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100
The amount of matter in an object
its mass
100
A substance made of only one kind of atom that cannot be broken down into simpler substances by ordinary chemical means.
an element
100
a change from one state of matter to another, such as solid to liquid.
Phase Change
100
When a solid turns into a liquid, it is called
melting
100
When a liquid turns into a solid
freezing
200
Give an example of a physical change
water freezing, ice melting, mixing sugar and water, boiling water etc...
200
The amount of space an object takes up
its volume
200
A characteristic that can be observed without changing the substance’s identity (e.g., color, density).
Physical Property
200
a change in matter that does not produce a new substance.
physical change
200
A characteristic that describes a substance’s ability to undergo a chemical change (e.g., flammability).
Chemical Property
300
When a liquid gains energy and becomes a gas
evaporation
300
The substances formed after a chemical reaction
products
300
In a chemical reaction, the starting substances are called __________
reactants
300
__________ describes how well a substance can dissolve in another substance
solubility
300
When a gas cools and turns into a liquid
condensation
400
What is the smallest unit of matter that retains the properties of an element?
An Atom
400
Two or more atoms that are bonded together
Molecule
400
A substance made of two or more substances physically mixed but not chemically bonded
mixture
400
Give an example of a chemical change in everyday life
baking a cake, leaves changing color, food digesting in the body, burning wood, etc...
400
A process in which substances are changed into new substances with different properties.
Chemical Reaction
500
A material that has a uniform and definite composition.
Pure substance
500
Draw a diagram of the reaction of Hydrogen gas H2 and oxygen gas O2 combining to form water H2O (2h2 + 02→ 2H20)
500
A substance made when two or more elements are chemically combined
a compound
500
A __________ shows that the number of atoms of each element is the same on both sides of the reaction
Balanced chemical equation
500
A __________ is a man-made material created from natural resources
synthetic material