Properties and Changes
What is a physical property?
Anything that describes an object based on the senses.
Matter is anything that has _______________ and takes up _______________.
Mass and space
What is an element?
A pure substance made up one type of atom that cannot be separated into simpler substances.
What is water?
Compound
What is a mixture?
A combination of two or more pure substances that are physically combined.
What is an example of a chemical property?
Reactivity
Combustibility
Acidity/Basicity
What is the smallest unit of matter?
Atoms
Where do you find elements?
Periodic Table
What is oxygen?
Element
What is a homogeneous mixture?
A mixture that is mixed up and evenly distributed.
What is a physical change?
A change that does NOT change what the substance is.
What are the four states of matter?
Solid, Liquid, Gas and Plasma
What is a compound?
A pure substance that is composed of two or more elements or molecules that are chemically combined.
What is coffee?
Homogeneous Mixture
What is a heterogeneous mixture?
A mixture where it is not mixed evenly.
What is a chemical change?
When two substances combine to form something new.
What happens to temperature during a phase change?
During a phase change, temperature stays the same.
How are compounds combined?
Chemically
What is salad dressing?
Heterogeneous Mixture
Give one example of a homogeneous mixture.
Lemonade, Kool-Aid, Tea, Coffee
Explain how eating is both a physical and chemical change.
By chewing, you are changing the shape of the food, but not the substance. When you are digesting, then you are creating something new.
Is changing state a physical or chemical change?
Physical
What is a molecule and an example?
When a group of two or more of the same atom are held together. Example could be O2 or H2.
When salt and water are combined, what is the solute and what is the solvent?
Salt: solute
Water: solvent
Give one example of a heterogeneous mixture.
Salad, pasta, jelly beans