WorksheetsChemical and Physical Changes
Total questions: 25
Worksheet time: 13mins
A pure substance that cannot be broken down physically or chemically into simpler substances
a compound
an element
a molecule
matter
a pure substance made by chemically combining two or more elements; cannot be separated physically
an element
a compound
an atom
parts of an atom
representation of the name of an element; written as a capital letter or a capital letter followed by a lowercase letter(s)
chemical formula
element
element symbol
molecule
examples of chemical changes (check all that apply)
Burning wood.
Boiling water
Baking a cake.
cutting hair
Rusting of iron.
Change which alters the physical properties of a substance without changing its chemical structure
Chemical Change
Physical Change
precipitate
chemical formula
How do you count the elements in a chemical formula?
Add the numbers
Count all the letters
Count the capital letters
Make a Lucky guess
Count the elements: Ca2OLi3Cl
3
4
5
6
Boiling water is an example of
chemical change
physical change
political change
climate change
Two liquids combining producing a solid, or a precipitate, is an example of
magic
water pollution
physical change
chemical change
Bubbles are always a sign of a chemical change!
TRUE
FALSE
A foul odor is coming from the refrigerator after returning from a long vacation. What has taken place? (choose all that apply)
A new substance has formed
A chemical change has occurred
A physical change has occurred
There is something wrong with your nose
Count the elements in the chemical formula:
CO3Cl4HeCu5
5
8
14
16
How are compounds and elements similar
both are pure substances
neither are pure substances
both can easily separated physically
both can easily separated chemically
The less energy particles have, the tighter they are packed together. Which state represents this event?
solid
liquid
gaas
Has no definite shape, but has a definite volume.
solid
liquid
gas
Particles have high energy, no definite shape, and no definite volume - takes the space of its container.
solid
liquid
gas
How are compounds and elements different?
elements are pure substance, compounds are not
elements cannot be broken down, compounds can be broken down chemically
elements can be broken down physically, compounds are not pure
compounds are pure substances, elements are not pure
which of the following is not a physical property?
odor
color
temperature change
mass
Which of the following is not a physical property?
length
formation of light
boiling point
state of matter
which of the following is not a physical property
melting point
burning
boiling point
freezing point
Burning wood is an example of
physical change
compound
chemical change
element
Which of the following is not a compound?
Cl
ChO
H2O
NO
which of the following is not a chemical change
rotting apple
digesting food
getting a hair cut
baking brownies
Burning a candle
physical change
chemical change
both
Which of the following is not a physical change
liquid melting
liquid evaporating
liquid freezing
liquid burning
