence of a physical change?
New substance
Shape Change
Light produced
Gas released.
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.
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
Properties that describe how a substance looks, feels, or its state of matter, etc. are __________________.
Chemical properties
Physical properties
Is melting butter for popcorn a chemical or physical change?
chemical
physical
A change in which NEW substances are formed.
Chemical change
Physical change
Salt dissolved in water is a
physical change
chemical change
if there is a change in color, production of light, production of heat, production of gas, production of smell or formation of a new substance.
physical change
chemical change
A physical change _____________ the identity of the substance.
changes
maintains
Color change like in a drop of food coloring in water, is a _________ change.
physical
chemical
The formation of a solid when two liquids combine is called?
Solidification
Freezing
Precipitate
Solubility
baking soda and vinegar chemically combine to make a new substance. What type of change is this?
chemical change
physical change
chemical change
physical change
This image shows what happens when methane gas (CH4) is burned (reacts with oxygen O2). Which of the following is a reactant?
Methane (CH4)
Water (H2O)
Carbon dioxide (CO2)
none of the above
This image shows what happens when methane gas (CH4) is burned (reacts with oxygen O2) to produce carbon dioxide and water. Which of the following is a product?
methane (CH4)
oxygen (O2)
carbon dioxide (CO2)
none of the above
This image shows what happens when methane gas (CH4) is burned (reacts with oxygen O2). This represents a chemical change because
there is only one carbon atom.
the products and reactants are made of atoms and molecules.
there are the same number of atoms before and after.
the atoms have rearranged to form new molecules.
