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WorksheetsPhysical Science| Chapter 2
Total questions: 28
Worksheet time: 9mins
A material that can be represented by a chemical formula is
an element
a mixture
a homogeneous mixture
a pure substance
The chemical formula for water, H20, means that each water molecule contains
two hydrogen atoms and two oxygen atoms
two hydrogen atoms and one oxygen atom
two hydrogen atoms and zero oxygen atoms
one hydrogen atom and two oxygen atoms
Which of the following is not a potential sign of chemical change
release of gas
evaporation of water
change of color
production of gas
The smallest unit of an element that maintains the properties of that element is a(n)
molecule
atom
substance
compound
Which of the following is not a pure substance
element
molecule
compound
mixture
which of the following is an element
salt
iron
nylon
sand
Helium is used in balloons because it is
reactive with rubber
lighter than air
flammable
a colored gas
A chemical property of copper is its
reactivity
density
melting point
color
A physical property of gold is its
reactivity with powerful acids
non flammability
density
none of the above
Which of the following is not a physical property of iron
melting point
color
conductivity
ability to rust
Which property of a substance is not affected by physical changes?
reactivity
size
position
shape
Which of the following causes a chemical change?
moving
shattering
burning
melting
A chemical change occurs whenever
substances are mixed
objects change shape
hot objects melt
new substances form
Which of the following is a physical change
dissolving
evaporating
bending
All of the Above
Matter is defined as anything that
can be seen and touched
can be weighed
has mass and takes up space
contains kinetic energy
The smallest unit of a substance that behaves like the substance is a(n)
element
molecule
atom
compound
which of the following is an element
steel
bronze
iron
brass
Which of the following is made of at least two different types of atoms?
element
matter
molecule
compound
which of the following is not an example of a physical property
freezing point
boiling point
reactivity
density
Digesting food is an example of
physical change
chemical change
buoyancy
change of state
A substance that cannot be broken down into simpler substances is an
compound
mixture
element
atom
Which of the following is an example of a chemical property
reactivity with oxygen
solubility in water
density
color
Knowing the chemical properties of a substance will tell you how the substance
looks
can be broken down into atoms
smells
reacts with other substances
A substance is made of atoms of more than one type chemically bound together is called a(n)
A compound
A mixture
A ______________ property describes how a substance acts when it reacts with other substances
Chemical
Physical
A physical change differs from a chemical change in that __________________ are formed
compounds
new substances
Grinding quartz crystals down to produce sand causes a(n) _______________ change
Physical
Chemical
A change in color during a reaction is often a sign that a(n) ____________________ change has occured
Physical
Chemical
