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An example of a physical change is
a baking a cake
b heating sugar
c dissolving salt in water
dissolving salt in water
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An example of a chemical change is
a boiling water
b burning wood
c crushing a can
burning wood
-
Sugar and salt are examples of
a elements
b pure substances
c atoms
pure substances
-
Substances that CANNOT be broken down chemically into other substances are
a elements
b compounds
c mixtures
elements
-
The measure of how much matter an object contains is its
a volume
b weight
c mass
mass
-
The measurement of how much mass is contained in a given volume is called
a weight
b melting point
c density
density
-
All elements are composed of extremely small particles called
a compounds
b atoms
c molecules
atoms
-
Which is NOT an example of a chemical change?
a rust forming on iron
b salt dissolving in water
c gas burning on a stove
salt dissolving in water
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What holds atoms together in a molecule?
a density
b gravity
c chemical bonds
chemical bonds
-
The volume of an irregular shaped object can be measured by
a multiplying length by width by height
b submerging the object in water in a graduated cylinder
c placing the object on a triple-beam
balance
submerging the object in water in a graduated cylinder
-
In the laboratory, volumes of liquid are usually measured with a(n)
a scale
b triple-beam balance
c graduated cylinder
graduated cylinder
-
Anything that has mass and takes up space is called
a matter
b energy
c heterogeneous
matter
-
How would you calculate the density of an object?
a divide its weight by its volume
b divide its mass by its volume
c multiply its volume times its mass
divide its mas by its volume
-
The SI unit for mass is
a ounce
b kilogram
c liter
kilogram
-
Lemonade consists of several substances that are NOT chemicall combined, so lemonade is classified as a(n)
a compound
b mixture
c pure substance
mixture
-
How do liquid water, ice and water vapor differ from each other?
a they are different compounds
b they are different states of matter
c they are made of different kinds of atoms
they are different states of matter
-
If you heat a liquid and measure the temperature at which it boils, you are measuring a(n)
a atomic property
b physical property
c molecular property
physical property
-
If you describe methane as a gas that easily catches fire, you are describing a
a chemical property
b state of matter
c chemical formula
chemical property
-
Soil, a salad, and sugar water are all examples of
a mixtures
b elements
c atoms
mixtures
-
During photosynthesis, plants transform electromagnetic energy from the sun into
a electrical energy
b kinetic energy
c chemical energy
chemical energy
-
In which state of matter do the particles spread apart and fill all the space available?
a gas
b solid
c liquid
gas
-
The change from liquid to solid, or the reverse of melting, is called
a condensation
b boiling
c freezing
freezing
-
The amount of space that gas takes up is its
a volume
b mass
c density
volume
-
The tarnishing of metal is an example of
a dirt
b physical change
c chemical change
chemical change
-
A ______ is formed when two or more substances are so evenly mixed that you can't see the different parts.
a pure substance
b solution
c compound
solution
-
A ______ is a group of two or more atoms that are held together by chemical bonds.
a molecule
b atom
c solution
molecule
-
All matter has 2 kinds of properties: physical properties and _______ properties.
a atomic
b heterogeneous
c chemical
chemical
-
Hardness, texture, color, and freezing point are examples of ______ properties.
chemical or physical
physical
-
Dissolving sugar in coffee is an example of a ______ change.
chemical or physical
physical
-
The characteristic temperature at which a pure solid changes to a liquid is its ______ point.
melting
-
a glass breaks...chemical or physical change?
physical
-
paper burns...chemical or physical change?
chemical
-
vinegar reacts with baking soda...chemical or physical change?
chemical
-
water boils at 100 degrees...chemical or physical change?
physical
-
iron & sulfur are heated to form a non-magnetic shiny substance...chemical or physical change?
chemical
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