Show:
Chemistry
Matter
Scientific Method/Elements
Mixtures/Pure Substances
Changes
100
This is the study of substances that contain carbon and hydrogen
organic chemistry
100
What two properties must matter have
mass and volume
100
What is a hypothesis?
tentative explanation; educated guess in the form of an if/then statement
100
What are the two types of mixtures?
homogeneous and heterogeneous
100
This is defined as a change in a substance that does not involve a change in identity of the substance
physical change
200
This is defined as a substance produced or used by a chemical process
chemical
200
What is an atom
smallest unit of a substance that still maintains the substance's identity
200
What elements have the symbols O, C, and N?
O=Oxygen C=Carbon N=Nitrogen
200
Give an example of an element and an example of a compound
Various answers
200
Ice melting is an example of this
physical change
300
This type of chemistry deals with the identification of materials by looking at compositions
analytical chemistry
300
What does the law of conservation of matter say?
matter cannot be created or destroyed in an ordinary chemical reaction
300
Name the six steps to the scientific method
question, research, hypothesis, experiment, analysis, and conclusion
300
Name 3 ways we can separate mixtures
filter, centrifuge, evaporation, sift, magnetism, etc
300
baking a cake is an example of this
chemical change
400
Define chemistry
study of the composition and structure of materials and the changes they undergo
400
What are the different states of matter and determine their shapes and volumes
solid (definite, definite) liquid(indefinite, definite) gas (indefinite, indefinite)
400
What is the difference between a law and a theory?
Laws describe facts or phenomena where theories explain facts or phenomena. A law is proven and not disputed and a theory predicts results
400
Describe the difference between homogeneous and heterogeneous
homogeneous- uniform throughout heterogeneous- not uniform throughout (salt water/veg soup example)
400
What must occur for a chemical change to happen?
a new substance with different characteristics must have formed
500
Name the five types of chemistry
organic, inorganic, biochemistry, analytical, physical
500
Name an extensive property and name an intensive property
can vary (extensive= depends on extent) (intensive=does not depend on amount)
500
Describe the difference between an element and a compound
Elements cannot be broken down into other stable substances, but compounds can. Elements are made of only one kind of atoms, where compounds have 2 or more different atom types
500
Can’t be separated into other substances without changing its identity and property is a part of the definition of this
pure substance
500
What is another name for chemical change and what are the two types? Define them.
chemical reaction; exothermic=gives off heat and endothermic= requires heat