Vocab
the term for a mixture with uniform composition
What is solution?
More dense matter will do this in liquid
What is sink?
This results in a new substance and is permanently changed
What is a Chemical change?
the term for going from a gas to a solid
What is deposition?
A substance containing 2 or more different atoms, bonded together is a
What is a compound?
this states that energy/mass is conserved in a chemical reaction
What is the law of conservation of mass/energy?
This takes up space and has mass.
What is matter?
All liquids have a specific boiling point which helps us identify the liquid, what is the boiling point of water? What is this type of property called?
What is 100 degrees Celsius? Intensive
A change in matter that involves a change in a physical property but doesn't create a new substance
What is Physical change?
pure substances can be categorized as
What are elements and compounds?
Atoms of only one type is called ______________
an element
density is what type of property
What is an intensive physical property?
the smallest unit of matter that still retains the properties of matter
What is an atom?
what is a state of matter that has definite shape and definite volume
What are solids?
Which change occurs when you bake cookies?
What is Chemical change?
the type of change that occurs when something dissolves (salt in water, food coloring)
What is a physical change?
Warmer temperatures make molecules move _______________ and colder temperatures make molecules move ____________.
What is faster and slower?
what are chemical properties and give examples
What are properties that require a chemical change in order to be viewed? oxidizer, flammability, toxicity, reactivity
this type of property requires the formation of a new substance
What is chemical property?
What should you use to separate small iron filings from a pile of sand?
What is a magnet for attracting the iron filings and leaving the sand behind?
Melting wax, ice, and metal are all what type of changes
What are physical changes?
state of matter with indefinite shape and indefinite volume
What is a gas?
A pure substance that can be separated chemically
What is a compound?
the amount of mass per unit volume
What is density?
a classification of matter that can be separated by physical means
What is a mixture?
what is an intensive property?
what is a physical property that is independent of the amount of the substance?
When an egg is cracked and then cooked there is a physical change and a chemical change that occurs-name both.
What are Physical change-cracking the egg and chemical change-cooking?
silver tarnishing is an example of a
What is a chemical change?
a classification of matter that is variable in composition and is not uniform
What is a heterogeneous mixture?
Two or more of the same element is called a
What is a molecule?