sentences
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chemical reactions cause new materials to form
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chemical change is a kind of chemical reaction
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fire is a kind of chemical reaction
| 1
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paper burns
| 1
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fire causes burning
| 1
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chemical reactions cause chemical change
| 1
|
magnesium is flammable
| 1
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flammability is a property of substance and includes values of flammable / inflammable
| 1
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magnesium is a kind of substance
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if a substance is flammable , it can burn
| 1
|
an example of a chemical property is the elements making up a compound
| 1
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water is made of hydrogen and oxygen
| 1
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a compound can be chemically separated into the elements that it is made of
| 1
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water is a kind of compound
| 1
|
when two substances together form a compound then those substances cannot be physically separated
| 1
|
a compound being broken down is a kind of chemical change
| 1
|
a compound can be chemically separated into the elements that it is made of
| 1
|
gold is a pure substance
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|
a pure substance is made up of only one kind of atom
| 1
|
lighting a match causes that match to burn
| 1
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fire causes chemical change
| 1
|
fire causes burning
| 1
|
oxygen is produced when electrical energy is added to water
| 1
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water is a kind of substance
| 1
|
electrical energy is added to water
| 1
|
an element is a kind of substance
| 1
|
chemical changes cause different substances to form
| 1
|
hydrogen is produced when electrical energy is added to water
| 1
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hydrogen is a kind of element
| 1
|
oxygen is a kind of element
| 1
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combining acid and protein can cause chemical change
| 1
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lemon juice contains acid
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milk contains proteins
| 1
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an example of a chemical property is how a material reacts chemically
| 1
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carbon dioxide is a new substance produced by sodium bicarbonate under proper conditions
| 1
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chemical reactions cause new substances to form
| 1
|
flammability is a kind of chemical property
| 1
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flammability is a property of matter
| 1
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matter in the gas phase has variable shape
| 1
|
the beach ball is pushed on the middle
| 1
|
a beach ball is a kind of container
| 1
|
matter with variable volume and shape takes the shape and size of its entire container
| 1
|
air is a kind of matter
| 1
|
if a flexible container is pushed on then that container will change shape
| 1
|
the beach ball is filled with air
| 1
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air is in gas phase
| 1
|
a beach ball is flexible
| 1
|
state of matter is a property of substance includes values of solid / liquid / gas
| 1
|
a thermal energy conductor conducts heat
| 1
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iron is a kind of solid
| 1
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metal is a thermal energy conductor
| 1
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iron is a kind of metal
| 1
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iron is always magnetic
| 1
|
iron nails are made of iron
| 1
|
paper is a kind of object
| 1
|
a pencil is a kind of object
| 1
|
if something undergoes a physical change then the physical properties of that something will change
| 1
|
tearing paper changes the shape of the paper
| 1
|
shape is a property of the appearance of an object
| 1
|
appearance is a kind of physical property
| 1
|
sharpening a pencil changes the shape of the pencil
| 1
|
a phase change is when a substance changes from one state of matter into another state of matter
| 1
|
water is a kind of substance
| 1
|
the molecules of a substance cannot move easily past each other in solid state
| 1
|
being a compound or an element is a chemical property of substances
| 1
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an example of a physical change is a phase change
| 1
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if something undergoes physical change then the chemical properties of that something will remain unchanged
| 1
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water is a kind of compound
| 1
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water changes into a phase where the molecules cannot move easily past each other
| 1
|
solid is a kind of state of matter
| 1
|
an example of a physical change is breaking an object
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a water pipe is a kind of object
| 1
|
a water pipe freezes and cracks on a cold night
| 1
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a phase change is a kind of physical change
| 1
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the water pipe freezes
| 1
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chemical change is the opposite of physical change
| 1
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cracking is a kind of breaking
| 1
|
freezing is a kind of phase change
| 1
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glass is a kind of object
| 1
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breaking down an object changes that object 's shape
| 1
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shape is a kind of physical property
| 1
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if something undergoes a physical change then the physical properties of that something will change
| 1
|
a solid is a kind of substance
| 1
|
faster means an increase / higher in speed
| 1
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as the temperature of a substance increases , the molecules in that substance will move faster
| 1
|
heat means temperature increases
| 1
|
a solid is heated
| 1
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mercury is liquid at room temperature
| 1
|
solid is a kind of state of matter
| 1
|
state of matter is a kind of physical property
| 1
|
liquid is a kind of state of matter
| 1
|
gold is a kind of solid
| 1
|
if a thing's physical properties change then it has undergone a physical change
| 1
|
shape is a kind of physical property
| 1
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breaking a bottle changes the shape of the bottle
| 1
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crumpling is a kind of change of shape action
| 1
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change of shape actions change the shape of an object
| 1
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a sheet of paper is a kind of object
| 1
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a mineral is a kind of solid material
| 1
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state of matter is a kind of physical property
| 1
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