Unit 1 Study Guide Flashcards
(31 cards)
What is chemistry?
The study of matter and change
What are the chemistry disciplines?
Organic, inorganic, biochemistry, analytical, and physical
What is organic chemistry?
Study of matter with carbon
What is inorganic chemistry?
Study of matter without carbon
What is biochemistry?
Study of chemistry in living things
What is analytical chemistry?
Study of what matter is made of
What is physical chemistry?
Study of the change in matter in a molecular level
What is an independent variable? (X-variable)
The one that you change during an experiment
What is a dependent variable? (Y-variable)
Change as a result of changing the independent variable
What are the states of matter?
Liquid, gas, and solid
Solid:
Definite shape and definite volume
Liquid:
Definite volume but not definite shape
Gas:
No definite shape and no definite volume
What is a physical change?
A change that alters the substance’s appearance without changing its chemical composition
What is a chemical change?
The identities of substances change and new substances are formed
What is the smallest unit of matter called?
Atom
All matter is either a…
Pure substance or a mixture
What is a pure substance?
A single unit of matter, like elements and compounds.
What is an element?
A substance that only contains atoms from one type.
What are compounds?
Atoms of two or more elements that are chemically bonded.
What is a mixture?
The addition of two or more elements/compounds that are NOT chemically bonded
What are the two types of mixtures?
Heterogeneous and homogeneous
What is a heterogeneous mixture?
Not uniform throughout
What is a homogeneous mixture?
Uniform composition throughout
